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the launch of jwst has ushered in a new era of high precision infrared astronomy, allowing us to probe nearby white dwarfs for cold dust, exoplanets, and tidally heated exomoons. while previous searches for these exoplanets have successfully ruled out companions as small as 7-10 jupiter masses, no instrument prior to j... | a miri search for planets and dust around wd 2149+02 |
we present here the first ever mid-infrared spectroscopic time series observation of the transiting exoplanet l 168-9 b with the mid-infrared instrument (miri) on the james webb space telescope. the data were obtained as part of the miri commissioning activities, to characterize the performance of the low resolution sp... | spectroscopic time series performance of the mid-infrared instrument on the jwst |
context. the magellanic clouds are a nearby pair of interacting dwarf galaxies and satellites of the milky way. studying their kinematic properties is essential to understanding their origin and dynamical evolution. they have prominent tidal features and the kinematics of these features can give hints about the formati... | the vmc survey. xxxviii. proper motion of the magellanic bridge |
we have undertaken a near-ir weak-lensing (nirwl) analysis of the candels hst/wfc3-ir f160w observations. with the gaia proper motion-corrected catalog as an astrometric reference, we updated the astrometry of the five candels mosaics and achieved an absolute alignment within 0.″02 ± 0.″02, on average, which is a facto... | near-ir weak-lensing (nirwl) measurements in the candels fields. i. point-spread function modeling and systematics |
accreting supermassive black holes (smbhs) located at the centers of galaxies are typically surrounded by large quantities of gas and dust. the structure and evolution of this circumnuclear material can be studied at different wavelengths, from the submillimeter to the x-ray. recent x-ray studies have shown that the co... | bass. xlii. the relation between the covering factor of dusty gas and the eddington ratio in nearby active galactic nuclei |
simple and complex organic molecules (coms) are observed along different phases of star and planet formation and have been successfully identified in prestellar environments such as dark and translucent clouds. yet the picture of organic molecule formation at those earliest stages of star formation is not complete and ... | hydrogenation of accreting c atoms and co molecules-simulating ketene and acetaldehyde formation under dark and translucent cloud conditions |
detections of molecules in the atmosphere of gas giant exoplanets allow us to investigate the physico-chemical properties of the atmospheres. their inferred chemical composition is used as tracer of planet formation and evolution mechanisms. currently, an increasing number of detections is showing a possible rich chemi... | the gaps programme at tng xxxix. multiple molecular species in the atmosphere of the warm giant planet wasp-80 b unveiled at high resolution with giano-b |
we report individual dynamical masses of 66.92 ± 0.36 m jup and 53.25 ± 0.29 m jup for the binary brown dwarfs ɛ indi ba and bb, measured from long-term (≈10 yr) relative orbit monitoring and absolute astrometry monitoring data on the very large telescope (vlt). relative astrometry with naco fully constrains the kepler... | precise dynamical masses of ɛ indi ba and bb: evidence of slowed cooling at the l/t transition |
comprehensive line lists for phosphorus monoxide (31p16o) and phosphorus monosulphide (31p32s) in their x 2π electronic ground state are presented. the line lists are based on new ab initio potential energy (pec), spin-orbit (soc) and dipole moment (dmc) curves computed using the mrci+q-r method with aug-cc-pwcv5z and ... | exomol molecular line lists - xxiii. spectra of po and ps |
context. the formation of methanol (ch3oh) on icy grain mantles during the star formation cycle is mainly associated with the co freeze-out stage. yet there are reasons to believe that ch3oh also can form at an earlier period of interstellar ice evolution in co-poor and h2o-rich ices.aims: this work focuses on ch3oh fo... | formation of interstellar methanol ice prior to the heavy co freeze-out stage |
we present spectral analysis of the transiting saturn-mass planet wasp-117 b, observed with the g141 grism of the hubble space telescope's (hst) wide field camera 3. we reduce and fit the extracted spectrum from the raw transmission data using the open-source software iraclis before performing a fully bayesian retrieva... | wasp-117 b: an eccentric hot saturn as a future complex chemistry laboratory |
a near-infrared, color-selected subset of carbon-rich asymptotic giant branch (c-agb) stars is found to have tightly constrained luminosities in the near-infrared j band. based on jk photometry of some 3300 c-agb stars in the bar of the large magellanic cloud (lmc) we find that these stars have a constant absolute magn... | astrophysical distance scale: the agb j-band method. i. calibration and a first application |
in this paper, weak-turbulence theory is used to investigate the nonlinear evolution of the parametric instability in three-dimensional low-β plasmas at wavelengths much greater than the ion inertial length under the assumption that slow magnetosonic waves are strongly damped. it is shown analytically that the parametr... | parametric instability, inverse cascade and the 1/f range of solar-wind turbulence |
we study the nonlinearity (nl) in the conversion from charge to voltage in infrared detectors (hxrg) for use in precision astronomy. we present laboratory measurements of the nl function of a h2rg detector and discuss the accuracy to which it would need to be calibrated in future space missions to perform cosmological ... | nonlinearity and pixel shifting effects in hxrg infrared detectors |
context. many main-sequence stars are part of multiple systems. the effect of stellar multiplicity on planet formation and migration, however, is poorly understood.aims: we study the multiplicity of stars hosting known transiting extra-solar planets to test competing theories on the formation mechanisms of hot jupiters... | a multiplicity study of transiting exoplanet host stars. i. high-contrast imaging with vlt/sphere |
we have obtained keck near-infrared spectroscopy of a sample of nine m⋆ < 1010 m⊙ dwarf galaxies to confirm active galactic nuclei (agns) activity and the presence of galaxy-wide, agn-driven outflows through coronal line (cl) emission. we find strong cl detections in 5/9 galaxies (55%) with line ratios incompatible ... | near-infrared coronal line observations of dwarf galaxies hosting agn-driven outflows |
we report the discovery of a transiting, temperate, neptune-sized exoplanet orbiting the nearby (d = 27.5 pc), m3v star toi-1231 (nltt 24399, l 248-27, 2mass j10265947-5228099). the planet was detected using photometric data from the transiting exoplanet survey satellite and followed up with observations from the las c... | toi-1231 b: a temperate, neptune-sized planet transiting the nearby m3 dwarf nltt 24399 |
whether ice in cold cosmic environments is physically separated from the silicate dust or mixed with individual silicate moieties is not known. however, different grain models give very different compositions and temperatures of grains. the aim of the present study is to compare the mid-infrared spectra of laboratory s... | dust/ice mixing in cold regions and solid-state water in the diffuse interstellar medium |
context. as part of interstellar dust, polycyclic aromatic hydrocarbons (pahs) are processed by an interaction with vacuum ultraviolet (vuv) photons emitted by hot stars. this interaction leads to the emission of not only the well-known aromatic infrared bands, but also electrons, which can significantly contribute to ... | astrochemical relevance of vuv ionization of large pah cations |
a formalism to describe the false-vacuum decay in non-perturbative regimes was proposed recently. here, we extend it to the presence of einstein gravity and calculate the corresponding effective potential and decay rate for a $\lambda \phi^4$ scalar field theory. a comparison with the usual perturbative decay rate show... | fate of false vacuum in non-perturbative regimes: gravity effects |
until now, our knowledge of the extragalactic universe at mid-infrared (mid-ir) wavelengths (>5 μm) was limited to rare active galactic nuclei and the brightest normal galaxies up to z ~ 3. the advent of jwst with its mid-infrared instrument (miri) will revolutionize the ability of the mid-ir regime as a key wavelen... | a first look into the nature of jwst/miri 7.7 μm sources from smacs 0723 |
we present the discovery of wisea j083011.95+283716.0, the first y-dwarf candidate identified through the "backyard worlds: planet 9" citizen science project. we identified this object as a red, fast-moving source with a faint w2 detection in multiepoch allwise and unwise images. we have characterized this object with ... | wisea j083011.95+283716.0: a missing link planetary-mass object |
we present far-infrared polarimetry observations of m82 at 53 and 154 μm and ngc 253 at 89 μm, which were taken with high-resolution airborne wideband camera-plus (hawc+) in polarimetry mode on the stratospheric observatory for infrared astronomy. the polarization of m82 at 53 μm clearly shows a magnetic field geometry... | sofia far-infrared imaging polarimetry of m82 and ngc 253: exploring the supergalactic wind |
atmospheric retrievals are now a standard tool to analyze observations of exoplanet atmospheres. this data-driven approach quantitatively compares atmospheric models to observations in order to estimate atmospheric properties and their uncertainties. in this paper, we introduce a new retrieval package, the phoenix exop... | the phoenix exoplanet retrieval algorithm and using h- opacity as a probe in ultrahot jupiters |
recently, gas disks have been discovered around main-sequence stars well beyond the usual protoplanetary disk lifetimes (that is, ≳10 myr), when planets have already formed1-4. these gas disks, mainly composed of co, carbon and oxygen5-7, seem to be ubiquitous3 in systems with planetesimal belts (similar to our kuiper ... | formation of secondary atmospheres on terrestrial planets by late disk accretion |
one of the most fundamental baryonic matter components of galaxies is the neutral atomic hydrogen (h i). at low redshifts, this component can be traced directly through the 21 cm transition, but to infer the h i gas content of the most distant galaxies, a viable tracer is needed. we here investigate the fidelity of the... | investigating the [c ii]-to-h i conversion factor and the h i gas budget of galaxies at z ≈ 6 with hydrodynamic simulations |
globular clusters (gcs) in the milky way are the primary laboratories for establishing the ages of the oldest stellar populations and for measuring the color-magnitude relation of stars. in infrared (ir) color-magnitude diagrams (cmds), the stellar main sequence (ms) exhibits a “kink” due to opacity effects in m dwarfs... | constraining globular cluster age uncertainties using the ir color-magnitude diagram |
brown dwarfs exhibit patchy or spatially varying banded cloud structures that are inferred through photometric and spectroscopic variability modeling techniques. however, these methods are insensitive to rotationally invariant structures, such as the bands seen in jupiter. here, we present h-band very large telescope/n... | detection of polarization due to cloud bands in the nearby luhman 16 brown dwarf binary |
the terahertz and far-infrared band, ranging from approximately 0.3 thz to 15 thz (1 mm to 20 μm), is important for astrophysics as it hosts the peak of the thermal radiation of the cold component of the universe as well as many spectral lines that trace the cycle of interstellar matter1-8. however, water vapour makes ... | terahertz and far-infrared windows opened at dome a in antarctica |
molecular hydrogen clouds are a key component of the interstellar medium because they are the birthplaces for stars. they are embedded in atomic gas that pervades the interstellar space. however, the details of how molecular clouds assemble from and interact with the atomic gas are still largely unknown. as a result of... | ionized carbon as a tracer of the assembly of interstellar clouds |
we report new observations toward the hyperluminous dusty starbursting major merger adfs-27 (z = 5.655), using the australia telescope compact array (atca) and the atacama large millimeter/submillimeter array (alma). we detect co (j = 2 → 1), co (j = 8 → 7), co (j = 9 → 8), co (j = 10 → 9), and h2o (312 → 221) emission... | rise of the titans: gas excitation and feedback in a binary hyperluminous dusty starburst galaxy at z ∼ 6 |
the "disk substructures at high angular resolution project" (dsharp) has revealed an abundance and ubiquity of rings and gaps over a large sample of young planet-forming disks, which are hypothesized to be induced by the presence of forming planets. in this context, we present the first attempt to directly image these ... | a search for companions via direct imaging in the dsharp planet-forming disks |
we report the first measurement of polarized thermal dust emission toward the entire infrared dark cloud g11.11-0.12 taken by the polarimeter sofia/hawc+ at 214 μm. the obtained magnetic fields (b-fields) from the polarized emission of the early-stage and massive filament tend to be perpendicular to its spine. we produ... | b-fields and dust in interstellar filaments using dust polarization (ballad-pol). i. the massive filament g11.11-0.12 observed by sofia/hawc+ |
we study protostellar envelope and outflow evolution using hubble space telescope nicmos or wfc3 images of 304 protostars in the orion molecular clouds. these near-ir images resolve structures in the envelopes delineated by the scattered light of the central protostars with 80 au resolution, and they complement the 1.2... | an hst survey of protostellar outflow cavities: does feedback clear envelopes? |
interstellar dust extinction curves provide valuable information about dust properties, including the composition and size of the dust grains, and are essential to correct observations for the effects of interstellar dust. in this work, we measure a representative sample of near-infrared (nir; 0.8-5.5 μm) spectroscopic... | spex near-infrared spectroscopic extinction curves in the milky way |
carbon monoxide (co) is predicted to be the dominant carbon-bearing molecule in giant planet atmospheres and, along with water, is important for discerning the oxygen and therefore carbon-to-oxygen ratio of these planets. the fundamental absorption mode of co has a broad, double-branched structure composed of many indi... | detection of carbon monoxide's 4.6 micron fundamental band structure in wasp-39b's atmosphere with jwst nirspec g395h |
polycyclic aromatic hydrocarbons (pahs) are abundant in many regions of the universe, representing a major reservoir for cosmic carbon. however, their formation pathways in cold regions of space remain elusive. recent astronomical detections show that current astrochemical models drastically underestimate the abundance... | low-temperature nitrogen-bearing polycyclic aromatic hydrocarbon formation routes validated by infrared spectroscopy |
the james webb space telescope is expected to revolutionize our understanding of jovian worlds over the coming decade. however, as we push toward characterizing cooler, smaller, terrestrial-like planets, dedicated next-generation facilities will be required to tease out the small spectral signatures indicative of biolo... | the detectability and constraints of biosignature gases in the near- and mid-infrared from transit transmission spectroscopy |
the cosmic origin of fluorine is still not well constrained. several nucleosynthetic channels at different phases of stellar evolution have been suggested, but these must be constrained by observations. for this, the fluorine abundance trend with metallicity spanning a wide range is required. our aim is to determine st... | fluorine in the solar neighborhood: the need for several cosmic sources |
we present a consistent total flux catalogue for a ∼1 deg2 subset of the cosmic evolution survey (cosmos) region (ra ∈ [149.55°, 150.65°], dec. ∈ [1.80°, 2.73°]) with near-complete coverage in 38 bands from the far-ultraviolet to the far-infrared. we produce aperture matched photometry for 128 304 objects with i < 2... | g10/cosmos: 38 band (far-uv to far-ir) panchromatic photometry using lambdar |
the wide-field infrared survey telescope (wfirst) is a nasa space mission in study for launch in 2024. it has a 2.4 m telescope, wide-field ir instrument operating in the 0.7 - 2.0 micron range and an exoplanet imaging coronagraph instrument operating in the 400 - 1000 nm range. the observatory will perform galaxy surv... | wide-field infrared survey telescope (wfirst) mission and synergies with lisa and ligo-virgo |
the magellanic clouds are nearby dwarf irregular galaxies whose morphologies show different properties when traced by different stellar populations, making them an important laboratory for studying galaxy morphologies. we study the morphology of the magellanic clouds using data from the visible and infrared survey tele... | the vmc survey - xxxiv. morphology of stellar populations in the magellanic clouds |
this study revisits the role that nitrogen inclusion in polycyclic aromatic hydrocarbons (pahs; those with nitrogen inclusion, panhs) plays in their infrared (ir) spectral properties. we present spectra of pure pahs, panhs, and protonated panhs, computed using density functional theory and basis sets that treat polariz... | the 6.2 μm pah feature and the role of nitrogen: revisited |
i have used high-precision photometry and astrometry from the second data release of the gaia mission to perform a survey for young stars associated with the lupus clouds, which have distances of ∼160 pc and reside within the scorpius-centaurus (sco-cen) ob association. the gaia data have made it possible to distinguis... | a gaia survey for young stars associated with the lupus clouds |
context. the number of identified complex organic molecules (coms) in inter- and circumstellar gas-phase environments is steadily increasing. recent laboratory studies show that many such species form on icy dust grains. at present only smaller molecular species have been directly identified in space in the solid state... | infrared spectra of complex organic molecules in astronomically relevant ice matrices. i. acetaldehyde, ethanol, and dimethyl ether |
the nancy grace roman space telescope is capable of delivering an unprecedented all-sky, high-spatial resolution, multi-epoch infrared map to the astronomical community. this opportunity arises in the midst of numerous ground- and space-based surveys that will provide extensive spectroscopy and imaging together coverin... | nancy: next-generation all-sky near-infrared community survey |
we apply the near-infrared j-region asymptotic giant branch (jagb) method, recently introduced by madore & freedman, to measure the distances to 14 nearby galaxies out to 4 mpc. we use the geometric detached eclipsing binary (deb) distances to the lmc and smc as independent zero-point calibrators. we find excellent... | astrophysical distance scale. ii. application of the jagb method: a nearby galaxy sample |
located in the lower centaurus crux group, hd 106906 is a young, binary stellar system. this system is unique among discovered systems in that it contains an asymmetrical debris disk, as well as an 11 mjup planet companion, at a separation of ~735 au. only a handful of other systems are known to contain both a disk and... | a deep polarimetric study of the asymmetrical debris disk hd 106906 |
the [c ii] fine-structure transition at 158 μm is frequently the brightest far-infrared line in galaxies. due to its low ionization potential, c+ can trace the ionized, atomic, and molecular phases of the ism. we present velocity-resolved [c ii] and [n ii] pointed observations from sofia/great on ~500 pc scales in the ... | characterizing the multiphase origin of [c ii] emission in m101 and ngc 6946 with velocity-resolved spectroscopy |
determining the effective temperatures (teff) of red supergiants (rsgs) observationally is important in many fields of stellar physics and galactic astronomy, yet some significant difficulties remain as a result of the model uncertainty, which originates mainly in the extended atmospheres of rsgs. here we propose a lin... | effective temperatures of red supergiants estimated from line-depth ratios of iron lines in the yj bands, 0.97-1.32μm |
we present the average gas properties derived from atacama large millimeter array (alma) band 6 dust continuum imaging of 126 massive (log m ⋆/m ⊙ ≳ 10.5), star-forming cluster galaxies across 11 galaxy clusters at z = 1-1.75. using stacking analysis on the alma images, combined with uv-far-infrared data, we quantify t... | significant molecular gas deficiencies in star-forming cluster galaxies at z 1.4 |
we describe the design of the field-imaging far-infrared line spectrometer (fifi-ls), operated as a facility-class instrument on the stratospheric observatory for infrared astronomy (sofia). fifi-ls is an imaging spectrometer for medium resolution spectroscopy. since being commissioned in 2014, it has performed over 50... | fifi-ls: the field-imaging far-infrared line spectrometer on sofia |
in a survey of 65 galaxies, gao & solomon found a tight linear relation between the infrared luminosity (l ir, a proxy for the star formation rate) and the hcn(1-0) luminosity ({l}{{hcn}}). wu et al. found that this relation extends from these galaxies to the much less luminous galactic molecular high-mass star-for... | linking dense gas from the milky way to external galaxies |
high mass x-ray binaries are among the brightest x-ray sources in the milky way, as well as in nearby galaxies. thanks to their highly variable emissions and complex phenomenology, they have attracted the interest of the high energy astrophysical community since the dawn of x-ray astronomy. in more recent years, they h... | advances in understanding high-mass x-ray binaries with integraland future directions |
in the episodic accretion scenario, a large fraction of the protostellar mass accretes during repeated and large bursts of accretion. since outbursts on protostars are typically identified at specific wavelengths, interpreting these outbursts requires converting this change in flux to a change in total luminosity. the ... | radiative transfer modeling of ec 53: an episodically accreting class i young stellar object |
although infrared (ir) overall dust emission from clusters of galaxies has been statistically detected using data from the infrared astronomical satellite (iras), it has not been possible to sample the spectral energy distribution (sed) of this emission over its peak, and thus to break the degeneracy between dust tempe... | planck intermediate results. xliii. spectral energy distribution of dust in clusters of galaxies |
nonlocal theories of gravity have recently drawn a lot of attention because they can suitably represent the behavior of gravitational interaction in the ultraviolet regime. furthermore, at infrared scales, they give rise to notable cosmological effects which could be important to describe the dark energy behavior. in p... | constraining nonlocal gravity by s2 star orbits |
high resolution (0.005 cm-1) absorption cross sections have been measured for pure propane (c3h8). these cross sections cover the 2550-3500 cm-1 region at five temperatures (from 296 to 700 k) and were measured using a fourier transform spectrometer and a quartz cell heated by a tube furnace. calibrations were made by ... | temperature-dependent high resolution absorption cross sections of propane |
we have used the mid-infrared instrument (miri) on the james webb space telescope (jwst) to obtain the first spatially resolved, mid-infrared images of iizw096, a merging luminous infrared galaxy (lirg) at z = 0.036. previous observations with the spitzer space telescope suggested that the vast majority of the total ir... | goals-jwst: unveiling dusty compact sources in the merging galaxy iizw096 |
the brightest observed emission line in many star-forming galaxies is the [{{c}} {{ii}}] 158 μm line, making it detectable up to z ∼ 7. in order to better understand and quantify the [{{c}} {{ii}}] emission as a tracer of star formation, the theoretical ratio between the [{{n}} {{ii}}] 205 μm emission and the [{{c}} {{... | using [c ii] 158 μm emission from isolated ism phases as a star formation rate indicator |
in this paper we present the cmzoom survey's catalog of compact sources (<10″, ∼0.4 pc) within the central molecular zone (cmz). cmzoom is a submillimeter array large program designed to provide a complete and unbiased map of all high column density gas (n(h2) ≥ 1023 cm-2) of the innermost 500 pc of the galaxy in th... | cmzoom. ii. catalog of compact submillimeter dust continuum sources in the milky way's central molecular zone |
we study the 3 μm scattering feature of water ice detected in the outer disk of hd 142527 by performing radiative transfer simulations. we show that an ice mass abundance at the outer disk surface of hd 142527 is much lower than estimated in a previous study. it is even lower than inferred from far-infrared ice observa... | the water-ice feature in near-infrared disk-scattered light around hd 142527: micron-sized icy grains lifted up to the disk surface? |
solid carbon dioxide (co2) has long been recognized as a component of both interstellar and solar system ices, but a recent literature search has revealed significant qualitative and quantitative discrepancies in the laboratory spectra on which the abundances of extraterrestrial co2 are based. here we report new infrar... | first infrared band strengths for amorphous co2, an overlooked component of interstellar ices |
the “brighter-fatter” (bf) effect is a phenomenon—originally discovered in charge coupled devices—in which the size of the detector point-spread function (psf) increases with brightness. we present, for the first time, laboratory measurements demonstrating the existence of the effect in a hawaii-2rg hgcdte near-infrare... | laboratory measurement of the brighter-fatter effect in an h2rg infrared detector |
understanding the properties of the galactic emission at millimetre wavelengths is important for studies of the cosmic microwave background (cmb). in this work we explore the bispectrum, the harmonic equivalent of the three point function, from galactic dust and synchrotron emission. we investigate these effects across... | the bispectrum of polarized galactic foregrounds |
we present a new catalog of 11,209 o-rich asymptotic giant branch (agb) stars and 7172 c-rich agb stars in our galaxy, identifying more agb stars in the bulge component and considering more visual carbon stars. for each object, we cross-identify the infrared astronomical satellite (iras), akari, midcourse space experim... | a new catalog of asymptotic giant branch stars in our galaxy |
we report the first detection of galactic spiral structure by means of thermal emission from magnetically aligned dust grains. our 89 μm polarimetric imaging of ngc 1068 with the high-resolution airborne wideband camera/polarimeter (hawc+) on nasas stratospheric observatory for infrared astronomy (sofia) also sheds lig... | sofia/hawc+ traces the magnetic fields in ngc 1068 |
the stratospheric observatory for infrared astronomy (sofia), the largest airborne observatory in the world, is in full operation capability since february 2014 and is currently completing its observing cycle 6 program. the first four years of operation have provided the opportunity to assess the high-level observatory... | sofia at full operation capability: technical performance |
we present 5-14 $\mu$m spectra at two different positions across the orion bar photodissociation region (pdr) obtained with the infrared spectrograph onboard the spitzer space telescope and 3.3 $\mu$m pah observations obtained with the stratospheric observatory for infrared astronomy (sofia). we aim to characterize emi... | characterizing the pah emission in the orion bar |
gas phase spectroscopic laboratory experiments for the buckminsterfullerene cation c60+ have resulted in accurate rest wavelengths for five c60+ transitions that have been compared with diffuse interstellar bands (dibs) in the near infra-red. detecting these in astronomical spectra is difficult because of the strong co... | the edibles survey ii. the detectability of c60+ bands |
galactic globular clusters (gcs) show overwhelming photometric and spectroscopic evidence for the existence of multiple stellar populations. the question of whether or not there exists a gc that represents a true “simple stellar population” remains open. here we focus on ruprecht 106 (r106), a halo gc with [fe/h] = -1.... | ruprecht 106: a riddle, wrapped in a mystery, inside an enigma |
infrared absorption spectra of isobutane (c4h10) were recorded in the ch stretching spectral region (2500-3280 cm-1) by high resolution fourier transform spectroscopy (bruker ifs 125 hr). these spectra were taken at temperatures and pressures appropriate for the gas giant planets jupiter and saturn, as well as for satu... | infrared absorption cross sections of isobutane with hydrogen and nitrogen as broadening gases |
multiwavelength images from the far-uv (∼0.15 μm) to the submillimeter of the central region of the galaxy ngc 3351 are analyzed to constrain its stellar populations and dust attenuation. despite hosting a ∼1 kpc circumnuclear starburst ring, ngc 3351 deviates from the irx-β relation, the relation between the infrared-... | revisiting attenuation curves: the case of ngc 3351 |
we present an alma 1.3 mm (band 6) continuum survey of lensed submillimeter galaxies (smgs) at z = 1.0 to ∼3.2 with an angular resolution of ∼0"2. these galaxies were uncovered by the herschel lensing survey and feature exceptionally bright far-infrared continuum emission (speak ≳ 90 mjy) owing to their lensing magnifi... | alma 1.3 mm survey of lensed submillimeter galaxies selected by herschel: discovery of spatially extended smgs and implications |
we have analyzed the broadband x-ray spectra of active galactic nuclei (agns) in two "nonmerging" luminous infrared galaxies (lirgs), ugc 2608 and ngc 5135, utilizing the data of nuclear spectroscopic telescope array, suzaku, xmm-newton, and chandra. applying the x-ray clumpy-torus model (xclumpy), we find that both so... | nature of compton-thick active galactic nuclei in "nonmerging" luminous infrared galaxies ugc 2608 and ngc 5135 revealed with broadband x-ray spectroscopy |
astronomical observations have already reported that the abundances of nh, nh2, and nh3 cannot be explained with gas phase chemistry modeling and depend strongly on the environment where these three n-hydrides have been detected. consequently, dust grains may play a crucial role in the formation of these species throug... | n + h surface reaction under interstellar conditions: does the nh/nh2/nh3 distribution depend on n/h ratio? |
using a sample of 472 local universe (z < 0.06) galaxies in the stellar mass range 10.25 {<} log {m}_{\star }/{m}_{⊙} {<} 10.75, we explore the variation in galaxy structure as a function of morphology and galaxy colour. our sample of galaxies is subdivided into red, green, and blue colour groups and into elli... | galaxy and mass assembly (gama): variation in galaxy structure across the green valley |
we present aperture masking interferometry (ami) observations of the star hip 65426 at $3.8\,\rm{\mu m}$ as a part of the \textit{jwst} direct imaging early release science (ers) program obtained using the near infrared imager and slitless spectrograph (niriss) instrument. this mode provides access to very small inner ... | the \\textit{jwst} early release science program for direct observations of exoplanetary systems iii: aperture masking interferometric observations of the star hip\\,65426 at $\\boldsymbol{3.8\\,\\rm{\\mu m}}$ |
y dwarfs, the coolest known spectral class of brown dwarfs, overlap in mass and temperature with giant exoplanets, providing unique laboratories for studying low-temperature atmospheres. however, only a fraction of y dwarf candidates have been spectroscopically confirmed. we present keck/nires near-infrared spectroscop... | cwise j105512.11+544328.3: a nearby y dwarf spectroscopically confirmed with keck/nires |
light pollution at astronomical observatories is one of the main factors to be taken into account to preserve their scientific productivity and their useful lifetime. using the garstang-cinzano model applied to the visible infrared imaging radiometer suite (viirs) 2021 satellite radiance data, we have compared 28 sites... | light pollution indicators for all the major astronomical observatories |
a long-term (1995-2016) survey for novae in the nearby andromeda galaxy (m31) was conducted as part of the research-based science education initiative. during the course of the survey 180 nights of observation were completed at kitt peak, arizona. a total of 262 novae were either discovered or confirmed, 40 of which ha... | the rate and spatial distribution of novae in m31 as determined by a 20 year survey |
we describe the perkins infrared exosatellite survey (pines), a near-infrared photometric search for short-period transiting planets and moons around a sample of 393 spectroscopically confirmed l- and t-type dwarfs. pines is performed with boston university's 1.8 m perkins telescope observatory, located on anderson mes... | the perkins infrared exosatellite survey (pines) i. survey overview, reduction pipeline, and early results |
hot methane is found in many “cool” sub-stellar astronomical sources including brown dwarfs and exoplanets, as well as in combustion environments on earth. we report on the first high-resolution laboratory absorption spectra of hot methane at temperatures up to 1200 k. our observations are compared to the latest theore... | empirical line lists and absorption cross sections for methane at high temperatures |
context. emission lines that are indicative of active accretion have been observed for a number of low-mass companions (m < 30 mjup) to stars. line variability is ubiquitous on stellar accretors, but it has never been characterized in detail for low-mass companions. such characterizations can offer insights into the... | emission line variability of young 10-30 mjup companions. i. the case of gq lup b and gsc 06214-00210 b |
context. red supergiant stars are one of the latest stages in the evolution of massive stars. their photospheric convection may play an important role in the launching mechanism of their mass loss; however, its characteristics and dynamics are still poorly constrained.aims: by observing red supergiant stars with near i... | the convective photosphere of the red supergiant ce tauri. i. vlti/pionier h-band interferometric imaging |
we investigate the mid-infrared (ir) emission in the orion bar photodissociation region (pdr), using archival photometric and spectroscopic observations from the united kingdom infrared telescope (ukirt), spitzer, infrared space observatory(iso), and stratospheric observatory for infrared astronomy (sofia) telescopes. ... | orion bar as a window to the evolution of pahs |
we present james webb space telescope (jwst) imaging of ngc 7469 with the near-infrared camera and the mid-infrared instrument. ngc 7469 is a nearby, z = 0.01627, luminous infrared galaxy that hosts both a seyfert type-1.5 nucleus and a circumnuclear starburst ring with a radius of ~0.5 kpc. the new near-infrared (nir)... | goals-jwst: nircam and miri imaging of the circumnuclear starburst ring in ngc 7469 |
we present a new ground-based visual transmission spectrum of the hot jupiter wasp-43b, obtained as part of the access survey. the spectrum was derived from four transits observed between 2015 and 2018, with combined wavelength coverage between 5300 and 9000 å and an average photometric precision of 708 ppm in 230 å bi... | access: a visual to near-infrared spectrum of the hot jupiter wasp-43b with evidence of h2o, but no evidence of na or k |
dust formation in supernova ejecta is currently the leading candidate to explain the large quantities of dust observed in the distant, early universe. however, it is unclear whether the ejecta-formed dust can survive the hot interior of the supernova remnant (snr). we present infrared observations of ~0.02 solar masses... | old supernova dust factory revealed at the galactic center |
most galaxies in clusters have supermassive black holes (smbhs) at their center, and a fraction of those smbhs show strong activity. these active galactic nuclei (agns) are an important probe of environmental dependence of galaxy evolution, intracluster medium, and cluster-scale feedback. we investigated agn fraction i... | lower agn abundance in galaxy clusters at z < 0.5 |
to understand how strong emission-line galaxies (selgs) contribute to the overall growth of galaxies and star formation history of the universe, we target selgs from the zfourge imaging survey that have blended hβ+[o iii] rest-frame equivalent widths of >230 å and 2.5 < ${z}_{\mathrm{phot}}$ < 4.0. using keck/... | mosel: strong [oiii] 5007 å emitting galaxies at (3 < z < 4) from the zfourge survey |
we present a hubble space telescope/wide-field camera 3 near-infrared spectrum of the archetype y dwarf wisep 182831.08+265037.8. the spectrum covers the 0.9-1.7 μm wavelength range at a resolving power of λ/δλ ≈ 180 and is a significant improvement over the previously published spectrum because it covers a broader wav... | an improved near-infrared spectrum of the archetype y dwarf wisep j182831.08+265037.8 |
a sample of 1.3 mm continuum cores in the dragon infrared dark cloud (also known as g28.37+0.07 or g28.34+0.06) is analyzed statistically. based on their association with molecular outflows, the sample is divided into protostellar and starless cores. statistical tests suggest that the protostellar cores are more massiv... | evidence of core growth in the dragon infrared dark cloud: a path for massive star formation |
the discovery of the universe and of the interstellar medium (ism) is based on the knowledge of the molecules that are present in those places. most of our understanding about the composition of the ism and planetary atmospheres has been made possible almost entirely thanks to spectroscopic observations. sulfur dioxide... | co2-, he- and h2-broadening coefficients of so2 for ν1 band and ground state transitions for astrophysical applications |
our work presents an independent calibration of the j-region asymptotic giant branch (jagb) method using infrared survey facility photometric data and a custom luminosity function profile to determine jagb mean magnitudes for nine galaxies. we determine a mean absolute magnitude of carbon stars of mlmc = -6.212 ± 0.010... | the araucaria project. distances to nine galaxies based on a statistical analysis of their carbon stars (jagb method) |
citizen science has helped astronomers comb through large data sets to identify patterns and objects that are not easily found through automated processes. the milky way project (mwp), a citizen science initiative on the zooniverse platform, presents internet users with infrared (ir) images from spitzer space telescope... | the milky way project second data release: bubbles and bow shocks |
we present a comprehensive study of the silicate features at 9.7 and 18 μm of a sample of almost 800 active galactic nuclei (agns) with available spectra from the spitzer infrared spectrograph (irs). we measure the strength of the silicate feature at 9.7 μm, s 9.7, before and after subtracting the host galaxy emission ... | a complete census of silicate features in the mid-infrared spectra of active galaxies |
we report on the detection of the ground-state rotational line of ortho-d2h+ at 1.477 thz (203 μm) using the german receiver for astronomy at terahertz frequencies (great) on board the stratospheric observatory for infrared astronomy (sofia). the line is seen in absorption against far-infrared continuum from the protos... | detection of interstellar ortho-d2h+ with sofia |
machine learning feature importance calculations are used to determine the molecular substructures that are responsible for mid- and far-infrared (ir) emission features of neutral polycyclic aromatic hydrocarbons (pahs). using the extended-connectivity fingerprint as a descriptor of chemical structure, a random forest ... | machine learning identified molecular fragments responsible for infrared emission features of polycyclic aromatic hydrocarbons |
non-rocky sub-jovian exoplanets in high-irradiation environments are rare. ltt 9779b, also known as transiting exoplanet survey satellite (tess) object of interest (toi) 193.01, is one of the few such planets discovered to date, and the first example of an ultrahot neptune. the planet&'s bulk density indicates that... | spitzer reveals evidence of molecular absorption in the atmosphere of the hot neptune ltt 9779b |
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