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context. t tauri stars are surrounded by dust and gas disks. as material reservoirs from which matter is accreted onto the central star and planets are built, these protoplanetary disks play a central role in star and planet formation.aims: we aim at spatially resolving at sub-astronomical unit (sub-au) scales the inne... | the gravity young stellar object survey. vii. the inner dusty disks of t tauri stars |
modeling atmospheres of hot exoplanets and brown dwarfs requires high-t databases that include methane as the major hydrocarbon. we report a complete theoretical line list of 12ch4 in the infrared range 0-13,400 cm-1 up to t max = 3000 k computed via a full quantum-mechanical method from ab initio potential energy and ... | accurate theoretical methane line lists in the infrared up to 3000 k and quasi-continuum absorption/emission modeling for astrophysical applications |
we present the first exoplanet atmospheric detection made as part of the spirou legacy survey, a large observing program of 300 nights exploiting the capabilities of spirou, the new near-infrared high-resolution (r ~ 70,000) spectropolarimeter installed on the canada-france-hawaii telescope (3.6 m). we observed two tra... | characterizing exoplanetary atmospheres at high resolution with spirou: detection of water on hd 189733 b |
sirius has always attracted a lot of scientific interest, especially after the discovery of a companion white dwarf at the end of the 19th century. very early on, the existence of a potential third body was put forward to explain some of the observed properties of the system. we present new coronagraphic observations o... | high-contrast imaging of sirius a with vlt/sphere: looking for giant planets down to one astronomical unit |
the irac ultradeep field and irac legacy over goods programs are two ultradeep imaging surveys at 3.6 and 4.5 μm with the spitzer infrared array camera (irac). the primary aim is to directly detect the infrared light of reionization epoch galaxies at z > 7 and to constrain their stellar populations. the observations... | ultradeep irac imaging over the hudf and goods-south: survey design and imaging data release |
we present an estimate of the performance that will be achieved during on orbit operations of the jwst mid infrared instrument, miri. the efficiency of the main imager and spectrometer systems in detecting photons from an astronomical target are presented, based on measurements at sub-system and instrument level testin... | the mid-infrared instrument for the james webb space telescope, ix: predicted sensitivity |
we examine morphology-separated color-mass diagrams to study the quenching of star formation in ∼100,000 (z ∼ 0) sloan digital sky survey (sdss) and ∼20,000 (z ∼ 1) cosmic assembly near-infrared deep extragalactic legacy survey (candels) galaxies. to classify galaxies morphologically, we developed galaxy morphology net... | galaxy morphology network: a convolutional neural network used to study morphology and quenching in ∼100,000 sdss and ∼20,000 candels galaxies |
aims: revealing the 3d dynamics of h ii region bubbles and their associated molecular clouds and h i envelopes is important for developing an understanding of the longstanding problem as to how stellar feedback affects the density structure and kinematics of the different phases of the interstellar medium.methods: we e... | self-absorption in [c ii], 12co, and h i in rcw120. building up a geometrical and physical model of the region |
accurate line lists are calculated for aluminium monoxide covering the pure rotation, rotation-vibration and electronic (b - x blue-green and a - x infrared bands) spectrum. line lists are presented for the main isotopologue, 27al16o, as well as for 27al17o, 27al18o and 26al16o. these line lists are suitable for high t... | exomol molecular line lists - ix. the spectrum of alo |
the infrared (ir) emission of polycyclic aromatic hydrocarbons (pahs) permeates our universe; astronomers have detected the ir signatures of pahs around many interstellar objects. the ir emission of interstellar pahs differs from their emission as seen under conditions on earth as they emit through a collisionless casc... | fully anharmonic infrared cascade spectra of polycyclic aromatic hydrocarbons |
while spitzer infrared array camera (irac) systematics are generally well understood, each data set can provide its own challenges that continue to teach us about the underlying functional form of these systematics. multiple groups have analyzed the phase curves of wasp-43b with varying detrending techniques, each obta... | introducing a new spitzer master bliss map to remove the instrument systematic phase-curve-parameter degeneracy, as demonstrated by a reanalysis of the 4.5 μm wasp-43b phase curve |
we present the upgreat thz heterodyne arrays for far-infrared astronomy. the low frequency array (lfa) is designed to cover the 1.9-2.5 thz range using 2x7-pixel waveguide-based heb mixer arrays in a dual polarization configuration. the high frequency array (hfa) will perform observations of the [oi] line at ~4.745 thz... | first supra-thz heterodyne array receivers for astronomy with the sofia observatory |
we present observations of two bright m dwarfs (toi-1634 and toi-1685: j = 9.5-9.6) hosting ultra-short-period (usp) planets identified by the tess mission. the two stars are similar in temperature, mass, and radius (teff ≈ 3500 k, m⋆ ≈ 0.45-0.46 m⊙, and r⋆ ≈ 0.45-0.46 r⊙), and the planets are both super-earth size (1.... | two bright m dwarfs hosting ultra-short-period super-earths with earth-like compositions |
recently published atacama large millimeter array (alma) observations suggest the presence of 20 ppb ph3 in the upper clouds of venus. this is an unexpected result, as ph3 does not have a readily apparent source and should be rapidly photochemically destroyed according to our current understanding of venus atmospheric ... | complications in the alma detection of phosphine at venus |
context. high-quality vibrational spectra of solid-phase molecules in ice mixtures and for temperatures of astrophysical relevance are needed to interpret infrared observations toward protostars and background stars. such data are collected worldwide by several laboratory groups in support of existing and upcoming astr... | lida: the leiden ice database for astrochemistry |
we explore the relationship between mid-infrared (mid-ir) and co rotational line emission from massive star-forming galaxies, which is one of the tightest scalings in the local universe. we assemble a large set of unresolved and moderately (~1 kpc) spatially resolved measurements of co (1-0) and co (2-1) intensity, i c... | phangs-jwst first results: a global and moderately resolved view of mid-infrared and co line emission from galaxies at the start of the jwst era |
we present the first superconducting hot electron bolometer (heb) waveguide mixer operating at 4.7 thz. the 5.5-nm-thick, 300-nm-long, and 3600-nm-wide nbn heb microbridge is integrated into a normal metal (au) planar circuit on a 2 μm thick silicon substrate. this circuit is integrated in a 24 μm × 48 μm × 21 μm waveg... | 4.7-thz superconducting hot electron bolometer waveguide mixer |
we present the first data release of the survey on extragalactic magnetism with sofia (salsa legacy program) with a set of 14 nearby (<20 mpc) galaxies with resolved imaging polarimetric observations using hawc+ from 53 to 214 μm at a resolution of 5″-18″ (90 pc-1 kpc). we introduce the definitions of and background... | extragalactic magnetism with sofia (salsa legacy program). iv. program overview and first results on the polarization fraction |
the successive addition of h atoms to co in the solid phase has been hitherto regarded as the primary route to form methanol in dark molecular clouds. however, recent monte carlo simulations of interstellar ices alternatively suggested the radical-molecule h-atom abstraction reaction ch3o + h2co → ch3oh + hco, in addit... | first experimental confirmation of the ch3o + h2co → ch3oh + hco reaction: expanding the ch3oh formation mechanism in interstellar ices |
the esa ariel mission has been adopted for launch in 2029 and will conduct a survey of around 1000 exoplanetary atmospheres during its primary mission life. by providing homogeneous data sets with a high signal-to-noise ratio and wide wavelength coverage, ariel will unveil the atmospheric demographics of these faraway ... | the ariel target list: the impact of tess and the potential for characterizing multiple planets within a system |
within the next decade, atmospheric o2 on earth-like m-dwarf planets may be accessible with visible-near-infrared (nir), high-spectral-resolution, ground-based extremely large telescope (elt) instruments. however, the prospects for using elts to detect environmental properties that provide context for o2 have not been ... | there's more to life than o2: simulating the detectability of a range of molecules for ground-based, high-resolution spectroscopy of transiting terrestrial exoplanets |
young transiting exoplanets (<100 myr) provide crucial insight into atmospheric evolution via photoevaporation. however, transmission spectroscopy measurements to determine atmospheric composition and mass loss are challenging due to the activity and prominent stellar disk inhomogeneities present on young stars. we ... | h-alpha and ca ii infrared triplet variations during a transit of the 23 myr planet v1298 tau c |
we present a volume-limited, spectroscopically verified sample of m7-l5 ultracool dwarfs (ucds) within 25 pc. the sample contains 410 sources, of which 93% have trigonometric distance measurements (80% from gaia dr2) and 81% have low-resolution (r ∼ 120), near-infrared (nir) spectroscopy. we also present an additional ... | the ultracool spextroscopic survey. i. volume-limited spectroscopic sample and luminosity function of m7-l5 ultracool dwarfs |
we present an atmospheric characterization study of two medium-sized planets bracketing the radius of neptune: hd 106315c (rp = 4.98 ± 0.23 r⊕) and hd 3167c ( ${r}_{{\rm{p}}}={2.740}_{-0.100}^{+0.106}$ r⊕). we analyze spatially scanned spectroscopic observations obtained with the g141 grism (1.125-1.650 μm) of the wide... | ares iv: probing the atmospheres of the two warm small planets hd 106315c and hd 3167c with the hst/wfc3 camera |
the astronomical gas-phase detection of simple species and small organic molecules in cold pre-stellar cores, with abundances as high as ∼10-8-10-9 n h, contradicts the generally accepted idea that at 10 k, such species should be fully frozen out on grain surfaces. a physical or chemical mechanism that results in a net... | reactive desorption of co hydrogenation products under cold pre-stellar core conditions |
context. to model the cold dust emission observed in the diffuse interstellar medium, in dense molecular clouds or in cold clumps that could eventually form new stars, it is mandatory to know the physical and spectroscopic properties of this dust and to understand its emission.aims: this work is a continuation of previ... | low-temperature mir to submillimeter mass absorption coefficient of interstellar dust analogues. ii. mg and fe-rich amorphous silicates |
the james webb space telescope (jwst) near-infrared camera has been found to exhibit serious wisp-like structures in four of its eight short-wavelength detectors. the exact structure and strength of these wisps is highly variable with the position and orientation of jwst, so the use of static templates is non-optimal. ... | dynamic wisp removal in jwst nircam images |
we present an overview of the cmzoom survey and its first data release. cmzoom is the first blind, high-resolution survey of the central molecular zone (cmz; the inner 500 pc of the milky way) at wavelengths sensitive to the pre-cursors of high-mass stars. cmzoom is a 550 hr large program on the submillimeter array tha... | cmzoom: survey overview and first data release |
we present spitzer follow-up imaging of 95 candidate extremely cold brown dwarfs discovered by the backyard worlds: planet 9 citizen science project, which uses visually perceived motion in multiepoch wide-field infrared survey explorer (wise) images to identify previously unrecognized substellar neighbors to the sun. ... | spitzer follow-up of extremely cold brown dwarfs discovered by the backyard worlds: planet 9 citizen science project |
we present the results from four stellar occultations by (486958) arrokoth, the flyby target of the new horizons extended mission. three of the four efforts led to positive detections of the body, and all constrained the presence of rings and other debris, finding none. twenty-five mobile stations were deployed for 201... | size and shape constraints of (486958) arrokoth from stellar occultations |
direct imaging allows for the detection and characterization of exoplanets via their thermal emission. we report the discovery via imaging of a young jovian planet in a triple-star system and characterize its atmospheric properties through near-infrared spectroscopy. the semimajor axis of the planet is closer relative ... | direct imaging discovery of a jovian exoplanet within a triple-star system |
in molecular clouds at temperatures as low as 10 k, all species except hydrogen and helium should be locked in the heterogeneous ice on dust grain surfaces. nevertheless, astronomical observations have detected over 150 different species in the gas phase in these clouds. the mechanism by which molecules are released fr... | an infrared measurement of chemical desorption from interstellar ice analogues |
we present the combination of the canada-france-hawaii telescope (chft) large area u-bands deep survey (clauds) and the hyper-suprime-cam (hsc) subaru strategic program (hsc-ssp) data over their four deep fields. we provide photometric catalogs for u, u* (cfht-megacam), g, r, i, z, and y (subaru-hsc) bands over ~20 deg... | combining the clauds and hsc-ssp surveys. u + grizy(+yjhks) photometry and photometric redshifts for 18m galaxies in the 20 deg2 of the hsc-ssp deep and ultradeep fields |
context. a complex environment exists in the inner few astronomical units of planet-forming disks. high-angular-resolution observations play a key role in our understanding of the disk structure and the dynamical processes at work.aims: in this study we aim to characterize the mid-infrared brightness distribution of th... | the asymmetric inner disk of the herbig ae star hd 163296 in the eyes of vlti/matisse: evidence for a vortex? |
we present a new derivation of the milky way's current star formation rate (sfr) based on the data of the herschel infrared galactic plane survey (hi-gal). we estimate the distribution of the sfr across the galactic plane from the star-forming clumps identified in the hi-gal survey and calculate the total sfr from the ... | the star formation rate of the milky way as seen by herschel |
we describe the data processing of the survey on extragalactic magnetism with sofia (salsa legacy program). this first data release presents 33% (51.34 hr out of 155.7 hr, including overheads) of the total awarded time from 2020 january to 2021 december. our observations were performed using the newly implemented on-th... | extragalactic magnetism with sofia (salsa legacy program). iii. first data release and on-the-fly polarization mapping characterization |
correct estimates of stellar extreme ultraviolet (euv; 100-1170 å) flux are important for studying the photochemistry and stability of exoplanet atmospheres, as euv radiation ionizes hydrogen and contributes to the heating, expansion, and potential escape of a planet’s upper atmosphere. contamination from interstellar ... | predicting the extreme ultraviolet radiation environment of exoplanets around low-mass stars: gj 832, gj 176, and gj 436 |
we obtained high-resolution spectra of the ultracool m-dwarf trappist-1 during the transit of its planet "b" using two high-dispersion near-infrared spectrographs, the infrared doppler (ird) instrument on the subaru 8.2m telescope, and the habitable zone planet finder (hpf) instrument on the 10 m hobby-eberly telescope... | nondetection of helium in the upper atmospheres of trappist-1b, e, and f |
interferometric methods form the basis of highly sensitive measurement techniques from astronomy to bioimaging. interferometry typically requires high stability between the measured and reference beams. the presence of rapid phase fluctuations washes out interference fringes, making phase profile recovery impossible. t... | noise-resistant phase imaging with intensity correlation |
as of yet, unexamined aluminum bearing molecules may help elucidate aluminum chemistry and associated refractory atom reactions in the interstellar medium. the flexibility of modern quantum chemistry in the construction and analysis of novel molecules makes it perfectly suited to analyze molecules of astrochemical sign... | spectroscopic investigation of [al,n,c,o] refractory molecules |
the formation of filaments in molecular clouds is an important process in star formation. hub-filament systems (hfss) are a transition stage connecting parsec-scale filaments and protoclusters. understanding the origin of hfss is crucial to reveal how star formation proceeds from clouds to cores. here we report james c... | formation of the hub-filament system g33.92+0.11: local interplay between gravity, velocity, and magnetic field |
we have developed a new method for using the observed starlight polarization and polarized submillimeter emission to constrain the shapes and porosities of interstellar grains. we first present the modified picket-fence approximation and verify that it is sufficiently accurate for modeling starlight polarization. we th... | using the starlight polarization efficiency integral to constrain shapes and porosities of interstellar grains |
context. the methyl cation (ch3+) has recently been discovered in the interstellar medium through the detection of 7 μm (1400 cm−1) features toward the d203-506 protoplanetary disk by the jwst. line-by-line spectroscopic assignments of these features, however, were unsuccessful due to complex intramolecular perturbatio... | astronomical ch3+ rovibrational assignments. a combined theoretical and experimental study validating observational findings in the d203-506 uv-irradiated protoplanetary disk |
carmenes, the brand-new, spanish-german, two-channel, ultra-stabilised, high-resolution spectrograph at the 3.5 m calar alto telescope, started its science survey on 01 jan 2016. in one shot, it covers from 0.52 to 1.71 μm with resolution r = 94,600 (λ < 0.96 μm) and 80,400 (λ > 0.96 μm). during guaranteed time o... | carmencita, the carmenes input catalogue of bright, nearby m dwarfs |
the death of massive stars is believed to involve aspheric explosions initiated by the collapse of an iron core. the specifics of these catastrophic explosions remain uncertain, due partly to limited observational constraints on asymmetries deep inside the star. here we present near-infrared observations of the young s... | the bubble-like interior of the core-collapse supernova remnant cassiopeia a |
we study the morphology of the stellar periphery of the magellanic clouds in search of substructure using near-infrared imaging data from the visible and infrared survey telescope for astronomy hemisphere survey. based on the selection of different stellar populations using the (j - ks, ks) colour-magnitude diagram, we... | stellar substructures in the periphery of the magellanic clouds with the vista hemisphere survey from the red clump and other tracers |
the cluster westerlund 1 (wd1) is host to a large variety of post-main-sequence (ms) massive stars. the simultaneous presence of these stars can only be explained by stellar models if the cluster has a finely tuned age of 4-5 myr, with several published studies independently claiming ages within this range. at this age... | the age of westerlund 1 revisited |
mid-infrared spectroscopy is one of the few ways to observe the composition of the terrestrial planet-forming zone, the inner few astronomical units, of protoplanetary disks. the species currently detected in the disk atmosphere, for example, co, co2, h2o, and c2h2, are theoretically enough to constrain the c/o ratio o... | water uv-shielding in the terrestrial planet-forming zone: implications from water emission |
we present a transmission spectrum for the warm (500-600 k) sub-neptune hd 3167c obtained using the hubble space telescope wide field camera 3 infrared spectrograph. we combine these data, which span the 1.125-1.643 μm wavelength range, with broadband transit measurements made using kepler/k2 (0.6-0.9 μm) and spitzer/i... | transmission spectroscopy for the warm sub-neptune hd 3167c: evidence for molecular absorption and a possible high-metallicity atmosphere |
we apply a new deep learning technique to detect, classify, and deblend sources in multiband astronomical images. we train and evaluate the performance of an artificial neural network built on the mask region-based convolutional neural network image processing framework, a general code for efficient object detection, c... | deblending and classifying astronomical sources with mask r-cnn deep learning |
a new silicon monoxide (28si16o) line list covering infrared, visible, and ultraviolet regions called siouvenir is presented. this line list extends the infrared ebjt exomol line list by including vibronic transitions to the $a\, {}^{1}\pi$ and $e\, {}^{1}\sigma ^{+}$ electronic states. strong perturbations to the $a\,... | exomol line lists - xliv. infrared and ultraviolet line list for silicon monoxide (28si16o) |
context. hr8799 is orbited by at least four giant planets, making it a prime target for the recently commissioned spectro-polarimetric high-contrast exoplanet research (vlt/sphere). as such, it was observed on five consecutive nights during the sphere science verification in december 2014.aims: we aim to take full adva... | vlt/sphere robust astrometry of the hr8799 planets at milliarcsecond-level accuracy. orbital architecture analysis with pyastrofit |
we present wisea j114724.10-204021.3, a young, low-mass, high-probability member of the tw hya association (twa). wisea j114724.10-204021.3 was discovered based on its red allwise color (w1 - w2 = 0.63 mag) and extremely red 2mass j - k s color (>2.64 mag), the latter of which is confirmed with near-infrared photome... | wisea j114724.10-204021.3: a free-floating planetary mass member of the tw hya association |
we present an overview and first results of the stratospheric observatory for infrared astronomy massive (soma) star formation survey, which is using the forcast instrument to image massive protostars from ∼10 to 40 μm. these wavelengths trace thermal emission from warm dust, which in core accretion models mainly emerg... | the sofia massive (soma) star formation survey. i. overview and first results |
hgcdte (mct) is a very versatile material system for infrared (ir) detection, suitable for high performance detection in a wide range of applications and spectral ranges. indeed, the ability to tailor the cutoff frequency as close as possible to the needs makes it a perfect candidate for high performance detection. mor... | hgcdte detectors for space and science imaging: general issues and latest achievements |
context. orion a hosts the nearest massive star factory, thus offering a unique opportunity to resolve the processes connected with the formation of both low- and high-mass stars. here we present the most detailed and sensitive near-infrared (nir) observations of the entire molecular cloud to date.aims: with the unique... | vision - vienna survey in orion. i. vista orion a survey |
focusing on the organic inventory of regions of star and planet formation in the interstellar medium of galaxies, this comprehensive overview of the molecular universe is an invaluable reference source for advanced undergraduates through to entry-level researchers. it includes an extensive discussion of microscopic phy... | molecular astrophysics |
the origins space telescope mission concept includes an exoplanet transit spectrometer that requires detector arrays with ultrahigh pixel-to-pixel stability. superconducting nanowire single-photon detectors, or snspds, have the potential to meet these stringent stability requirements due to their digital-like output. t... | recent advances in superconducting nanowire single-photon detector technology for exoplanet transit spectroscopy in the mid-infrared |
aims: hd 142527 is one of the most frequently studied herbig ae/be stars with a transitional disk that hosts a large cavity that is up to about 100 au in radius. for this reason, it has been included in the guaranteed time observation (gto) sphere infrared survey for exoplanets (shine) as part of the spectro-polarimetr... | sphere dynamical and spectroscopic characterization of hd 142527b |
hr4796a hosts a well-studied debris disk with a long history due to its high fractional luminosity and favorable inclination, which facilitate both unresolved and resolved observations. we present new j- and k1-band images of the resolved debris disk hr4796a taken in the polarimetric mode of the gemini planet imager (g... | multiband polarimetric imaging of hr 4796a with the gemini planet imager |
thermal phase curves of short-period exoplanets provide the best constraints on the atmospheric dynamics and heat transport in their atmospheres. the published spitzer space telescope phase curve of 55 cancri e, an ultra-short-period super-earth, exhibits a large phase offset suggesting significant eastward heat recirc... | revisiting the iconic spitzer phase curve of 55 cancri e: hotter dayside, cooler nightside, and smaller phase offset |
arsenic doped back illuminated blocked impurity band (bibib) silicon detectors have advanced near and mid-ir astronomy for over thirty years; they have high quantum efficiency (qe), especially at wavelengths longer than 10 μm, and a large spectral range. their radiation hardness is also an asset for space based instrum... | the quantum efficiency and diffractive image artifacts of si:as ibc mid-ir detector arrays at 5-10 μm: implications for the jwst/miri detectors |
context. complex organic molecules (coms) have been identified toward high- and low-mass protostars as well as molecular clouds, suggesting that these interstellar species originate from the early stage(s) of starformation. the reaction pathways resulting in coms described by the formula c2hno, such as acetaldehyde (ch... | formation of complex molecules in translucent clouds: acetaldehyde, vinyl alcohol, ketene, and ethanol via "nonenergetic" processing of c2h2 ice |
after a successful launch, the james webb space telescope is preparing to undertake one of its principal mission objectives, the characterization of the atmospheres of exoplanets. the single object slitless spectroscopy (soss) mode of the near infrared imager and slitless spectrograph (niriss) is the only observing mod... | atoca: an algorithm to treat order contamination. application to the niriss soss mode |
the soss mode of the near infrared imager and slitless spectrograph instrument is poised to be one of the workhorse modes for exoplanet atmosphere observations with the newly launched james webb space telescope (jwst). one of the challenges of the soss mode, however, is the physical overlap of the first two diffraction... | applesoss: a producer of profiles for soss. application to the niriss soss mode |
a first look is taken at the nirspec 1-5 μm observations from james webb space telescope program 1591 that targets seven objects along the low-mass stellar life cycle with polycyclic aromatic hydrocarbon (pah) emission. spectra extracted from a 1.″5 radius circular aperture are explored, showing a wealth of features, i... | jwst: deuterated pahs, pah nitriles, and pah overtone and combination bands. i. program description and first look |
galaxy interactions distort the distribution of baryonic matter and can affect star formation. the nearby magellanic clouds are a prime example of an ongoing galaxy interaction process. here, we use the intermediate-age (∼1-10 gyr) red clump (rc) stars to map the 3d structure of the small magellanic cloud (smc) and int... | the vmc survey - xl. three-dimensional structure of the small magellanic cloud as derived from red clump stars |
we produce radiation hydrodynamics models of an active galactic nucleus torus plus outflow on 1-100 pc scales. this large scale permits direct comparison with observations, provides justification for configurations used in radiation transfer models, and tests the sensitivity of results of smaller scale dynamical models... | radiation hydrodynamics models of active galactic nuclei: beyond the central parsec |
the presence of phosphine (ph3) in the atmosphere of venus was reported by greaves et al. (2021, https://doi.org/10.1038/s41550-020-1174-4), based on observations of the j = 1-0 transition at 267 ghz using ground-based, millimeter-wave spectroscopy. this unexpected discovery presents a challenge for our understanding o... | phosphine in the venusian atmosphere: a strict upper limit from sofia great observations |
a complete census of dusty star-forming galaxies (dsfgs) at early epochs is necessary to constrain the obscured contribution to the cosmic star formation rate density (csfrd); however, dsfgs beyond z ~ 4 are both rare and hard to identify from photometric data alone due to degeneracies in submillimeter photometry with ... | searching far and long. i. pilot alma 2 mm follow-up of bright dusty galaxies as a redshift filter |
the equatorial ring of supernova (sn) 1987a has been exposed to forward shocks from the sn blast wave, and it has been suggested that these forward shocks have been causing ongoing destruction of dust in the ring. we obtained stratospheric observatory for infrared astronomy the faint object infrared camera for the sofi... | sofia mid-infrared observations of supernova 1987a in 2016 - forward shocks and possible dust re-formation in the post-shocked region |
we present a new methodology for simulating mid-infrared emission from polycyclic aromatic hydrocarbons (pahs) in galaxy evolution simulations. to do this, we combine theoretical models of pah emission features as they respond to varying interstellar radiation fields, grain-size distributions, and ionization states wit... | a framework for modeling polycyclic aromatic hydrocarbon emission in galaxy evolution simulations |
we present a dust spectral energy distribution (sed) and binary stellar population analysis revisiting the dust production rates (dprs) in the winds of carbon-rich wolf-rayet (wc) binaries and their impact on galactic dust budgets. dustem sed models of 19 galactic wc "dustars" reveal dprs of ${\dot{m}}_{d}\sim {10}^{-1... | revisiting the impact of dust production from carbon-rich wolf-rayet binaries |
this is the second in a series of papers devoted to exploring a set of six dusty models of active galactic nuclei (agn) with available spectral energy distributions. these models are the smooth torus by fritz et al., the clumpy torus by nenkova et al., the clumpy torus by hönig & kishimoto, the two-phase torus by s... | exploring the mid-infrared seds of six agn dusty torus models. ii. the data |
here we present new, yet final, mid-infrared (mid-ir) data for supernovae (sne) based on measurements with the spitzer space telescope. comparing our recent 3.6 and 4.5 μm photometry with previously published mid-ir and further multiwavelength data sets, we were able to draw some conclusions about the origin and heatin... | spitzer's last look at extragalactic explosions: long-term evolution of interacting supernovae |
kernel phase imaging (kpi) enables the direct detection of substellar companions and circumstellar dust close to and below the classical (rayleigh) diffraction limit. the high-strehl full pupil images provided by the james webb space telescope (jwst) are ideal for application of the kpi technique. we present a kernel p... | the near infrared imager and slitless spectrograph for jwst. v. kernel phase imaging and data analysis |
we present the performance of the upgreat heterodyne array receivers on the sofia telescope after several years of operations. this instrument is a multi-pixel high resolution (r≳107) spectrometer for the stratospheric observatory for far-infrared astronomy (sofia). the receivers use 7-pixel subarrays configured in a h... | the upgreat dual frequency heterodyne arrays for sofia |
quantifying the evolution of stellar extreme ultraviolet (euv, 100-1000 å) emission is critical for assessing the evolution of planetary atmospheres and the habitability of m dwarf systems. previous studies from the habitable zones and m dwarf activity across time (hazmat) program showed the far- and near-uv (fuv, nuv)... | hazmat vi: the evolution of extreme ultraviolet radiation emitted from early m stars |
cosmic dawn intensity mapper is a "probe class" mission concept for reionization studies of the universe. it will be capable of spectroscopic imaging observations between 0.7 to 6-7 microns in the near-infrared. the primary observational objective is pioneering observations of spectral emission lines of interest throug... | cosmic dawn intensity mapper |
the herschel astrophysical terahertz large area survey (h-atlas) is a survey of 660 deg2 with the pacs and spire cameras in five photometric bands: 100, 160, 250, 350, and 500 μm. this is the second of three papers describing the data release for the large fields at the south and north galactic poles (ngp and sgp). in ... | the herschel-atlas data release 2. paper ii. catalogs of far-infrared and submillimeter sources in the fields at the south and north galactic poles |
we present a detailed analysis of a large sample of spectroscopically confirmed massive quiescent galaxies (mqgs; log(m */m ⊙) ∼ 11.5) at z ≳ 2. this sample comprises 15 galaxies selected in the cosmos and uds fields by their bright k-band magnitudes and followed up with very large telescope (vlt) x-shooter spectroscop... | x-shooter spectroscopy and hst imaging of 15 massive quiescent galaxies at z ≳ 2 |
the survey for dust in nearby galaxies with spitzer (dustings) identified several candidate asymptotic giant branch (agb) stars in nearby dwarf galaxies and showed that dust can form even in very metal-poor systems ({\boldsymbol{z}}∼ 0.008 {z}⊙ ). here, we present a follow-up survey with wfc3/ir on the hubble space tel... | an infrared census of dust in nearby galaxies with spitzer (dustings). iv. discovery of high-redshift agb analogs |
context. the sao 206462 (hd 135344b) disk is one of the few known transitional disks showing asymmetric features in scattered light and thermal emission. near-infrared scattered-light images revealed two bright outer spiral arms and an inner cavity depleted in dust. giant protoplanets have been proposed to account for ... | testing giant planet formation in the transitional disk of sao 206462 using deep vlt/sphere imaging |
nirspec is a 1-5 um echelle spectrograph in use on the keck ii telescope since 1999. the spectrograph is capable of both moderate (r=λ/▵λ 2000) and high (r 25,000) resolution observations and has been a workhorse instrument across many astronomical fields, from planetary science to extragalactic observations. in the la... | an overview of the nirspec upgrade for the keck ii telescope |
far-infrared dust polarimetry enables the study of interstellar magnetic fields via tracing of the polarized emission from dust grains that are partially aligned with the direction of the field. the advent of high-quality polarimetric data has permitted the use of statistical methods to extract both the direction and m... | maps of magnetic field strength in the omc-1 using hawc+ fir polarimetric data |
we explore evolution in the dust-to-gas ratio with density within four well-resolved local group galaxies-the lmc, smc, m31, and m33. we do this using new herschel maps, which restore extended emission that was missed by previous herschel reductions. combining this sensitivity to diffuse dust emission with excellent ph... | the quest for the missing dust. ii. two orders of magnitude of evolution in the dust-to-gas ratio resolved within local group galaxies |
whilst young massive clusters (ymcs; m ≳ 104 m⊙, age ≲ 100 myr) have been identified in significant numbers, their progenitor gas clouds have eluded detection. recently, four extreme molecular clouds residing within 200 pc of the galactic centre have been identified as having the properties thought necessary to form ym... | tracing the conversion of gas into stars in young massive cluster progenitors |
extragalactic astronomy relies on the accurate estimation of source photometry corrected for milky way dust extinction. this has motivated the creation of a number of “galactic” dust maps. we investigate whether these maps are contaminated by extragalactic signals using the clustering-redshift technique, i.e., by measu... | extragalactic imprints in galactic dust maps |
we present the discovery of an 18.5 ± 0.5 mjup brown dwarf (bd) companion to the m0v star toi-1278. the system was first identified through a percent-deep transit in transiting exoplanet survey satellite photometry; further analysis showed it to be a grazing transit of a jupiter-sized object. radial velocity (rv) follo... | toi-1278 b: spirou unveils a rare brown dwarf companion in close-in orbit around an m dwarf |
aims: various galaxy classification schemes have been developed so far to constrain the main physical processes regulating evolution of different galaxy types. in the era of a deluge of astrophysical information and recent progress in machine learning, a new approach to galaxy classification has become imperative.metho... | the vimos public extragalactic redshift survey (vipers). the complexity of galaxy populations at 0.4 < z < 1.3 revealed with unsupervised machine-learning algorithms |
we have developed a passive 350 ghz (850 μm) video-camera to demonstrate lumped element kinetic inductance detectors (lekids)—designed originally for far-infrared astronomy—as an option for general purpose terrestrial terahertz imaging applications. the camera currently operates at a quasi-video frame rate of 2 hz with... | a passive terahertz video camera based on lumped element kinetic inductance detectors |
context. the simultaneous detection of organic molecules of the form c2hno, such as ketene (ch2co), acetaldehyde (ch3cho), and ethanol (ch3ch2oh), toward early star-forming regions offers hints of a shared chemical history. several reaction routes have been proposed and experimentally verified under various interstella... | formation of complex organic molecules in molecular clouds: acetaldehyde, vinyl alcohol, ketene, and ethanol via the "energetic" processing of c2h2 ice |
the m3v dwarf star l 98-59 hosts three small (r < 1.6 r⊕) planets. the host star is bright (k = 7.1) and nearby (10.6 pc), making the system a prime target for follow-up characterization with the hubble space telescope (hst) and the upcoming james webb space telescope (jwst). herein, we use simulated transmission sp... | l 98-59: a benchmark system of small planets for future atmospheric characterization |
the james webb space telescope miri instrument will revolutionize extragalactic astronomy with unprecedented sensitivity and angular resolution in mid-ir. here we assess the potential of miri photometry to constrain galaxy properties in the cosmic evolution early release science (ceers) survey. we derive estimated miri... | jwst/miri simulated imaging: insights into obscured star formation and agns for distant galaxies in deep surveys |
in 2019, sgr a*-the supermassive black hole in the galactic center-underwent unprecedented flaring activity in the near-infrared (nir), brightening by up to a factor of 100 compared to quiescent values. here we report atacama large millimeter/submillimeter array (alma) observations of sgr a*'s continuum variability at ... | second-scale submillimeter variability of sagittarius a* during flaring activity of 2019: on the origin of bright near-infrared flares |
context. fs canis majoris (fs cma, hd 45677) is an unclassified b[e] star surrounded by an inclined dust disk. the evolutionary stage of fs cma is still debated. perpendicular to the circumstellar disk, a bipolar outflow was detected. infrared aperture-synthesis imaging provides us with a unique opportunity to study th... | vlti-matisse l- and n-band aperture-synthesis imaging of the unclassified b[e] star fs canis majoris |
individual chemical abundances for 14 elements (c, o, na, mg, al, si, k, ca, ti, v, cr, mn, fe, and ni) are derived for a sample of m dwarfs using high-resolution, near-infrared h-band spectra from the sloan digital sky survey-iv/apache point observatory galactic evolution experiment (apogee) survey. the quantitative a... | detailed chemical abundances for a benchmark sample of m dwarfs from the apogee survey |
far-infrared astronomy has advanced rapidly since its inception in the late 1950s, driven by a maturing technology base and an expanding community of researchers. this advancement has shown that observations at far-infrared wavelengths are important in nearly all areas of astrophysics, from the search for habitable pla... | review: far-infrared instrumentation and technological development for the next decade |
herein, we describe the design, implementation and operation principles of an astronomical camera system, based on a large-format ccd261-84 detector with an extremely thick 200 μm substrate. the dinacon-v controller was used with the ccd to achieve high performance and low noise. the ccd system photometric characterist... | astronomical camera based on a ccd261-84 detector with increased sensitivity in the near-infrared |
context. aminoacetonitrile, a molecule detected in the interstellar medium only toward the star-forming region sagittarius b2 (sgr b2), is considered an important prebiotic species; in particular, it is a possible precursor of the simplest amino acid glycine. to date, observations have been limited to ground state emis... | far-infrared laboratory spectroscopy of aminoacetonitrile and first interstellar detection of its vibrationally excited transitions |
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