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imaging through diffusers presents a challenging problem with various digital image reconstruction solutions demonstrated to date using computers. we present a computer-free, all-optical image reconstruction method to see through random diffusers at the speed of light. using deep learning, a set of diffractive surfaces... | computational imaging without a computer: seeing through random diffusers at the speed of light |
cubes is the cassegrain u-band efficient spectrograph, a high-efficiency instrument operating in the uv spectral range between 300 nm and 400 nm with a resolution not less than 20,000. cubes is to be installed at a cassegrain focus of the very large telescope of the european southern observatory. the paper briefly revi... | high efficiency transmission grating for the eso cubes uv spectrograph |
the future of astronomy in the coming decades will be shaped by the upcoming three extremely large optical telescopes, the thirty meter telescope (tmt), the giant magellan telescope (gmt) and the european large telescope (elt). the usa astronomy and astrophysics 2020 decadal survey and the canadian long-range plan for ... | india-tmt project—science instrumentation program |
we present the lyman-α (lyα) luminosity function (lf) at 2.05 < z < 3.75, estimated from a sample of 67 lyα-emitter (lae) candidates in the javalambre physics of the accelerating universe astronomical survey (j-pas) pathfinder surveys: minijpas and j-nep. these two surveys cover a total effective area of ∼1.14 de... | the minijpas and j-nep surveys: identification and characterization of the lyα emitter population and the lyα luminosity function at redshift 2.05 < z < 3.75 |
the galaxy evolution explorer (galex) satellite performed the first and only large-area uv survey, which in tandem with the sloan digital sky survey (sdss) has facilitated modeling of the spectral energy distributions of low-redshift galaxies and the determination of various galaxy properties, in particular the star fo... | improved galex uv photometry for 700,000 sdss galaxies |
twenty-six years ago a small committee report, building on earlier studies, expounded a compelling and poetic vision for the future of astronomy, calling for an infrared-optimized space telescope with an aperture of at least 4 m. with the support of their governments in the us, europe, and canada, 20,000 people realize... | the james webb space telescope mission |
we introduce the 4-metre multi-object spectroscopic telescope (4most), a new high-multiplex, wide-field spectroscopic survey facility under development for the four-metre-class visible and infrared survey telescope for astronomy (vista) at paranal. its key specifications are: a large field of view (fov) of 4.2 square d... | 4most: project overview and information for the first call for proposals |
lyα emission from galaxies can be utilized to characterize the ionization state in the intergalactic medium (igm). we report our search for lyα emission at z > 7 using a comprehensive keck/mosfire near-infrared spectroscopic data set, as part of the texas spectroscopic search for lyα emission at the end of reionizat... | texas spectroscopic search for lyα emission at the end of reionization. iii. the lyα equivalent-width distribution and ionized structures at z > 7 |
the leiden atomic and molecular database (lamda) collects spectroscopic information and collisional rate coefficients for molecules, atoms, and ions of astrophysical and astrochemical interest. we describe the developments of the database since its inception in 2005, and outline our plans for the near future. such a da... | the leiden atomic and molecular database (lamda): current status, recent updates, and future plans |
widespread hydration was detected on the lunar surface through observations of a characteristic absorption feature at 3 µm by three independent spacecraft1-3. whether the hydration is molecular water (h2o) or other hydroxyl (oh) compounds is unknown and there are no established methods to distinguish the two using the ... | molecular water detected on the sunlit moon by sofia |
prima (the probe for-infrared mission for astrophysics) is a concept for a far-infrared (ir) observatory. prima features a cryogenically cooled 1.8 m diameter telescope and is designed to carry two science instruments enabling ultra-high sensitivity imaging and spectroscopic studies in the 24 to 235 microns wavelength ... | prima general observer science book |
formation of globular clusters (gcs), the galactic bulge, or galaxy bulges in general is an important unsolved problem in galactic astronomy. homogeneous infrared observations of large samples of stars belonging to gcs and the galactic bulge field are one of the best ways to study these problems. we report the discover... | chemical tagging with apogee: discovery of a large population of n-rich stars in the inner galaxy |
the physical properties and elemental abundances of the interstellar medium in galaxies during cosmic reionization are important for understanding the role of galaxies in this process. we report the atacama large millimeter/submillimeter array detection of an oxygen emission line at a wavelength of 88 micrometers from ... | detection of an oxygen emission line from a high-redshift galaxy in the reionization epoch |
we present the herschel extragalactic legacy project (help). this project collates, curates, homogenizes, and creates derived data products for most of the premium multiwavelength extragalactic data sets. the sky boundaries for the first data release cover 1270 deg2 defined by the herschel spire extragalactic survey fi... | help: the herschel extragalactic legacy project |
the mid-infrared is an optimal window to trace stellar mass in nearby galaxies and the 3.6 μ {{m}} irac band has been exploited to this effect, but such mass estimates can be biased by dust emission. we present our pipeline to reveal the old stellar flux at 3.6 μm and obtain stellar mass maps for more than 1600 galaxie... | the spitzer survey of stellar structure in galaxies (s4g): precise stellar mass distributions from automated dust correction at 3.6 μm |
radiative and mechanical feedback of massive stars regulates star formation and galaxy evolution. positive feedback triggers the creation of new stars by collecting dense shells of gas, while negative feedback disrupts star formation by shredding molecular clouds. although key to understanding star formation, their rel... | stellar feedback and triggered star formation in the prototypical bubble rcw 120 |
the potential habitability of europa's subsurface ocean depends on its chemical composition, which may be reflected in that of europa's geologically young surface. investigations using galileo near-infrared mapping spectrometer data led to the prevailing view that europa's endogenous units are rich in sulfate salts. ho... | sodium chloride on the surface of europa |
it is critical for james webb space telescope (jwst) science that instrumental units are converted to physical units. we detail the design of the jwst absolute flux calibration program that has the core goal of ensuring a robust flux calibration internal to and between all the science instruments for both point and ext... | the james webb space telescope absolute flux calibration. i. program design and calibrator stars |
we present a multiwavelength analysis using the submillimeter array (sma), james clerk maxwell telescope, noema, jwst, the hubble space telescope (hst), and the spitzer space telescope of two dusty strongly star-forming galaxies, 850.1 and 850.2, seen through the massive cluster lens a 1489. these sma-located sources b... | hidden giants in jwst's pearls: an ultramassive z = 4.26 submillimeter galaxy that is invisible to hst |
catwise is a program to catalog sources selected from combined wise and neowise all-sky survey data at 3.4 and 4.6 &mgrm (w1 and w2). the catwise preliminary catalog consists of 900,849,014 sources measured in data collected from 2010 to 2016. this data set represents four times as many exposures and spans over 10 ... | the catwise preliminary catalog: motions from wise and neowise data |
apogee spectra offer ≲1 km s-1 precision in the measurement of stellar radial velocities. this holds even when multiple stars are captured in the same spectrum, as happens most commonly with double-lined spectroscopic binaries (sb2s), although random line-of-sight alignments of unrelated stars can also occur. we develo... | double-lined spectroscopic binaries in the apogee dr16 and dr17 data |
we present the galaxy and mass assembly (gama) panchromatic data release (pdr) constituting over 230 deg2 of imaging with photometry in 21 bands extending from the far-uv to the far-ir. these data complement our spectroscopic campaign of over 300k galaxies, and are compiled from observations with a variety of facilitie... | galaxy and mass assembly (gama): panchromatic data release (far-uv-far-ir) and the low-z energy budget |
we compare mid-infrared (mid-ir), extinction-corrected hα, and co (2-1) emission at 70-160 pc resolution in the first four phangs-jwst targets. we report correlation strengths, intensity ratios, and power-law fits relating emission in jwst's f770w, f1000w, f1130w, and f2100w bands to co and hα. at these scales, co and ... | phangs-jwst first results: mid-infrared emission traces both gas column density and heating at 100 pc scales |
the first jwst observations of nearby galaxies have unveiled a rich population of bubbles that trace the stellar-feedback mechanisms responsible for their creation. studying these bubbles therefore allows us to chart the interaction between stellar feedback and the interstellar medium, and the larger galactic flows nee... | phangs-jwst first results: a statistical view on bubble evolution in ngc 628 |
we present the results from the 1.2 mm continuum image obtained as part of the atacama large millimeter/submillimeter array spectroscopic survey in the hubble ultra deep field. the 1.2 mm continuum image has a size of 2.9 (4.2) arcmin2 within a primary beam response of 50% (10%) and an rms value of $9.3\,\mu \mathrm{jy... | the alma spectroscopic survey in the hudf: deep 1.2 mm continuum number counts |
in this paper, we describe the routine photometric calibration of data taken with the vista infrared camera (vircam) instrument on the eso visible and infrared survey telescope for astronomy (vista) telescope. the broad-band zyjhks data are directly calibrated from two micron all sky survey (2mass) point sources visibl... | the vista zyjhks photometric system: calibration from 2mass |
we report atacama large millimeter array observations of the neutral atomic carbon transitions [c i] and multiple co lines in a sample of ∼30 main-sequence galaxies at $z\sim 1$ , including novel information on [c i] ${(}^{3}{p}_{2}{\mbox{--}}^{3}{p}_{1})$ and co $(7\mbox{--}6)$ for 7 of such normal objects. we complem... | the properties of the interstellar medium of galaxies across time as traced by the neutral atomic carbon [c i] |
jwst observations of polycyclic aromatic hydrocarbon (pah) emission provide some of the deepest and highest resolution views of the cold interstellar medium (ism) in nearby galaxies. if pahs are well mixed with the atomic and molecular gas and illuminated by the average diffuse interstellar radiation field, pah emissio... | phangs-jwst first results: tracing the diffuse interstellar medium with jwst imaging of polycyclic aromatic hydrocarbon emission in nearby galaxies |
we present a catalogue of 73 221 white dwarf candidates extracted from the astrometric and photometric data of the recently published gaia-dr2 catalogue. white dwarfs were selected from the gaia hertzsprung-russell diagram with the aid of the most updated population synthesis simulator. our analysis shows that gaia has... | a white dwarf catalogue from gaia-dr2 and the virtual observatory |
(ultra) luminous infrared galaxies ((u)lirgs) are objects characterized by their extreme infrared (8-1000 μm) luminosities (l lirg > 1011 l ⊙ and l ulirg > 1012 l ⊙). the herschel comprehensive ulirg emission survey (pi: van der werf) presents a representative flux-limited sample of 29 (u)lirgs that spans the ful... | the herschel comprehensive (u)lirg emission survey (hercules): co ladders, fine structure lines, and neutral gas cooling |
we present a new infrared survey covering the three euclid deep fields and four other euclid calibration fields using spitzer space telescope's infrared array camera (irac). we combined these new observations with all relevant irac archival data of these fields in order to produce the deepest possible mosaics of these ... | euclid preparation. xvii. cosmic dawn survey: spitzer space telescope observations of the euclid deep fields and calibration fields |
we present a multi-wavelength photometric catalog in the cosmos field as part of the observations by the cosmic assembly near-infrared deep extragalactic legacy survey. the catalog is based on hubble space telescope wide field camera 3 (hst/wfc3) and advanced camera for surveys observations of the cosmos field (centere... | candels multi-wavelength catalogs: source identification and photometry in the candels cosmos survey field |
we present a new algorithm for precision radial velocity (prv) measurements, a line-by-line (lbl) approach designed to handle outlying spectral information in a simple but efficient manner. the effectiveness of the lbl method is demonstrated on two data sets, one obtained with spirou on barnard's star, and the other wi... | line-by-line velocity measurements: an outlier-resistant method for precision velocimetry |
we present the detection of helium in the extended atmosphere of the sub-saturn wasp-107b using high-resolution (r ≈ 25,000) near-infrared spectra from keck ii/near infrared echelle spectrograph (nirspec). we find peak excess absorption of 7.26% ± 0.24% (30σ) centered on the he i triplet at 10833 å. the amplitude and s... | confirmation of wasp-107b's extended helium atmosphere with keck ii/nirspec |
we present a catalog of about 25,000 images of massive (m ⋆ ≥ 109 m ⊙) galaxies at redshifts 3 ≤ z ≤ 6 from the tng50 cosmological simulation, tailored for observations at multiple wavelengths carried out with jwst. the synthetic images were created with the skirt radiative transfer code, including the effects of dust ... | expectations of the size evolution of massive galaxies at 3 ≤ z ≤ 6 from the tng50 simulation: the ceers/jwst view |
the electromagnetic counterpart to the galactic center supermassive black hole, sgr a*, has been observed in the near-infrared for over 20 yr and is known to be highly variable. we report new keck telescope observations showing that sgr a* reached much brighter flux levels in 2019 than ever measured at near-infrared wa... | unprecedented near-infrared brightness and variability of sgr a* |
we use phangs-james webb space telescope (jwst) data to identify and classify 1271 compact 21 μm sources in four nearby galaxies using miri f2100w data. we identify sources using a dendrogram-based algorithm, and we measure the background-subtracted flux densities for jwst bands from 2 to 21 μm. using the spectral ener... | phangs-jwst first results: the 21 μm compact source population |
the self-powered and ultra-broadband photodetectors based on photothermoelectric (pte) effect are promising for diverse applications such as sensing, environmental monitoring, night vision and astronomy. the sensitivity of pte photodetectors is determined by the seebeck coefficient and the rising temperature under illu... | phonon-enhanced photothermoelectric effect in srtio3 ultra-broadband photodetector |
we describe the sources of stray light and thermal background that affect jwst observations, report actual backgrounds as measured from commissioning and early-science observations, compare these background levels to prelaunch predictions, estimate the impact of the backgrounds on science performance, and explore how t... | how dark the sky: the jwst backgrounds |
we obtained spectra of the pre-main-sequence star au microscopii during a transit of its neptune-sized planet to investigate its orbit and atmosphere. we used the high-dispersion near-infrared spectrograph infrared doppler (ird) on the subaru telescope to detect the doppler "shadow" from the planet and constrain the pr... | limits on the spin-orbit angle and atmospheric escape for the 22 myr old planet au mic b |
the juno spacecraft acquired direct observations of the jovian magnetosphere and auroral emissions from a vantage point above the poles. juno’s capture orbit spanned the jovian magnetosphere from bow shock to the planet, providing magnetic field, charged particle, and wave phenomena context for juno’s passage over the ... | jupiter’s magnetosphere and aurorae observed by the juno spacecraft during its first polar orbits |
aims: molecular line lists (catalogues of transition frequencies and line strengths) are important for modelling absorption and emission processes in atmospheres of different astronomical objects, such as cool stars and exoplanets. in order to be applicable for high temperatures, line lists for molecules like methane m... | a hybrid line list for ch4 and hot methane continuum |
edge enhanced imaging via the spiral phase contrast enables to reveal the phase or amplitude gradients of a target, which has been proved useful in feature recognition, machine vision, and object identification. a long quest is to extend the operation wavelength into the mid-infrared (mir) region, as highly demanded in... | mid-infrared single-photon edge enhanced imaging based on nonlinear vortex filtering |
high-resolution airborne wide-band camera (hawc+) is the facility far-infrared imager and polarimeter for sofia, nasa’s stratospheric observatory for infrared astronomy. it is designed to cover the portion of the infrared spectrum that is completely inaccessible to ground-based observatories and which is essential for ... | hawc+, the far-infrared camera and polarimeter for sofia |
elements with weak and blended spectral features in stellar spectra are challenging to measure and require specialized analysis methods to precisely measure their chemical abundances. in this work, we have created a catalog of approximately 120,000 giants with high signal-to-noise apache point observatory galactic evol... | bacchus analysis of weak lines in apogee spectra (bawlas) |
microwave kinetic inductance detectors (mkids) are the most attractive radiation detectors for far-infrared and sub-mm astronomy: they combine ultimate sensitivity with the possibility to create very large detector arrays, in excess of 10 000 pixels. this is possible by reading-out the arrays using rf frequency divisio... | multiplexed readout for 1000-pixel arrays of microwave kinetic inductance detectors |
jwst is here. the early release observation (ero) program provides us with the first look at the scientific data and the spectral capabilities. one of the targets from the ero is hat-p-18b, an inflated saturn-mass planet with an equilibrium temperature of ~850 k. we present the niriss/soss transmission spectrum of hat-... | water and an escaping helium tail detected in the hazy and methane-depleted atmosphere of hat-p-18b from jwst niriss/soss |
high-quality astronomical images delivered by modern ground-based and space observatories demand adequate, reliable software for their analysis and accurate extraction of sources, filaments, and other structures, containing massive amounts of detailed information about the complex physical processes in space. the multi... | multiscale, multiwavelength extraction of sources and filaments using separation of the structural components: getsf |
the apache point observatory galactic evolution experiment (apogee) of sloan digital sky survey iii (sdss-iii) has produced a large catalog of high resolution ({r = 22 500}), high quality (s/n > 100), infrared (h-band) spectra for stars throughout all stellar populations of the milky way, including in regions veiled... | the apache point observatory galactic evolution experiment (apogee) and its successor, apogee-2 |
after observing wasp-12 in the second year of the primary mission, the transiting exoplanet survey satellite (tess) revisited the system in late 2021 during its extended mission. in this paper, we incorporate the new tess photometry into a reanalysis of the transits, secondary eclipses, and phase curve. we also present... | tess revisits wasp-12: updated orbital decay rate and constraints on atmospheric variability |
some recent literature has claimed there to be an evolution in galaxies' dust temperatures toward warmer (or colder) spectral energy distributions (seds) between low and high redshift. these conclusions are driven by both theoretical models and empirical measurement. such claims sometimes contradict one another and are... | no redshift evolution of galaxies' dust temperatures seen from 0 < z < 2 |
observations of star-forming regions by the current and upcoming generation of submillimetre polarimeters will shed new light on the evolution of magnetic fields over the cloud-to-core size scales involved in the early stages of the star formation process. recent wide-area and high-sensitivity polarization observations... | submillimeter and far-infrared polarimetric observations of magnetic fields in star-forming regions |
single flux density measurements at observed-frame submillimeter and millimeter wavelengths are commonly used to probe dust and gas masses in galaxies. in this letter, we explore the robustness of this method to infer dust mass, focusing on quiescent galaxies, using a series of controlled experiments on four massive ha... | dust temperature uncertainties hamper the inference of dust and molecular gas masses from the dust continuum emission of quiescent high-redshift galaxies |
we have constructed the most comprehensive catalog of photometry and proper motions ever assembled for a globular cluster (gc). the core of ωcen has been imaged over 650 times through wfc3's uvis and ir channels for the purpose of detector calibration. there exist from 4 to over 60 exposures through each of 26 filters ... | the state-of-the-art hst astro-photometric analysis of the core of ω centauri. i. the catalog |
the astronomical emission features, formerly known as the unidentified infrared bands, are now commonly ascribed to polycyclic aromatic hydrocarbons (pahs). the laboratory experiments and computational modeling performed at nasa ames research center generated a collection of pah ir spectra that have been used to test a... | the nasa ames pah ir spectroscopic database: the laboratory spectra |
we present here the first release of the open-source python package exotethys (stable: https://zenodo.org/badge/latestdoi/169268509, development version: https://github.com/ucl-exoplanets/exotethys/), which aims to provide a stand-alone set of tools for modeling spectrophotometric observations of transiting exoplanets.... | the exotethys package: tools for exoplanetary transits around host stars |
feedback is a sofia (stratospheric observatory for infrared astronomy) legacy program dedicated to study the interaction of massive stars with their environment. it performs a survey of 11 galactic high mass star-forming regions in the 158 μm (1.9 thz) line of [c ii] and the 63 μm (4.7 thz) line of [o i]. we employ the... | feedback: a sofia legacy program to study stellar feedback in regions of massive star formation |
we report the first detection of a hydroxyl radical (oh) emission signature in the planetary atmosphere outside the solar system, in this case, in the dayside of wasp-33b. we analyze high-resolution near-infrared emission spectra of wasp-33b taken using the infrared doppler spectrograph on the 8.2 m subaru telescope. t... | first detection of hydroxyl radical emission from an exoplanet atmosphere: high-dispersion characterization of wasp-33b using subaru/ird |
at least half of a protostar's mass is accreted in the class 0 phase, when the central protostar is deeply embedded in a dense, infalling envelope. we present the first systematic search for outbursts from class 0 protostars in the orion clouds. using photometry from spitzer/irac spanning 2004 to 2017, we detect three ... | the rate, amplitude, and duration of outbursts from class 0 protostars in orion |
the second gaia data release (dr2) contains astrometric and photometric data for more than 1.6 billion objects with mean gaia g magnitude <20.7, including many young stellar objects (ysos) in different evolutionary stages. in order to explore the yso population of the milky way, we combined the gaia dr2 data base wi... | identification of young stellar object candidates in the gaia dr2 x allwise catalogue with machine learning methods |
the observed mass-radius relationship of low-mass planets informs our understanding of their composition and evolution. recent discoveries of low-mass, large-radius objects ("super-puffs") have challenged theories of planet formation and atmospheric loss, as their high inferred gas masses make them vulnerable to runawa... | deflating super-puffs: impact of photochemical hazes on the observed mass-radius relationship of low-mass planets |
we have obtained new images of the protoplanetary disk orbiting tw hya in visible, total intensity light with the space telescope imaging spectrograph (stis) on the hubble space telescope (hst), using the newly commissioned bar5 occulter. these hst/stis observations achieved an inner working angle of ∼0.″2, or 11.7 au,... | chasing shadows: rotation of the azimuthal asymmetry in the tw hya disk |
the james webb space telescope's near infrared imager and slitless spectrograph (jwst-niriss) flies a 7-hole non-redundant mask (nrm), the first such interferometer in space, operating at 3-5 μm wavelengths, and a bright limit of ≃4 mag in w2. we describe the niriss aperture masking interferometry (ami) mode to help po... | the near infrared imager and slitless spectrograph for the james webb space telescope. iv. aperture masking interferometry |
we present the colors and activity of ultracool (m7-l8) dwarfs from the tenth data release of the sloan digital sky survey (sdss). we combine previous samples of sdss m and l dwarfs with new data obtained from the baryon oscillation sky survey (boss) to produce the boss ultracool dwarf (bud) sample of 11820 m7-l8 dwarf... | boss ultracool dwarfs. i. colors and magnetic activity of m and l dwarfs |
complex organic molecules (coms) have been identified in different environments in star-forming regions. laboratory studies show that coms form in the solid state, on icy grains, typically following a 'non-energetic' (atom-addition) or 'energetic' (uv-photon absorption) trigger. so far, such studies have been largely p... | production of complex organic molecules: h-atom addition versus uv irradiation |
we present ground-based infrared transit observations for four dynamically interacting kepler planets, including kepler-29b, kepler-36c, koi-1783.01, and kepler-177c, obtained using the wide-field infrared camera on the hale 200 inch telescope at palomar observatory. by utilizing an engineered diffuser and custom guidi... | diffuser-assisted infrared transit photometry for four dynamically interacting kepler systems |
we present dust column densities and dust temperatures for ∼3000 young, high-mass molecular clumps from the millimeter astronomy legacy team 90 ghz survey, derived from adjusting single-temperature dust emission models to the far-infrared intensity maps measured between 160 and 870 μm from the herschel/herschel infrare... | far-infrared dust temperatures and column densities of the malt90 molecular clump sample |
in the 1980s, excess infrared emission was discovered around main-sequence stars; subsequent direct-imaging observations revealed orbiting disks of cold dust to be the source. these `debris disks' were thought to be by-products of planet formation because they often exhibited morphological and brightness asymmetries th... | fast-moving features in the debris disk around au microscopii |
we present an unsupervised machine learning technique that automatically segments and labels galaxies in astronomical imaging surveys using only pixel data. distinct from previous unsupervised machine learning approaches used in astronomy we use no pre-selection or pre-filtering of target galaxy type to identify galaxi... | an automatic taxonomy of galaxy morphology using unsupervised machine learning |
the era of all-sky space astrometry began with the hipparcos mission in 1989 and provided the first very accurate catalogue of apparent magnitudes, positions, parallaxes and proper motions of 120 000 bright stars at the milliarcsec (or milliarcsec per year) accuracy level. hipparcos has now been superseded by the resul... | all-sky visible and near infrared space astrometry |
using radial velocity data from the habitable zone planet finder, we have measured the mass of the neptune-sized planet k2-25b, as well as the obliquity of its m4.5 dwarf host star in the 600-800 myr hyades cluster. this is one of the youngest planetary systems for which both of these quantities have been measured and ... | the habitable zone planet finder reveals a high mass and low obliquity for the young neptune k2-25b |
the future is now - after its long-awaited launch in 2021 december, jwst began science operations in 2022 july and is already revolutionizing exoplanet astronomy. the early release observations (ero) programme was designed to provide the first images and spectra from jwst, covering a multitude of science cases and usin... | awesome soss: transmission spectroscopy of wasp-96b with niriss/soss |
young exoplanets can offer insight into the evolution of planetary atmospheres, compositions, and architectures. we present the discovery of the young planetary system toi 451 (tic 257605131, gaia dr2 4844691297067063424). toi 451 is a member of the 120 myr old pisces-eridanus stream (psc-eri). we confirm membership in... | tess hunt for young and maturing exoplanets (thyme). iv. three small planets orbiting a 120 myr old star in the pisces-eridanus stream |
accurate rate coefficients for molecular vibrational transitions due to collisions with h2, critical for interpreting infrared astronomical observations, are lacking for most molecules. quantum calculations are the primary source of such data, but reliable values that consider all internal degrees of freedom of the col... | quantum dynamics of co-h2 in full dimensionality |
we present a far-infrared all-sky atlas from a sensitive all-sky survey using the japanese akari satellite. the survey covers > 99% of the sky in four photometric bands centred at 65 μm, 90 μm, 140 μm, and 160 μm, with spatial resolutions ranging from 1' to 1{^''.}5. these data provide crucial information on the inv... | the akari far-infrared all-sky survey maps |
context. observationally, supernovae (sne) are divided into subclasses according to their distinct characteristics. this diversity naturally reflects the diversity in the progenitor stars. it is not entirely clear, however, how different evolutionary paths leading massive stars to become an sn are governed by fundament... | constraints on core-collapse supernova progenitors from explosion site integral field spectroscopy |
we tested the validity of the three larson relations in a sample of 213 massive clumps selected from the herschel infrared galactic plane (hi-gal) survey, also using data from the millimetre astronomy legacy team 90 ghz (malt90) survey of 3-mm emission lines. the clumps are divided into five evolutionary stages so that... | testing the larson relations in massive clumps |
the photodissociation region toolbox provides comprehensive, easy-to-use, public software tools and models that enable an understanding of the interaction of the light of young, luminous, massive stars with the gas and dust in the milky way and in other galaxies. it consists of an open-source python toolkit and photodi... | the photodissociation region toolbox: software and models for astrophysical analysis |
the cosmic evolution early release science survey (ceers), targeting the extended groth strip extragalactic field, is one of the james webb space telescope director's discretionary early release science programs. to date, all observations have been executed and include nircam/miri imaging and nirspec/nircam spectroscop... | ceers miri imaging: data reduction and quality assessment |
almost two-thirds of disk galaxies in the local universe host bars, which serve as important drivers of secular evolutionary processes. while cosmological simulations are powerful tools to study the formation and evolution of galaxies, they have often struggled to generate reasonable bar populations. we measure the fra... | barred galaxies in the illustristng simulation |
galactic outflows driven by starbursts can modify the galactic magnetic fields and drive them away from the galactic planes. here, we quantify how these fields may magnetize the intergalactic medium (igm). we estimate the strength and structure of the fields in the starburst galaxy m82 using thermal polarized emission ... | the strength and structure of the magnetic field in the galactic outflow of messier 82 |
the detectors in the mid-infrared instrument (miri) of the james webb space telescope (jwst) are arsenic-doped silicon impurity band conduction (si:as ibc) devices and are direct descendants of the spitzer irac long wavelength arrays (channels 3 and 4). with appropriate data processing, they can provide excellent perfo... | jwst miri flight performance: detector effects and data reduction algorithms |
numerous ongoing and future large area surveys (e.g. dark energy survey, euclid, large synoptic survey telescope, wide field infrared survey telescope) will increase by several orders of magnitude the volume of data that can be exploited for galaxy morphology studies. the full potential of these surveys can be unlocked... | deep learning for galaxy surface brightness profile fitting |
we report the discovery of a multi unit spectroscopic explorer (muse) galaxy group at z = 4.32 lensed by the massive galaxy cluster act-cl j0102-4915 (aka el gordo) at z = 0.87, associated with a 1.2 mm source that is at a 2.07 ± 0.88 kpc projected distance from one of the group galaxies. three images of the whole syst... | alma lensing cluster survey: an alma galaxy signposting a muse galaxy group at z = 4.3 behind "el gordo" |
in this paper, i present a new set of synthetic spectral energy distributions (seds) for young stellar objects (ysos) spanning a wide range of evolutionary stages, from the youngest deeply embedded protostars to pre-main-sequence stars with few or no disks. these models include significant improvements on the previous ... | a modular set of synthetic spectral energy distributions for young stellar objects |
context. since april 5, 2008 and up to february 15, 2017, the solar spectrometer (solspec) instrument of the solar payload on board the international space station (iss) has performed accurate measurements of solar spectral irradiance (ssi) from the middle ultraviolet to the infrared (165 to 3088 nm). these measurement... | solar-iss: a new reference spectrum based on solar/solspec observations |
ishell is a 1.06-5.3 μm high spectral resolution spectrograph built for the 3.2 m nasa infrared telescope facility (irtf) on maunakea, hawaii. dispersion is accomplished with a silicon immersion grating in order to keep the instrument small enough to be mounted at the cassegrain focus of the telescope. the white pupil ... | ishell: a 1-5 micron r = 80,000 immersion grating spectrograph for the nasa infrared telescope facility |
one of the most important and well-established empirical results in astronomy is the kennicutt-schmidt relation between the density of interstellar gas and the rate at which that gas forms stars. a tight correlation between these quantities has long been measured at galactic scales. more recently, using surveys of ysos... | the single-cloud star formation relation |
the cosmic thermal history, quantified by the evolution of the mean thermal energy density in the universe, is driven by the growth of structures as baryons get shock heated in collapsing dark matter halos. this process can be probed by redshift-dependent amplitudes of the thermal sunyaev-zeldovich (sz) effect backgrou... | the cosmic thermal history probed by sunyaev-zeldovich effect tomography |
barnard's star is among the most studied stars given its proximity to the sun. it is often considered the radial velocity (rv) standard for fully convective stars due to its rv stability and equatorial decl. recently, an $m\sin i=3.3{m}_{\oplus }$ super-earth planet candidate with a 233 day orbital period was announced... | stellar activity manifesting at a one-year alias explains barnard b as a false positive |
we present a new database of fully radiative shock models calculated with the shock and photoionization code mappings v. the database architecture is built to contain diverse shock grids comprising of multiple shock parameters. it can be easily accessible through the mysql protocol. intensities of spectral lines from i... | extensive online shock model database |
the geometric description of gravitational memory for strong gravitational waves is developed, with particular focus on shockwaves and their spinning analogues, gyratons. memory, which may be of position or velocity-encoded type, characterises the residual separation of neighbouring `detector' geodesics following the p... | memory, penrose limits and the geometry of gravitational shockwaves and gyratons |
we study the time-variable linear polarisation of sgr a* during a bright near-infrared flare observed with the gravity instrument on july 28, 2018. motivated by the time evolution of both the observed astrometric and polarimetric signatures, we interpret the data in terms of the polarised emission of a compact region (... | dynamically important magnetic fields near the event horizon of sgr a* |
the mass-loss rate (mlr) is one of the most important parameters in astrophysics, because it impacts many areas of astronomy, such as ionizing radiation, wind feedback, star-formation rates, initial mass functions, stellar remnants, supernovae, and so on. however, the most important modes of mass loss are also the most... | evolved massive stars at low-metallicity. v. mass-loss rate of red supergiant stars in the small magellanic cloud |
astronomical spectroscopy has recently expanded into the near-infrared (nir) wavelength region, raising the demands on atomic transition data. the interpretation of the observed spectra largely relies on theoretical results, and progress towards the production of accurate theoretical data must continuously be made. spe... | coulomb (velocity) gauge recommended in multiconfiguration calculations of transition data involving rydberg series |
we explore the relation between the stellar mass surface density and the mass surface density of molecular hydrogen gas in 12 nearby molecular clouds that are located at <1.5 kpc distance. the sample clouds span an order-of-magnitude range in mass, size, and star formation rates. we use thermal dust emission from he... | star-gas surface density correlations in 12 nearby molecular clouds. i. data collection and star-sampled analysis |
sulphur dioxide is well-known in the atmospheres of planets and satellites, where its presence is often associated with volcanism, and in circumstellar envelopes of young and evolved stars as well as the interstellar medium. this work presents a line list of 1.3 billion 32s16o2 vibration-rotation transitions computed u... | exomol molecular line lists - xiv. the rotation-vibration spectrum of hot so2 |
context. the g-type star gj504a is known to host a 3-35 mjup companion whose temperature, mass, and projected separation all contribute to making it a test case for planet formation theories and atmospheric models of giant planets and light brown dwarfs.aims: we aim at revisiting the system age, architecture, and compa... | the gj 504 system revisited. combining interferometric, radial velocity, and high contrast imaging data |
infrared observations of metastable 23s helium absorption with ground- and space-based spectroscopy are rapidly maturing, as this species is a unique probe of exoplanet atmospheres. specifically, the transit depth in the triplet feature (with vacuum wavelengths near 1083.3 nm) can be used to constrain the temperature a... | constraints on metastable helium in the atmospheres of wasp-69b and wasp-52b with ultranarrowband photometry |
using new atacama pathfinder experiment and james clerk maxwell telescope spectroscopy of the co 2→1 line, we undertake a controlled study of cold molecular gas in moderately luminous (lbol = 1043-44.5 erg s-1) active galactic nuclei (agn) and inactive galaxies from the luminous local agn with matched analogs (llama) s... | llama: normal star formation efficiencies of molecular gas in the centres of luminous seyfert galaxies |
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