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reparameterized semi-empirical methods can reproduce gas-phase experimental vibrational frequencies to within 24 cm-1 or better for a 100-fold decrease in computational cost in the anharmonic fundamental vibrational frequencies. to achieve such accuracy and efficiency, the default parameters in the pm6 semi-empirical m... | reparameterized semi-empirical methods for computing anharmonic vibrational frequencies of multiply-bonded hydrocarbons |
planet formation by pebble accretion requires an efficient inward flux of icy pebbles to explain the many mini-neptunes and super-earths discovered by kepler within 1 au. recently, hints of large-scale pebble migration have been found in the anticorrelation between the line ratio of water-to-other volatiles detected in... | testing the retrieval of inner disk water enrichment with spitzer/irs and jwst/miri |
in recent years, polarization infrared detection technology has made great progress and has been successfully applied in various fields such as national defense, astronomy, and civil applications. however, so far, the integration of micro polarizers and infrared photodetectors is still a big challenge since metal micro... | polarization-sensitive infrared photodetectors based on van der waals heterojunction with the unilateral depletion region |
an infrared spectro-polarimeter installed on the solar flare telescope at the mitaka headquarters of the national astronomical observatory of japan is described. the new spectro-polarimeter observes the full sun via slit scans performed at two wavelength bands, one near 1565 nm for a zeeman-sensitive spectral line of f... | infrared spectro-polarimeter on the solar flare telescope at naoj/mitaka |
isoviolanthrene (c34h18), a polycyclic aromatic hydrocarbon (pah) molecule, was studied via matrix isolation in argon and water at 20 k. infrared spectroscopy was performed in situ where samples were irradiated using ultraviolet light. experimental spectra were compared to theoretical spectra for vibrational band assig... | pah products and processing by different energy sources |
the irradiation of pure solid n2 at 3 k with far-ultraviolet light from a synchrotron produced infrared absorption lines at 1657.7, 1655.6, and 1652.4 cm-1 and an ultraviolet absorption line at 272.0 nm, which are characteristic of the product n3. the threshold wavelength at which n3 was generated was 145.6 ± 2.9 nm, c... | formation of n3, ch3, hcn, and hnc from the far-uv photolysis of ch4 in nitrogen ice |
presented are the first interferometric images of cool starspots on the chromospherically active giant $\lambda$ andromedae. these images represent the first model-independent images of cool starspots on a star other than the sun to date. the interferometric observations, taken with the michigan infra-red combiner coup... | first images of cool starspots on a star other than the sun: interferometric imaging of $\\lambda$ andromedae |
this is the fourth paper exploring the infrared properties of giant h ii regions with the forcast instrument on the stratospheric observatory for infrared astronomy (sofia). our survey utilizes the census of 56 milky way giant h ii regions identified by conti & crowther, and in this paper we present the 20 and 37 μ... | surveying the giant h ii regions of the milky way with sofia. iv. sgr d, w42, and a reassessment of the giant h ii region census |
the extragalactic background light (ebl) contains all the radiation emitted by nuclear and accretion processes in stars and compact objects since the epoch of recombination. measuring the ebl density directly is challenging, especially in the near-to-far-infrared wave band, mainly due to the zodiacal light foreground. ... | probing the extragalactic mid-infrared background with hawc |
images measured through the atmosphere are degraded by scattering and absorption from aerosols along the path and by atmospheric turbulence. in the presence of heavy scattering at visible and infrared wavelengths, the distances over which reasonable observations are possible are quite short compared to astronomical ima... | reconstruction of images degraded by aerosol scattering and measurement noise |
egb 6 is a faint, large, ancient planetary nebula (pn). its central star, a hot daoz white dwarf (wd), is a prototype of a rare class of pn nuclei associated with dense, compact emission-line knots. the central star also shows excess fluxes in both the near-infrared (nir) and mid-infrared (mir). in a 2013 paper, we use... | the nucleus of the planetary nebula egb 6 as a post-mira binary |
using data from millimetre astronomy legacy team survey at 90 ghz (malt90), we present a molecular line study of a sample of apex telescope large area survey of the galaxy (atlasgal) clumps. twelve emission lines have been detected in all. we found that in most sources, emissions of hc3n, hn13c, ch3cn, hnco and sio sho... | hnco: a molecule that traces low-velocity shocks |
the zone of avoidance makes it difficult for astronomers to catalogue galaxies at low latitudes to our galactic plane due to high star densities and extinction. however, having a complete sky map of galaxies is important in a number of fields of research in astronomy. there are many unclassified sources of light in the... | evolutionary deep learning to identify galaxies in the zone of avoidance |
this study assesses the contribution of neutral polycyclic aromatic hydrocarbons (pahs) and hydrogenated pahs (hn-pahs) in h2o-ices to the 3 μm and 5-8 μm regions of the infrared absorption spectrum of the young stellar object, mon r2 irs 3, and the taurus dense cloud in the direction of elias 16. we compare the astron... | assessment of the presence of pahs and hydrogenated pahs in the young stellar object mon r2 and the taurus dense cloud toward elias 16 |
the james webb space telescope (jwst) will provide multispectral and hyperspectral infrared images of a large number of astrophysical scenes. multispectral images will have the highest angular resolution, while hyperspectral images (e.g., with integral field unit spectrometers) will provide the best spectral resolution... | simulated jwst data sets for multispectral and hyperspectral image fusion |
studies of fundamental parameters of very low-mass objects are indispensable to provide tests of stellar evolution models that are used to derive theoretical masses of brown dwarfs and planets. however, only objects with dynamically determined masses and precise photometry can effectively evaluate the predictions of st... | evidence of a substellar companion to ab dor c |
the galileo near infrared mapping spectrometer (nims) collected spectra of europa in the 0.7-5.2 μm wavelength region, which have been critical to improving our understanding of the surface composition of this moon. however, most of the work done to get constraints on abundances of species like water ice, hydrated sulf... | a comprehensive revisit of select galileo/nims observations of europa |
we present a new procedure rooted in deep learning to construct science images from data cubes collected by astronomical instruments using hxrg detectors in low-flux regimes. it improves on the drawbacks of the conventional algorithms to construct 2d images from multiple readouts by using the readout scheme of the dete... | correlated read noise reduction in infrared arrays using deep learning |
we present the detection of a broad 8 μm feature in newly formed dust around the carbon-rich wolf-rayet (wc) binary wr 125 from n-band low-resolution (nl; r ~ 250) spectroscopy between 7.3 and 13.6 μm and n-band (11.7 μm) and q-band (18.8 μm) imaging with subaru/comics in 2019 october. wr 125 is a colliding-wind binary... | detection of a broad 8 μm uir feature in the mid-infrared spectrum of wr 125 observed with subaru/comics |
as a complement to the hygal stratospheric observatory for infrared astronomy legacy program, we report the results of a groundbased absorption line survey of simple molecules in diffuse and translucent galactic clouds. using the institut de radioastronomie millimétrique (iram) 30 m telescope, we surveyed molecular lin... | hygal: characterizing the galactic ism with observations of hydrides and other small molecules. ii. the absorption line survey with the iram 30 m telescope |
we examine and quantify how hybrid (e.g., uv+ir) star formation rate (sfr) estimators and the a fuv-β relation depend on inclination for disk-dominated galaxies using spectral energy distribution modeling that utilizes the inclination-dependent attenuation curves described in doore et al. we perform this analysis on a ... | the impact of inclination-dependent attenuation on ultraviolet star formation rate tracers |
the high-resolution mid-infrared spectrometer (hirmes) is a high resolving power ( r 100,000) instrument operating in the 25-122 μm spectral range and will fly on board the stratospheric observatory for far-infrared astronomy in 2019. central to hirmes are its two transition edge sensor (tes) bolometric cameras, an 8 ×... | fabrication of ultrasensitive tes bolometric detectors for hirmes |
solid water has been observed on the surface of many different astronomical objects and is the dominant ice present in the universe, from the solar system (detected on the surface of some asteroids, planets and their satellites, trans-neptunian objects [tnos], comets, etc.) to dense cold interstellar clouds (where inte... | ion irradiation of ethane and water mixture ice at 15 k: implications for the solar system and the ism |
we present a catalog of 167 newly discovered, irregular variables spanning a ~7 deg2 area that encompasses the g 305 star-forming complex, one of the most luminous giant h ii regions in the galaxy. we aim to unveil and characterize the young stellar object (yso) population of the region by analyzing the ks-band variabi... | the g 305 star-forming region. ii. irregular variable stars |
we present a deep near-infrared (nir; j, h, and ks bands) photometric catalogue of sources from the parkes h i zone of avoidance (hizoa) survey, which forms the basis for an investigation of the matter distribution in the zone of avoidance. observations were conducted between 2006 and 2013 using the infrared survey fac... | nir tully-fisher in the zone of avoidance - iii. deep nir catalogue of the hizoa galaxies |
the magnetic field structure of a star-forming bok globule bhr 71 was determined based on near-infrared polarimetric observations of background stars. the magnetic field in bhr 71 was mapped from 25 stars. by using a simple 2d parabolic function, the plane-of-sky magnetic axis of the core was found to be θmag = 125° ± ... | distortion of magnetic fields in bhr 71 |
rotation-vibration line lists for 23na19f, 39k19f, and 41k19f in their ground electronic states are presented. experimental data previously collected for infrared transitions up to v=8 and v=9 for kf [1] and naf [2], respectively, and for pure rotational transitions have been used to construct potential energy curves t... | molecular line lists: the ro-vibrational spectra of naf and kf |
magnetic fields are a critical component of interior and atmospheric models of low-mass stars. additionally, stellar activity associated with magnetic fields may make exoplanets around k and m stars uninhabitable. here we describe the measurement of the magnetic fields of k and m dwarfs from high-resolution spectra, an... | the impact of rotation velocity on measuring magnetic fields of k and m stars |
our understanding of the structure and stellar population of the galactic bulge has improved significantly in the last 5 years or so, thanks to large near infrared photometric surveys such as the vista variables in the via lactea [vvv][]minniti+2010 coupled to massive spectroscopic campaigns such as argos, gaia eso, gi... | the stellar population, 3d structure, and kinematics of the galactic bulge |
the icy mantles of interstellar dust grains are the birthplaces of the primordial prebiotic molecular inventory that may eventually seed nascent solar systems and the planets and planetesimals that form therein. here, we present a study of two of the most abundant species in these ices after water: carbon dioxide (co2)... | thz time-domain spectroscopy of mixed co2-ch3oh interstellar ice analogs |
understanding the origin and early evolution of stars is one of the fundamental objectives of astronomy. this can be possible with observations made from space in the mid- to far-infrared and millimeter-wave part of the spectrum which require detectors with very high sensitivity. in the framework of the spica project a... | characterization of doped silicon thermometers for very high sensitivity cryogenic bolometers |
we present high-contrast h-band polarized intensity (pi) images of the transitional disk around the young solar-like star gm aur. the near-infrared direct imaging of the disk was derived by polarimetric differential imaging using the subaru 8.2 m telescope and hiciao. an angular resolution and an inner working angle of... | resolved near-infrared image of the inner cavity in the gm aur transitional disk |
we have applied the semi-empirical spectral analysis, developed by the sloan digital sky survey (sdss)-iv/apache point observatory galactic evolution experiment 2 (apogee2) massive star team, to a large sample of new o- and b-type stars identified along the sagittarius spiral arm, in the direction of the southern star ... | massive stars in the sdss-iv/apogee2 survey. iii. new ob stars in the direction of the sagittarius spiral arm |
the japanese infrared astronomical satellite akari performed ∼4000 pointed observations for 16 months until the end of august 2007, when the telescope and instruments were cooled by liquid helium. observation targets include solar system objects, galactic objects, local galaxies, and galaxies at cosmological distances.... | revised calibration for near- and mid-infrared images from ∼4000 pointed observations with akari/irc |
we introduce a collection of primarily centrally star-forming galaxies that are selected by disk color to have truncated disk star formation. we show that common explanations for centrally concentrated star formation—low stellar mass, bars, and high-density environments—do not universally apply to this sample. to gain ... | breakbrd galaxies. i. global properties of spiral galaxies with central star formation in red disks |
we present korg, a new package for 1d lte spectral synthesis of fgk stars, which computes theoretical spectra from the near-ultraviolet to the near-infrared, and implements both plane-parallel and spherical radiative transfer. we outline the inputs and internals of korg, and compare synthetic spectra from korg, moog, t... | korg: a modern 1d lte spectral synthesis package |
the ultraviolet transient astronomical satellite (ultrasat) is a scientific space mission carrying an astronomical telescope. the mission is led by the weizmann institute of science (wis) in israel and the israel space agency (isa), while the camera in the focal plane is designed and built by deutsches elektronen synch... | sensor characterization for the ultrasat space telescope |
computational study of polycyclic aromatic hydrocarbons (pahs) with phenyl side group substituted at different positions is reported. the infrared spectral variations due to the position of phenyl substitution, ionization state and the size of the molecules are discussed and possible contribution of phenyl-pahs to the ... | study of vibrational spectra of polycyclic aromatic hydrocarbons with phenyl side group |
we present the analysis of two unusually red l dwarfs, cwise j075554.14-325956.3 (w0755-3259) and cwise j165909.91-351108.5 (w1659-3511), confirmed by their newly obtained near-infrared spectra collected with the triplespec4 spectrograph on the southern astrophysical research telescope. we classify w0755-3259 as an l7 ... | scarlet spectra: two red l dwarfs revealed by soar |
searches for phosphine in venus' atmosphere have sparked a debate. cordiner et al. 2022 analyse spectra from the stratospheric observatory for infrared astronomy (sofia) and infer <0.8 ppb of ph3. we noticed that some spectral artefacts arose from non-essential calibration-load signals. by-passing these signals allo... | recovery of phosphine in venus' atmosphere from sofia observations |
we report the first detection of the s(1) pure rotational line of ortho-h2 at 17.04 μm in an asymptotic giant branch star, using observations of irc+10216 with the echelon-cross-echelle spectrograph (exes) mounted on the stratospheric observatory for infrared astronomy. this line, which was observed in a very high-sens... | detection of the s(1) rotational line of h2 toward irc+10216: a simultaneous measurement of the mass-loss rate and co abundance |
a new mission about twenty years after gaia with similar astrometric performance would be important for all branches of astronomy. the two missions together would, e.g., give much more accurate motions of the common objects due to the large epoch difference. by adding a near-infrared (nir) capability to the new mission... | the gaia successor in 2021 |
we present a two-epoch hubble space telescope study of ngc 2071 ir highlighting hops 361-c, a protostar producing an arced 0.2 parsec-scale jet. the proper motions for the brightest knots decrease from 350 to 100 km s-1 with increasing distance from the source. the [fe ii] and paβ emission line intensity ratio gives a ... | hops 361-c's jet decelerating and precessing through ngc 2071 ir |
the infrared array camera (irac) on the spitzer space telescope currently offers the greatest potential for high-precision astrometry of faint mid-ir sources across arcminute-scale fields, which would be especially valuable for measuring parallaxes of cold brown dwarfs in the solar neighborhood and proper motions of ob... | measuring high-precision astrometry with the infrared array camera on the spitzer space telescope |
sample return missions hayabusa2 (jaxa) and osiris-rex (nasa) found evidence of hydrated silicates on the surface of c and b-type asteroids ryugu and bennu. this detection relied on the study of the 2.7 μm oh-stretching spectral feature revealed from remote sensing observations of the asteroids' surfaces. laboratory st... | geometry induced bias in the remote near-ir identification of phyllosilicates on space weathered bodies |
the gas phase vibrational spectrum of ch3cnh+ is investigated using a messenger infrared predissociation (irpd) action spectroscopic method. vibrational bands were recorded in the 300-1700 cm-1 and 2000-3300 cm-1 regions making use of the widely tunable free electron laser for infrared experiments, felix, coupled to a ... | infrared predissociation spectroscopy of protonated methyl cyanide, ch3cnh+ |
actively tunable, narrowband spectral filtering across arbitrary optical wavebands is highly desirable in a plethora of applications, from chemical sensing, hyperspectral imaging to infrared astronomy. yet, the ability to actively reconfigure the optical properties of a solid-state narrowband filter remains elusive. ex... | all-optical continuous tuning of phase-change plasmonic metasurfaces for multispectral thermal imaging |
astrotoolbox identifies and classifies astronomical objects with a focus on low-mass stars and ultra-cool dwarfs. it can search numerous catalogs, including simbad (measurements & references), allwise, gaia, sdss, among others, evaluates spectral type for main sequence stars including brown dwarfs, and provides sed... | astrotoolbox: java tools for identifying and classifying astronomical objects |
context. in the line-of-sight toward the do-type white dwarf rx j0503.9-2854, the density of the interstellar medium (ism) is very low, and thus the contamination of the stellar spectrum almost negligible. this allows us to identify many metal lines in a wide wavelength range from the extreme ultraviolet to the near in... | complete spectral energy distribution of the hot, helium-rich white dwarf rx j0503.9-2854 |
the mid-infrared emission spectra of a large variety of astronomical objects are dominated by the aromatic infrared bands (aibs), which are now widely accepted to originate from gaseous polycyclic aromatic hydrocarbons (pahs). it is believed that the astrophysically most relevant molecules are at least 40-50 carbon ato... | laboratory ir spectroscopy of protonated hexa-peri-hexabenzocoronene and dicoronylene |
the wide-field infrared explorer (wise) survey captured massive amounts of infrared astronomical object data, and different astronomical objects will show different characteristics. especially spiral galaxies that are richer in colour than other astronomical objects. in addition, the sloan digital sky survey (sdss) has... | unsupervised clustering and analysis of wise spiral galaxies |
we present the first observational constraint on the brackett-γ (brγ) recombination line emission associated with the supermassive black hole at the center of our galaxy, known as sgr a*. by combining 13 yr of data with the adaptive optics fed integral field spectrograph osiris at the w. m. keck observatory obtained as... | upper limit on brackett-γ emission from the immediate accretion flow onto the galactic black hole |
imaging spectroscopy has seen rapid progress over the past 25 years, leading to breakthroughs in many fields of astronomy that would not have been otherwise possible. this review overviews the visible/infrared imaging spectroscopy techniques as well as energy-resolving detectors. we introduce the working principle of s... | visible/infrared imaging spectroscopy and energy-resolving detectors |
we present a study of the diffuse x-ray emission from the star-forming region lmc-n 57 in the large magellanic cloud. we use archival xmm-newton observations to unveil in detail the distribution of hot bubbles in this complex. x-ray emission is detected from the central superbubble (sb) dem l 229, the supernova remnant... | dissecting the hot bubbles in lmc-n57 with xmm-newton |
the european far-infrared (fir) space roadmap focuses on fundamental, yet still unresolved, astrophysical questions that can only be answered through a far-infrared space mission and gives an overview of the technology required to answer them. the document discusses topics ranging from solar system and planet formation... | the european far-infrared space roadmap |
we use deep multi-epoch point-spread function (psf) photometry taken with the visible and infrared survey telescope for astronomy (vista) to measure and analyze the proper motions of stars within the galactic globular cluster 47 tucanae (47 tuc, ngc 104). the observations are part of the ongoing near-infrared vista sur... | the vmc survey. xxviii. improved measurements of the proper motion of the galactic globular cluster 47 tucanae |
we present hk spectra of three sources located in the n 66 region of the small magellanic cloud. the sources display prominent stellar brγ and extended h2 emission, and exhibit infrared excesses at λ > 2 μm. based on their spectral features, and photometric spectral energy distributions, we suggest that these source... | massive young stellar objects in the n 66/ngc 346 region of the smc |
we present a brief description of the activities of the infrared astronomy group of tata institute of fundamental research with special emphasis on the ground-based near infrared instrumentation for star formation studies. we describe the unique capability of tircam2 for observations in the polycyclic aromatic hydrocar... | prospects for star formation studies with infrared instruments (tircam2 and tanspec) on the 3.6-m devasthal optical telescope |
in this contribution, we present webplotdigitizer, a polyvalent and free software developed to facilitate easy and accurate data extraction from a variety of plot types. we describe the numerous features of this numerical tool and present its relevance when applied to astrophysical archival research. we exploit webplot... | webplotdigitizer, a polyvalent and free software to extract spectra from old astronomical publications: application to ultraviolet spectropolarimetry |
the discovery by advanced ligo/virgo of gravitational waves from the binary neutron star merger gw170817, and subsequently by astronomers of transient emission across the electromagnetic spectrum, has initiated a new era of multi-messenger gravitational wave astronomy. here i summarize the electromagnetic discoveries i... | lessons from the light of a neutron star merger |
radar observations from the earth and multi-instrument measurements by messenger mission have indicated the presence of large quantities of ices within the permanent shadowed regions (psrs) located at mercury poles. the detection and mapping of the distribution of volatile species on psrs are among the primary scientif... | temporal evolution of the permanent shadowed regions at mercury poles: applications for spectral detection of ices by simbiosys-vihi on bepicolombo mission |
we present κ andromeda b’s photometry and astrometry taken with subaru/scexao+hiciao and keck/nirc2, combined with recently published scexao/charis low-resolution spectroscopy and published thermal infrared photometry to further constrain the companion’s atmospheric properties and orbit. the y/y-k colors of κ and b are... | atmospheric characterization and further orbital modeling of κ andromeda b |
several concepts for heliospheric missions operating at heliocentric distances far beyond earth orbit are currently investigated by the scientific community. the mission concept of the interstellar probe, e.g., aims at reaching a distance of 1000 au away from the sun within this century. this would allow the coming gen... | an empirical model of energetic neutral atom imaging of the heliosphere and its implications for future heliospheric missions at great heliocentric distances |
in this work we study in details the influence of pure astronomical refraction on solar metrological measurements made from ground-based full disc imagery and provide the tools for correcting the measurements and estimating the associated uncertainties. for a given standard atmospheric model, we first use both analytic... | on the importance of astronomical refraction for modern solar astrometric measurements |
we present results of the clustering analysis between active galactic nuclei (agns) and galaxies at redshift 0.1-1.0, which was performed to investigate the properties of galaxies associated with the agns and reveal the nature of the fueling mechanism of supermassive black holes (smbhs). we used 8059 agns/quasi-stellar... | properties of galaxies around agns with the most massive supermassive black holes revealed by clustering analysis |
as astronomical observations from space benefit from improved sensitivity, the effectiveness of scientific programs is becoming limited by systematics that often originate in poorly understood image sensor behavior. traditional, bottom-up detector characterization methods provide one way to model underlying detector ph... | precision projector laboratory: detector characterization with an astronomical emulation testbed |
adaptive optics (ao) is a key technology for ground-based optical and infrared astronomy, providing high angular resolution and sensitivity. ao systems employing laser guide stars (lgs) can achieve high sky coverage, but their performance is limited by lgs return flux. we examine the potential of two new approaches tha... | can amplified spontaneous emission produce intense laser guide stars for adaptive optics? |
context. the potentially hazardous asteroid (pha) (357439) 2004 bl86 grazed earth on january 26, 2015 at a distance of about 1.2 million km. this favorable geometry allowed observing it to derive its physical and dynamical parameters. (357439) 2004 bl86 was previously estimated to be a 500-m body. we study it also cons... | characterization of (357439) 2004 bl86 on its close approach to earth in 2015 |
the liverpool telescope is one of the world's premier facilities for time domain astronomy. the time domain landscape is set to radically change in the coming decade, with synoptic all-sky surveys such as lsst providing huge numbers of transient detections on a nightly basis; transient detections across the electromagn... | liverpool telescope 2: a new robotic facility for rapid transient follow-up |
to measure the stellar and orbital properties of the metal-poor rs cvn binary o draconis (o dra), we directly detect the companion using interferometric observations obtained with the michigan infrared combiner at georgia state university's center for high angular resolution astronomy (chara) array. the h-band flux rat... | detecting the companions and ellipsoidal variations of rs cvn primaries. ii. o draconis, a candidate for recent low-mass companion ingestion |
recent massive sky surveys in different bandwidths are providing new opportunities to modern astronomy. the virtual observatory (vo) represents the adequate framework to handle the huge amount of information available and filter out data according to specific requirements. in this work, we applied a selection strategy ... | a search for new hot subdwarf stars by means of virtual observatory tools ii |
the 0.5-m antarctic survey telescopes (ast3) were designed for time-domain optical/infrared astronomy. they are located in dome a, antarctica, where they can take advantage of the continuous dark time during winter. since the site is unattended in winter, everything for the operation, from observing to data reduction, ... | automation of the ast3 optical sky survey from dome a, antarctica |
we present observations of velocity-resolved [c ii] 158 μm emission from both a dense and a more diffuse photodissociation region (pdr) in the perseus giant molecular cloud using the heterodyne instrument for the far-infrared on board the herschel space telescope. we detect [c ii] emission from 80% of the total positio... | herschel 158 μm [{c} {ii}}] observations of "co-dark" gas in the perseus giant molecular cloud |
we describe the results of principal component analysis (pca) of up-the-ramp sampled infrared (ir) array data from the hubble space telescope wide field camera 3 (wfc3 ir), james webb space telescope nirspec, and prototype wide field infrared survey telescope's wide field instrument detectors. these systems use, respec... | principal component analysis of up-the-ramp sampled infrared array data |
we present hyperion, a mission concept recently proposed to the december 2021 nasa medium explorer announcement of opportunity. hyperion explores the formation and destruction of molecular clouds and planet-forming disks in nearby star-forming regions of the milky way. it does this using long-slit high-resolution spect... | hyperion: the origin of the stars. a far uv space telescope for high-resolution spectroscopy over wide fields |
near-earth asteroids (neas) are excellent laboratories for processes that affect airless body surfaces. s-complex (including v-type) neas were not expected to contain oh/h2o on their surfaces because they formed in the anhydrous regions of the solar system and their surface temperatures are high enough to remove these ... | 3 μm spectroscopic survey of near-earth asteroids |
infrared emission features at 3.3, 6.2, 7.7, 8.6, and 11.2 µm, attributed to polycyclic aromatic hydrocarbons (pahs), show variations in relative intensity, shape, and peak position. these variations depend on the physical conditions of the photodissociation region (pdr) in which strong pah emission arises but their re... | characterizing spatial variations of pah emission in the reflection nebula ngc 1333 |
asymptotic giant branch stars create a rich inventory of molecules in their envelopes as they lose mass during later stages of their evolution. these molecules cannot survive the conditions in interstellar space, where they are exposed to ultraviolet photons of the interstellar radiation field. as a result, daughter mo... | ionized carbon around irc+10216 |
comparison of échelle spectra to synthetic models has become a computational statistics challenge, with over 10,000 individual spectral lines affecting a typical cool star échelle spectrum. telluric artifacts, imperfect line lists, inexact continuum placement, and inflexible models frustrate the scientific promise of t... | an interpretable machine-learning framework for modeling high-resolution spectroscopic data |
using archival data from the chandra x-ray telescope, we have measured the spatial extent of the hot interstellar gas in a sample of 49 nearby interacting galaxy pairs, mergers, and merger remnants. for systems with sfr > 1 m ⊙ yr-1, the volume and mass of hot gas are strongly and linearly correlated with the star f... | the hot gas exhaust of starburst engines in mergers: testing models of stellar feedback and star formation regulation |
in the coming decade, a new generation of massively multiplexed spectroscopic surveys, such as the prime focus spectrograph galaxy evolution survey (pfs), wide area vista extragalactic survey-deep (waves), and multi-object optical and near-infrared spectrograph (moons) for the very large telescope, will probe galaxies ... | climber: galaxy-halo connection constraints from next-generation surveys |
a compact and robust broadband light source is desirable for frequency combs, and broadband infrared microscopy. to address these demanding problems, we report the generation of broadband spectroscopy using highly nonlinear dispersion-shifted fiber (hnl-dsf) in an all-fiber system without any free-space optics instrume... | 500-nm broadband light generation in highly nonlinear dispersion shifted fiber by soliton laser |
our paper discusses the optical design of the origins space telescope. origins is one of four large missions under study in preparation for the 2020 decadal survey in astronomy and astrophysics. sensitive to the mid- and far-infrared spectrum (between 2.8 and 588 μm), origins sets out to answer a number of important sc... | optical design of the origins space telescope |
the development of high performance is essential for the realization of ultra-broadband imaging technology, which can be widely used in astronomy, medical health, defense and security, and many other applications. in this work, we demonstrate an ultra-broadband upconversion device based on a heterojunction interfacial ... | ultra-broadband frequency up-converter based on algaas\\gaas heterojunction detector |
context. from may 24-25, 2002, four spacecraft located in the solar wind at about 1 astronomical unit (au) measured plasma densities one to two orders of magnitude lower than usual. the density was so low that the flow became sub-alfvénic for four hours, and the alfvén mach number was as low as 0.4. consequently, the e... | over-expansion of a coronal mass ejection generates sub-alfvénic plasma conditions in the solar wind at earth |
the stratospheric observatory for infrared astronomy (sofia) is an airborne observatory for far-infrared astronomy stationed at the armstrong flight research center (afrc) in palmdale, ca, usa. although sofia flies at altitudes of ~41,000 ft, any far-infrared observations from within the earth's atmosphere are neverthe... | probing the atmospheric precipitable water vapor with sofia, part iii. atlas of seasonal median pwv maps from era5, implications for fifi-ls and in situ comparison between the era5 and merra-2 atmospheric re-analyses |
we investigated the absorption spectra of crystalline plagioclase feldspar, using natural and synthetic samples with a wide compositional range, in the infrared region. and we also carried out cryogenic measurements for synthetic anorthite. in the absorption spectra, systematic spectroscopic variations that depend on t... | infrared absorption spectra of plagioclase feldspar: dependencies of composition and temperature |
large ground and space-based surveys in optical and near-infrared (nir) wavelengths will revolutionize astronomy in the coming decade. unfortunately, no ultraviolet (uv) facilities are planned to complement these surveys, which is crucial for studying the most active phase of the universe that includes star formation i... | indian spectroscopic and imaging space telescope (insist): an optics design trade-off study |
silicon mononitride (28si14n, 29si14n, 30si14n, 28si15n) line lists covering infrared, visible, and ultraviolet regions are presented. the sinful line lists produced by exomol include rovibronic transitions between six electronic states: $x\, {}^{2}\sigma ^{+}$, $a\, {}^{2}\pi$, $b\, {}^{2}\sigma ^{+}$, $d\, {}^{2}\del... | exomol line lists - xlvi. empirical rovibronic spectra of silicon mononitrate (sin) covering the six lowest electronic states and four isotopologues |
the program astronomy european infrared detector (asteroid), funded by the european union through h2020 (under grant agreement n°730161), aims at enabling europe to acquire the technology and knowledge necessary to manufacture 2k² high performance ir detectors. to reach these goals 9 detectors have been manufactured at... | asteroid and alfa programs: to equip europe with high performance ir detectors for space applications |
an urgent demand remains in astronomy for high-reflectivity silver mirrors that can withstand years of exposure in observatory environments. the university of california observatories astronomical coatings lab has undertaken development of protected silver coatings suitable for telescope mirrors that maintain high refl... | corrosion protection of silver-based telescope mirrors using evaporated anti-oxidation overlayers and aluminum oxide films by atomic layer deposition |
we have demonstrated in the laboratory multiple, fully functional, kilopixel, bolometer arrays for the upgraded instrument, the high-resolution airborne wideband camera plus (hawc+), for the stratospheric observatory for infrared astronomy (sofia). each kilopixel array consists of three individual components assembled ... | superconducting pathways through kilopixel backshort-under-grid arrays |
infrared astronomy, particularly in spectroscopy, could benefit in a decisive way from an implementation of telescopes on the moon since the largest telescopes on earth are practically limited to 40 m and in space to 10 m. on the moon, a collector larger than on earth becomes conceivable, thanks to the low gravity and ... | is the moon the future of infrared astronomy? |
aims: in this paper we investigate the detectability of the molecular oxygen in icy dust grain mantles towards astronomical objects.methods: we present a systematic set of experiments with o2-h2o ice mixtures designed to disentangle how the molecular ratio affects the o2 signature in the mid- and near-infrared spectral... | o2 signature in thin and thick o2-h2o ices⋆ |
since their discovery in 1991, carbon nanotubes (cnts) - a novel one-dimensional carbon allotrope - have attracted considerable interest worldwide because of their potential technological applications such as electric and optical devices. in the astrophysical context, cnts may be present in the interstellar space since... | on carbon nanotubes in the interstellar medium |
molecular spectroscopy is a powerful tool for accelerating advances in materials science, chemistry, biology, and astronomy. typically, molecular spectroscopy uses nanotips or nanoparticles to locally detect the molecule properties in a sample resulting from absorption of infrared and terahertz radiations. here, we pre... | localized-plasma-assisted rotational transitions in the terahertz region |
the herschel extragalactic legacy project (help) brings together a vast range of data from many astronomical observatories. its main focus is on the herschel data, which maps dust-obscured star formation over 1300 deg2. with this unprecedented combination of data sets, it is possible to investigate how the star formati... | help*: star formation as a function of galaxy environment with herschel† |
using the akari, wide-field infrared survey explorer (wise), infrared astronomical satellite (iras), sloan digital sky survey (sdss) and hubble space telescope (hst) data, we investigated the relation of polycyclic aromatic hydrocarbon (pah) mass (mpah), very small grain mass (mvsg), big grain mass (mbg) and stellar ma... | a relationship of polycyclic aromatic hydrocarbon features with galaxy merger in star-forming galaxies at z < 0.2 |
polycyclic aromatic hydrocarbons (pahs) are generally believed to be ubiquitous in space and responsible for numerous telltale interstellar infrared emission bands. in sandford et al., we suggested that pahs with excess hydrogenation at their periphery ({{{h}}}{{n}}-pahs) may be an important subclass of these molecules... | the detection of 6.9 μm emission features in the infrared spectra of iras 04296+3429, iras 05341+0852, and iras 22272+5435: evidence for the presence of hn-pahs in post-agb stars |
we observed the occultation by pluto of a 12th magnitude star, one of the two brightest occultation stars ever in our dozen years of continual monitoring of pluto's atmosphere through such studies, on 2015 june 29 utc. at the univ. of canterbury mt. john observatory (new zealand), under clear skies throughout, we used ... | pluto occultation on 2015 june 29 utc with central flash and atmospheric spikes just before the new horizons flyby |
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