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while β pic is known to host silicates in ring-like structures, whether the properties of these silicate dust vary with stellocentric distance remains an open question. we re-analyze the β pictoris debris disk spectrum from the spitzer infrared spectrograph (irs) and a new infrared telescope facility spectrograph and i... | trends in silicates in the β pictoris disk |
we examine the near-infrared (nir) emission from low-luminosity active galactic nuclei (llagns). our galaxy sample includes 15 objects with detected 2-10 kev x-ray emission, dynamical black hole mass estimates from the literature, and available gemini/nifs integral field spectroscopy data. we find evidence for red cont... | surprisingly strong k-band emission found in low-luminosity active galactic nuclei |
context. fuors outbursts are a crucial stage of accretion in young stars. however, a complete mechanism at the origin of the outburst still remains missing.aims: we aim to constrain the instability mechanism in the star fu orionis itself by directly probing the size and evolution in time of the outburst region with nea... | fu orionis disk outburst: evidence for a gravitational instability scenario triggered in a magnetically dead zone |
astronomical infrared spectral features at ~6.6, 9.8 and 20 micronm have recently been suggested as being due to the planar graphene form of c24 carbon cluster. here we report density functional theory and coupled cluster calculations on wavefunctions stability, relative energies, and infrared spectra of four different... | a theoretical investigation of the possible detection of c24 in space |
the atmospheric precipitable water vapour content (pwv) strongly affects astronomical observations in the infrared (ir). we have validated the weather research and forecasting (wrf) mesoscale numerical weather prediction (nwp) model as an operational forecasting tool for pwv. in the validation, we used atmospheric radi... | forecasting the precipitable water vapour content: validation for astronomical observatories using radiosoundings |
the gimballed limb observer for radiance imaging of the atmosphere (gloria) is an infrared imaging fts (fourier transform spectrometer) with a 2-d infrared detector that is operated on two high-flying research aircraft. it has flown on eight campaigns and measured along more than 300 000 km of flight track. this paper ... | quantification and mitigation of the instrument effects and uncertainties of the airborne limb imaging ftir gloria |
we observed the nearly edge-on debris disk system hd 111520 at the hj and k1 near-infrared (nir) bands using both the spectral and polarization modes of the gemini planet imager. with these new observations, we have performed an empirical analysis in order to better understand the disk morphology and its highly asymmet... | a multiwavelength study of the highly asymmetrical debris disk around hd 111520 |
the interstellar medium (ism) is typically a hostile environment: cold, dilute and irradiated. nevertheless, it appears very fertile for molecules. the localized heating resulting from turbulence dissipation is a possible channel to produce and excite molecules. however, large-scale simulations cannot resolve the dissi... | production and excitation of molecules by dissipation of two-dimensional turbulence |
growing astronomical interest in phosphorous (p) chemistry is stimulating the search for new interstellar p-bearing molecules, a task requiring detailed knowledge of the microwave and infrared molecular spectrum. in this work, we present comprehensive rotation-vibration line lists of the cis- and trans-isomers of dipho... | theoretical rotation-vibration spectroscopy of cis- and trans-diphosphene (p2h2) and the deuterated species p2hd |
to increase the sample size of future atmospheric characterization efforts, we build on the planetary infrared excess (pie) technique that has been proposed as a means to detect and characterize the thermal spectra of transiting and non-transiting exoplanets using sufficiently broad wavelength coverage to uniquely cons... | retrieving exoplanet atmospheres using planetary infrared excess: prospects for the night side of wasp-43 b and other hot jupiters |
the 3.3 μm unidentified infrared emission feature is commonly attributed to the c-h stretching band of aromatic molecules. astronomical observations have shown that this feature is composed of two separate bands at 3.28 and 3.30 μm, and the origin of these two bands is unclear. in this paper, we perform vibrational ana... | on the origin of the 3.3 μm unidentified infrared emission feature |
(349) dembowska is a large, bright main-belt asteroid that has a fast rotation and an oblique spin axis. it might have experienced partial melting and differentiation. we constrain dembowska's thermophysical properties, such as thermal inertia, roughness fraction, geometric albedo and effective diameter within 3σ uncer... | thermophysical characteristics of the large main-belt asteroid (349) dembowska |
we utilize the ability of the hubble space telescope to probe near-infrared water absorption present in the atmosphere of low-mass stars and brown-dwarf and planetary-mass objects to create a pure sample of orion nebula cluster (onc) members, not affected by contamination from background stars and galaxies that lack wa... | hst survey of the orion nebula cluster in the h2o 1.4 μm absorption band. ii. the substellar imf down to planetary masses |
at wavelengths between 0.15 and 0.19 μm, the far-ultraviolet spectrum of jupiter is dominated by the scattered solar spectrum, attenuated by molecular absorptions primarily by acetylene and ethane, and to a lesser extent ammonia and phosphine. we describe the development of our radiative transfer code that enables the ... | jupiter in the ultraviolet: acetylene and ethane abundances in the stratosphere of jupiter from cassini observations between 0.15 and 0.19 μm |
the study of the aromatic infrared bands (aibs) in astronomical environments has opened interesting spectroscopic questions on the effect of anharmonicity on the infrared (ir) spectrum of hot polycyclic aromatic hydrocarbons (pahs) and related species in isolated conditions. the forthcoming james webb space telescope w... | anharmonic infrared spectra of thermally excited pyrene (c16h10): a combined view of dft-based gvpt2 with anharmoniccaos, and approximate dft molecular dynamics with demonnano |
young massive stars influence their surroundings from local to galactic scales, but the observational challenges associated with their distance and embedded nature has, until the recent decade, made high-resolution studies of these objects difficult. in particular, comparative analyses of massive young stellar object (... | tying the geometrical traits of massive young stellar objects and their disks to a potential evolutionary sequence using infrared observations |
we present mid-infrared imaging of two young clusters, the coronet in the cra cloud core and b 59 in the pipe nebula, using the forcast camera on the stratospheric observatory for infrared astronomy. we also analyze herschel space observatory4 pacs and spire images of the associated clouds. the two clusters are at simi... | forcast imaging of two small nearby clusters: the coronet and b 59 |
owing to the recent identification of major substructures in our milky way (mw), the astronomical community has started to reevaluate the importance of dissolved and existing dwarf galaxies. in this work, we investigate up to 13 elements in 43 giant stars of the sculptor dwarf galaxy (scl) using high-signal-to-noise-ra... | near-infrared chemical abundances of stars in the sculptor dwarf galaxy |
aims: we aim to investigate how polarimetric observations can improve our understanding of the nature and diversity of m/x-type asteroids.methods: polarimetric observations of the selected m/x-type asteroids were carried out at the tohoku 0.6-m telescope at haleakala observatory, hawaii (simultaneously in bvr filters),... | polarimetry of m-type asteroids in the context of their surface composition |
we present medium-resolution near-infrared (nir) spectra, covering 1.1-3.4 μm, of the normal type ia supernova (sn ia) sn 2014j in m82 obtained with the flitecam instrument on board stratospheric observatory for infrared astronomy (sofia) between 17 and 26 days after maximum b light. our 2.8-3.4 μm spectra may be the f... | observations of type ia supernova 2014j with flitecam/sofia |
the pre-transitional disk around the herbig ae star hd 169142 shows a complex structure of possible ongoing planet formation in dust thermal emission from the near-infrared (ir) to millimeter wavelength range. also, a distinct set of broad emission features at 3.3, 6.2, 7.7, 8.6, 11.3, and 12.7 μ {{m}}, commonly attrib... | dust and polycyclic aromatic hydrocarbon in the pre-transitional disk around hd 169142 |
context. wr104 is an emblematic dusty wolf-rayet star and the prototypical member of a sub-group hosting spirals that are mainly observable with high-angular resolution techniques. previous aperture masking observations showed that wr104 is likely to be an interacting binary star at the end of its life. however, severa... | sphere view of wolf-rayet 104. direct detection of the pinwheel and the link with the nearby star |
in this article, we present the first results ever obtained by applying the autoregressive (ar) technique to precipitable water vapour (pwv). the study is performed at the very large telescope (vlt). the ar technique was proposed recently to provide forecasts of atmospheric and astroclimatic parameters on short time-sc... | high-accuracy short-term precipitable water-vapour operational forecast at the very large telescope and perspectives for sky background forecast |
context. the observed orbital characteristics of post-asymptotic giant branch and post-red giant branch (post-rgb) binaries are not understood. we suspect that the missing ingredients needed to explain them probably lie in the continuous interaction of the central binary with its circumstellar environment.aims: we aim ... | vlti/pionier reveals the close environment of the evolved system hd 101584 |
we investigate the infrared properties of asymptotic giant branch (agb) stars in our galaxy and the magellanic clouds using various infrared observational data and theoretical models. we use catalogs for the sample of 4996 agb stars in our galaxy and about 39,000 agb stars in the magellanic clouds from the available li... | infrared properties of asymptotic giant branch stars in our galaxy and the magellanic clouds |
we present the first complete, velocity-resolved [c ii] 158 μm image of the m51 grand-design spiral galaxy, observed with the upgraded german receiver for astronomy at terahertz frequencies instrument on the stratospheric observatory for infrared astronomy. [c ii] is an important tracer of various phases of the interst... | a sofia survey of [c ii] in the galaxy m51. ii. [c ii] and co kinematics across the spiral arms |
we present the results from an observing campaign to confirm the peculiar motion of the supermassive black hole (smbh) in j0437+2456 first reported in pesce et al. deep observations with the arecibo observatory have yielded a detection of neutral hydrogen (h i) emission, from which we measure a recession velocity of 49... | a restless supermassive black hole in the galaxy j0437+2456 |
an absorption feature is occasionally reported around 11 μm in astronomical spectra, including those of forming stars. candidate carriers include water ice, polycyclic aromatic hydrocarbons, silicon carbide, crystalline silicates or even carbonates. all are known constituents of cosmic dust in one or more types of envi... | absorption at 11 μm in the interstellar medium and embedded sources: evidence for crystalline silicates |
ground-based astronomical observations may be limited by telluric water vapor absorption, which is highly variable in time and significantly complicates both spectroscopy and photometry in the near-infrared (nir). to achieve the sensitivity required to detect earth-sized exoplanets in the nir, simultaneous monitoring o... | monitoring telluric absorption with camal |
we investigate properties of the interstellar medium (ism) interacting with shocks around the galactic supernova remnant ic 443, using the results of near-infrared [fe ii] and h2 line mapping with the infrared survey facility/simultaneous infrared imager for unbiased survey. in the present study, we newly performed h2 ... | near-infrared [ {fe} {ii} ] and h2 line mapping of the supernova remnant ic 443 with the irsf/sirius |
we present observations obtained with the 10 m keck telescopes of the forbidden so a1δ → x3σ- rovibronic transition at 1.707 μm on io while in eclipse. we show its spatial distribution at a resolution of ∼0"12 and a spectral resolution of r ∼ 2500, as well as disk-integrated spectra at a high spectral resolution (r ∼ 1... | high spatial and spectral resolution observations of the forbidden 1.707 μm rovibronic so emissions on io: evidence for widespread stealth volcanism |
the detailed magnetic field structure of the starless dense core cb81 (l1774, pipe 42) in the pipe nebula was determined based on near-infrared polarimetric observations of background stars to measure dichroically polarized light produced by magnetically aligned dust grains in the core. the magnetic fields pervading cb... | distortion of magnetic fields in the dense core cb81 (l1774, pipe 42) in the pipe nebula |
the search for life in the universe is currently focused on earth-analog planets. however, we should be prepared to find a diversity of terrestrial exoplanets not only in terms of host star but also in terms of surface environment. simulated high-resolution spectra of habitable planets covering a wide parameter space a... | high-resolution spectra for a wide range of habitable zone planets around sun-like stars |
hot atmospheres of massive galaxies are enriched with metals. elemental abundances measured in the x-ray band have been used to study the chemical enrichment of supernova remnants, elliptical galaxies, groups, and clusters of galaxies. here we measure the elemental abundances of the hot atmosphere of luminous infrared ... | elemental abundances of the hot atmosphere of luminous infrared galaxy arp 299 |
open clusters are central elements of our understanding of the galactic disc evolution, as an accurate determination of their parameters leads to an unbiased picture of our galaxy's structure. extending the analysis towards fainter magnitudes in cluster sequences has a significant impact on the derived fundamental para... | the vvv open cluster project. near-infrared sequences of ngc 6067, ngc 6259, ngc 4815, pismis 18, trumpler 23, and trumpler 20 |
by implementing a model of primordial dust emission, we predict dust-continuum fluxes for massive galaxy sources similar to those recently detected by james webb space telescope (jwst) at z ≳ 7. current upper flux limits, obtained with atacama large millimeter/submillimeter array (alma) for some of these sources, can c... | probing the nature of the first galaxies with jwst and alma |
we report the first direct measurement of the helium isotope ratio, 3he/4he, outside of the local interstellar cloud, as part of science-verification observations with the upgraded cryogenic infrared echelle spectrograph. our determination of 3he/4he is based on metastable he i* absorption along the line of sight towar... | primordial helium-3 redux: the helium isotope ratio of the orion nebula |
m82 is an archetypal starburst galaxy in the local universe. the central burst of star formation, thought to be triggered by m82's interaction with other members in the m81 group, is driving a multiphase galaxy-scale wind away from the plane of the disk that has been studied across the electromagnetic spectrum. here, w... | [c ii] spectral mapping of the galactic wind and starbursting disk of m82 with sofia |
the visions public survey provides large-scale, multi-epoch imaging of five nearby star-forming regions at sub-arcsecond resolution in the near-infrared. all data collected within the program and provided by the european southern observatory (eso) science archive are processed with a custom end-to-end pipeline infrastr... | visions: the vista star formation atlas. ii. the data processing pipeline |
we present deep, full-sky maps built from wide-field infrared survey explorer and neowise exposures spanning the 2010 january-2020 december time period. these coadds, which incorporate roughly 8 yr of w1 (3.4 μm) and w2 (4.6 μm) imaging, are the deepest ever full-sky maps at wavelengths of 3-5 μm. photometry based on t... | eight-year full-depth unwise coadds |
context. polycyclic aromatic hydrocarbons (pahs) are believed to be the carriers of the aromatic infrared bands and have been proposed as candidates to explain other astronomical phenomena such as diffuse interstellar bands (dibs). the first aromatic structures possessing more than one ring, 1- and 2-cyanonaphthalene (... | electronic spectroscopy of 1-cyanonaphthalene cation for astrochemical consideration |
the origin of the attenuation of starlight in diffuse clouds in interstellar space at specific wavelengths ranging from the visible to the near-infrared has been unknown since the first astronomical observations around a century ago. the absorption features, termed the diffuse interstellar bands, have subsequently been... | pathway to the identification of c>60+ in diffuse interstellar clouds |
since interstellar detection of propenal is only based on two rotational transitions in the centimeter wave region, its high resolution rotational spectrum has been measured up to 660 ghz and fully characterized by assignment of more than 12,000 transitions to provide direct laboratory data to the astronomical communit... | comprehensive analysis of prebiotic propenal up to 660 ghz |
we observed proxima centauri with the spitzer space telescope infrared array camera five times in 2016 and 2017 to search for transits of proxima centauri b. following standard analysis procedures, we found three asymmetric, transit-like events that are now understood to be vibrational systematics. this systematic is c... | identification and mitigation of a vibrational telescope systematic with application to spitzer |
we have performed a 5-8 μm spectral line survey of the hot molecular core associated with the massive protostar afgl 2591, using the echelon-cross-echelle spectrograph (exes) on board the stratospheric observatory for infrared astronomy (sofia). we have supplemented these data with a ground-based study in the atmospher... | infrared detection of abundant cs in the hot core afgl 2591 at high spectral resolution with sofia/exes |
sulfur has been observed to be severely depleted in dense clouds leading to uncertainty in the molecules that contain it and the chemistry behind their evolution. here, we aim to shed light on the sulfur chemistry in young stellar objects (ysos) by using high-resolution infrared spectroscopy of absorption by the ν 3 ro... | high-resolution sofia/exes spectroscopy of so2 gas in the massive young stellar object monr2 irs3: implications for the sulfur budget |
infrared hybridized detectors are widely used in astronomy, and their performance can be degraded by image persistence. this results in remnant images that can persist in the detector for many hours, contaminating any subsequent low-background observations. a different but related problem is reciprocity failure whereby... | predictive model of persistence in h2rg detectors |
spatially resolved maps of jupiter's far-infrared 17-37 μm hydrogen-helium collision-induced spectrum were acquired by the forcast instrument on the stratospheric observatory for infrared astronomy (sofia) in may 2014. spectral scans in two grisms covered the broad s(0) and s(1) absorption lines, in addition to context... | jupiter's para-h2 distribution from sofia/forcast and voyager/iris 17-37 μm spectroscopy |
we analyzed multiwavelength observations of the previously identified galactic center x-ray binary cxo 174528.79-290942.8 (xid 6592) and determine that the near-infrared counterpart is a red supergiant based on its spectrum and luminosity. scutum x-1 is the only previously known x-ray binary with a red supergiant donor... | a rapidly varying red supergiant x-ray binary in the galactic center |
the colour and stereo surface imaging system (cassis) on board the exomars trace gas orbiter (tgo), operating in push-frame mode, provides multiband images at four different wavelengths thanks to a filter strip assembly with a panchromatic filter and three broadband filters within the visible and near infrared range. t... | cassis-based stereo products for mars after three years in orbit |
the thermal inertia of an asteroid's surface can provide insight into regolith properties, such as the presence of a layer of fine dust, the density and thermal conductivity of a rocky surface, and, together with other observational data, mineralogy. knowledge of the surface characteristics of asteroids is important fo... | asteroid thermal inertia estimates from remote infrared observations: the effects of surface roughness and rotation rate |
in this work, we explore the potentiality of future gravitational wave (gw) and type ia supernovae (sne ia) measurements to detect cosmic opacity by comparing the opacity-free luminosity distance (ld) of gw events with the opacity-dependent ld of sne ia observations. the gw data are simulated from the future measuremen... | exploring the potentiality of future standard candles and standard sirens to detect cosmic opacity |
using hyperspectral data collected by ovirs, the visible and infrared spectrometer on board the origins, spectral interpretation, resource identification, and security-regolith explorer (osiris-rex) spacecraft, we modeled the global average spectrophotometric properties of the carbonaceous asteroid (101955) bennu and m... | spectrophotometric modeling and mapping of (101955) bennu |
the first identification of the argonium ion ( ${\mathrm{arh}}^{+}$ ) toward the crab nebula supernova remnant was proclaimed by herschel in the submillimeter and far-infrared domains. very recently, the discovery of the hydro-helium cation ( ${\mathrm{heh}}^{+}$ ) in the planetary nebula (ngc 7027) by sofia has been r... | exploring the possibility of identifying hydride and hydroxyl cations of noble gas species in the crab nebula filament |
supervised machine-learning models are trained with various molecular descriptors to predict infrared (ir) emission spectra of interstellar polycyclic aromatic hydrocarbons. we demonstrate that a feature importance analysis based on the random forest algorithm can be utilized to explore the physical correlation between... | machine-learning interpretation of the correlation between infrared emission features of interstellar polycyclic aromatic hydrocarbons |
context. polycyclic aromatic hydrocarbon (pah) molecules play an essential role in the prebiotic compound evolution network in the interstellar medium (ism). a recent experimental study revealed that large, astronomically relevant pah-organic molecule clusters are gradually formed through the ion-molecule collision rea... | theoretical study of the formation of large, astronomically relevant pah-organic molecule clusters |
estimation of prokaryotic growth rates is critical to understand the ecological role and contribution of different microbes to marine biogeochemical cycles. however, there is a general lack of knowledge on what factors control the growth rates of different prokaryotic groups and how these vary between sites and along s... | seasonal impact of grazing, viral mortality, resource availability and light on the group-specific growth rates of coastal mediterranean bacterioplankton |
context. interstellar space hosts nanometre- to micron-sized dust grains, which are responsible for the reddening of stars in the visible. the carbonaceous-rich component of these grain populations emits in infrared bands that have been observed remotely for decades with telescopes and satellites. they are a key ingred... | mechanochemical synthesis of aromatic infrared band carriers. the top-down chemistry of interstellar carbonaceous dust grain analogues |
we describe and discuss remarkable infrared spectra, covering key portions of the 2-5 μm wavelength interval, of the probable oh/ir supergiant 2mass j17470898-2829561 (2m1747), located in direction of the sgr b molecular cloud complex within the central molecular zone (cmz) of the galaxy. this star was originally singl... | the interstellar medium toward the galactic center source 2mass j17470898-2829561 |
the light italian cubesat for imaging of asteroids (liciacube) is part of the nasa double asteroid redirection test (dart), the first mission aiming to demonstrate the applicability of the kinetic impactor method for planetary defense. the mission was launched on 2021 november 24 to perform the impact experiment on dim... | expected investigation of the (65803) didymos-dimorphos system using the rgb spectrophotometry data set from the liciacube unit key explorer (luke) wide-angle camera |
the origins space telescope (origins) is one of four science and technology definition studies selected by the national aeronautics and space administration (nasa) in preparation of the 2020 astronomy and astrophysics decadal survey in the us. origins will trace the history of our origins from the time dust and heavy e... | origins space telescope: from first light to life |
firefly is a web framework for astronomical data archive access and visualization developed in the infrared processing and analysis center (ipac). the development started with the spitzer heritage archive (sha), and continued in the wise image archive, planck image archive, and other web applications in the nasa/ipac i... | next generation firefly for web application |
we have used the xshooter echelle spectrograph on the european southern obseratory (eso) very large telescope (vlt) to obtain uvb-vis-nir (ultraviolet-blue (uvb), visible (vis) and near-infrared (nir)) reflectance spectra of two members of the eureka family of l5 mars trojans, in order to test a genetic relationship to... | the olivine-dominated composition of the eureka family of mars trojan asteroids |
classification of young stellar objects (ysos) into different evolutionary stages helps us to understand the formation process of new stars and planetary systems. such classification has traditionally been based on spectral energy distribution (sed) analysis. an alternative approach is provided by supervised machine le... | protostellar classification using supervised machine learning algorithms |
context. dimethyl sulfide, ch3sch3 (dms), is a nonrigid, sulfur-containing molecule whose astronomical detection is considered to be possible in the interstellar medium. very accurate spectroscopic constants were obtained by a laboratory analysis of rotational microwave and millimeter wave spectra, as well as rotation-... | laboratory microwave, millimeter wave and far-infrared spectra of dimethyl sulfide |
red midcourse space experiment (msx) sources (rmss) are regarded as excellent candidates of massive star-forming regions. in order to characterize the chemical properties of massive star formation, we made a systematic study of 87 rmss in the southern sky, using archival data taken from the atacama pathfinder experimen... | chemical evolution of red msx sources in the southern sky |
the small class of known stars with unusually warm, dusty debris disks is a key sample to probe in order to understand cascade models and the extreme collisions that likely lead to the final configurations of planetary systems. because of its extreme dustiness and small radius, the disk of bd +20 307 has a short predic... | studying the evolution of warm dust encircling bd +20 307 using sofia |
a classical paradox in high-mass star formation is that powerful radiation pressure can halt accretion, preventing further growth of a central star. disk accretion has been proposed to solve this problem, but the disks and the accretion process in high-mass star formation are poorly understood. we executed high-resolut... | k-band high-resolution spectroscopy of embedded high-mass protostars |
we identify a sample of spectroscopically measured emission line galaxy (elg) pairs up to z = 1.6 from the wide field camera 3 (wfc3) infrared spectroscopic parallels (wisp) survey. wisp obtained slitless, near-infrared grism spectroscopy along with direct imaging in the j and h bands by observing in the pure-parallel ... | spectroscopically identified emission line galaxy pairs in the wisp survey |
we present 11.1 to 37.1 μm imaging observations of the very dense molecular cloud core mm1 in g034.43+00.24 using forcast on sofia and submillimeter (submm) polarimetry using sharp on the caltech submillimeter observatory. we find that at the spatial resolution of sofia, the point-spread function (psf) of mm1 is consis... | sofia mid-infrared imaging1 and cso submillimeter polarimetry observations of g034.43+00.24 mm1 |
the amount and distribution of water on the lunar surface are related to the input and production of water by solar wind and meteoroid bombardment, balanced by photodestruction and mobility across the surface. using the stratospheric observatory for infrared astronomy (sofia), we imaged the 6.1 μm feature that uniquely... | the distribution of molecular water in the lunar south polar region based upon 6 μm spectroscopic imaging |
molecular hydrogen (h2) is the dominant molecular species in the vast majority of interstellar environments and it plays a crucial role as a radiative coolant. in photodissociation regions (pdrs), it is one of the primary emitters in the near- to mid-infrared, which is due to lines originating from highly excited level... | properties of highly rotationally excited h2 in photodissociation regions |
future far-infrared astronomy missions will need large arrays of detectors with exceptionally low noise-equivalent power (nep), with some mission concepts calling for thousands of detectors with neps below a few $\times 10^{-20}$ w/$\sqrt{\mathrm{hz}}$. though much progress has been made toward meeting this goal, such ... | demonstration of ultra-low noise equivalent power using a longitudinal proximity effect transition-edge sensor |
spectral distortions of the cosmic microwave background (cmb) are sensitive to energy injection by exotic physics in the early universe. the proposed primordial inflation explorer (pixie) mission has the raw sensitivity to provide meaningful limits on new physics, but only if foreground emission can be adequately model... | impact of dust on spectral distortion measurements of the cosmic microwave background |
a dyson sphere is a hypothetical structure that an advanced civilization might build around a star to intercept all of the star's light for its energy needs. one usually thinks of it as a spherical shell about one astronomical unit (au) in radius, and surrounding a more or less sun-like star; and might be detectable as... | dyson spheres around white dwarfs |
we have explored a method for finding giant planets in the outer solar system by detecting their thermal emission and proper motion between two far-infrared all-sky surveys separated by 23.4 yr, taken with the infrared astronomical satellite (iras) and the akari space telescope. an upper distance limit of about 8000 au... | searching for giant planets in the outer solar system with far-infrared all-sky surveys |
we present velocity-resolved stratospheric observatory for infrared astronomy (sofia)/upgrade german receiver for astronomy at terahertz frequencies observations of [o i] and [c ii] lines toward a class i protostar, l1551 irs 5, and its outflows. the sofia observations detect [o i] emission toward only the protostar an... | atomic shocks in the outflow of l1551 irs 5 identified with sofia-upgreat observations of [o i] |
the coherent emission from ionized nitrogen molecules is of interest for remote sensing and astronomical applications. to initiate the lasing process, we used an intense ultrashort near-infrared (nir) pulse overlapped with a terahertz (thz) single-cycle pulse. we observed that coherent emission could be seeded and modu... | terahertz control of air lasing |
the sr 24 multistar system hosts both circumprimary and circumsecondary disks, which are strongly misaligned with each other. the circumsecondary disk is circumbinary in nature. interestingly, both disks are interacting, and they possibly rotate in opposite directions. to investigate the nature of this unique twin disk... | subaru near-infrared imaging polarimetry of misaligned disks around the sr 24 hierarchical triple system |
in this work, we characterize - for the first time - in the gas phase infrared spectra of three isomeric polycyclic aromatic hydrocarbon (pah) cations of c24h14 composition that belong to distinctly different symmetry groups (c2h , cs and c1). mid-infrared (mid-ir) spectra are recorded by means of infrared multiple pho... | mid-infrared spectroscopic signatures of dibenzopyrene cations - the effect of symmetry on pah ir spectroscopy |
we evaluate the hit rate of cosmic rays and their daughter particles on the si:as ibc detectors in the irac instrument on the spitzer space telescope. the hit rate follows the ambient proton flux closely, but the hits occur at more than twice the rate expected just from this flux. toward large amplitudes, the size dist... | cosmic-ray-related signals from detectors in space: the spitzer/irac si:as ibc devices |
broadband infrared photodetectors based on two-dimensional (2d) materials which are the research focus in the infrared field, have wide applications in remote sensing, thermal imaging, and astronomy observation. in this article, the photodetector based on 2d ferromagnetic material cose is studied at room temperature, d... | ferromagnetic cose broadband photodetector at room temperature |
discovery of ch4 in the martian atmosphere has led to much discussion since it could be a signature of biological and/or geological activities on mars. however, the presence of ch4 and its temporal and spatial variations are still under discussion because of the large uncertainties embedded in the previous observations... | stringent upper limit of ch4 on mars based on sofia/exes observations |
aluminum forms strong bonds to oxygen, nitrogen, and hydrogen, but these motifs are relatively rare in the interstellar medium (ism). however, no chemical rationale accounts for this observation. the cyclic molecules alo2, halo2, and (hn)oalh are quintessential examples of the aforementioned phenomenon, and the latter ... | c-alo2, c-halo2, and c-(hn)oalh spectroscopic constants and anharmonic frequencies |
we present mid-infrared stratospheric observatory for infrared astronomy (sofia)/echelon cross echelle spectrograph (exes) spectroscopy of europa, seeking direct evidence of the presence of water vapor arising from plumes venting from the surface. we place quantitatively useful upper limits on the strength of water vib... | a search for water vapor plumes on europa using sofia |
this article describes a new, multi-functional, high-vacuum ice setup that allows to record the in situ and real-time spectra of vacuum uv (vuv)-irradiated non-volatile molecules embedded in a low-temperature (10 k) amorphous solid water environment. three complementary diagnostic tools—uv-visible (uv-vis) and fourier ... | a multifunctional setup to record ftir and uv-vis spectra of organic molecules and their photoproducts in astronomical ices |
we show how new and upcoming advances in the age of time-domain and multi-wavelength astronomy will open up a new venue to probe the diversity of sn~ia. we discuss this in the context of the elt (eso), as well as space based instrument such as james webb space telescope (jwst). as examples we demonstrate how the power ... | thermonuclear supernovae: prospecting in the age of time-domain and multi-wavelength astronomy |
we have investigated the thermally induced proton/deuteron exchange in mixed amorphous h2o:d2o ices by monitoring the change in intensity of characteristic vibrational bending modes of h2o, hdo, and d2o with time and as function of temperature. the experiments have been performed using an ultrahigh vacuum setup equippe... | thermal h/d exchange in polar ice - deuteron scrambling in space |
an unidentified infrared emission (uie) feature at 6.0 μm is detected in a number of astronomical sources showing the uie bands. in contrast to the previous suggestion that this band is due to c=o vibrational modes, we suggest that the 6.0 μm feature arises from olefinic double-bond functional groups. these groups are ... | the 6 μm feature as a tracer of aliphatic components of interstellar carbonaceous grains |
we present photometric observations from the stratospheric observatory for infrared astronomy (sofia) at 11.1 μm of the type iin supernova (sn iin) 2010jl. the sn is undetected by sofia, but the upper limits obtained, combined with new and archival detections from spitzer at 3.6 and 4.5 μm, allow us to characterize the... | sofia observations of sn 2010jl: another non-detection of the 9.7 μm silicate dust feature |
we report on the observed fluxes of the comets detected by neowise during the first year of operations after the spacecraft's reactivation. the sample included 57 comets. of the comets detected, 30 were short-period comets (27 jupiter-family comets, 1 centaur, 2 halley-type comets), and 27 were long-period comets. from... | co and co2 productions rates of comets observed by neowise within year 1 of the reactivated mission |
we report the discovery of a buried, active supermassive black hole (smbh) in sdss j085153.64+392611.76, a bulgeless seyfert 2 (sy2) galaxy. keck near-infrared observations reveal a hidden broad-line region, allowing for the rare case where strong constraints can be placed on both the bh mass and bulge component. using... | the discovery of a hidden broad-line agn in a bulgeless galaxy: keck nir spectroscopic observations of sdss j085153.64+392611.76 |
in the solar system, interplanetary dust particles (idps) originating mainly from asteroid collisions and cometary activities drift to earth orbit due to poynting-robertson drag. we analyzed the thermal emission from idps that was observed by the first japanese infrared astronomical satellite, akari. the observed surfa... | size dependence of dust distribution around the earth orbit |
context. close young binary stars are unique laboratories for the direct measurement of pre-main-sequence (pms) stellar masses and their comparison to evolutionary theoretical models. at the same time, a precise knowledge of their orbital parameters when still in the pms phase offers an excellent opportunity for unders... | the gravity young stellar object survey. v. the orbit of the t tauri binary star ww cha |
we present a new method employing machine-learning techniques for measuring astrophysical features by correcting systematics in irac high-precision photometry using random forests. the main systematic in irac light-curve data is position changes due to unavoidable telescope motions coupled with an intrapixel response f... | random forests applied to high-precision photometry analysis with spitzer irac |
the ultimate astronomical observatory would be a formation flying interferometer in space, immune to atmospheric turbulence and absorption, free from atmospheric and telescope thermal emission, and reconfigurable to adjust baselines according to the required angular resolution. imagine the near/mid-infrared sensitivity... | a realistic roadmap to formation flying space interferometry |
the nancy grace roman space telescope will survey a large area of the sky at near-infrared wavelengths with its wide field instrument (wfi). the performance of the 18 wfi h4rg-10 detectors will need to be well-characterized and regularly monitored in order for roman to meet its science objectives. weak lensing science ... | quantifying roman wfi dark images with the wavelet scattering transform |
context. hydrogen sulfide (h2s) is thought to be efficiently formed on grain surfaces through the successive hydrogenation of sulfur atoms. its non-detection so far in astronomical observations of icy dust mantles thus indicates that effective destruction pathways must play a significant role in its interstellar abunda... | interaction of h2s with h atoms on grain surfaces under molecular cloud conditions |
the so-called "unidentified infrared emission" (uie) features at 3.3, 6.2, 7.7, 8.6, and 11.3 μm ubiquitously seen in a wide variety of astrophysical regions are generally attributed to polycyclic aromatic hydrocarbon (pah) molecules. astronomical pahs often have an aliphatic component (e.g., aliphatic sidegroups like ... | aliphatics and aromatics in the universe: the pre-jwst era |
we study the emergent spectral fluxes of transiting hot jupiters, using secondary eclipses from spitzer. to achieve a large and uniform sample, we have reanalyzed all secondary eclipses for all hot jupiters observed by spitzer at 3.6 and/or 4.5 μm. our sample comprises 457 eclipses of 122 planets, including eclipses of... | emergent spectral fluxes of hot jupiters: an abrupt rise in dayside brightness temperature under strong irradiation |
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