abstract stringlengths 3 192k | title stringlengths 4 857 |
|---|---|
we used data from the near-infrared visible and infrared telescope for astronomy (vista) survey of the magellanic cloud system (vmc) to measure proper motions (pms) of stars within the small magellanic cloud (smc). the data analysed in this study comprise 26 vmc tiles, covering a total contiguous area on the sky of ∼40... | the vmc survey - xli. stellar proper motions within the small magellanic cloud |
the superpressure balloon-borne imaging telescope (superbit) is a diffraction-limited, wide-field, 0.5 m, near-infrared to near-ultraviolet observatory designed to exploit the stratosphere's space-like conditions. superbit's 2023 science flight will deliver deep, blue imaging of galaxy clusters for gravitational lensin... | lensing in the blue. ii. estimating the sensitivity of stratospheric balloons to weak gravitational lensing |
we present the largest and most homogeneous collection of near-infrared (nir) spectra of type ia supernovae (sne ia): 339 spectra of 98 individual sne obtained as part of the carnegie supernova project-ii. these spectra, obtained with the fire spectrograph on the 6.5 m magellan baade telescope, have a spectral range of... | carnegie supernova project. ii. near-infrared spectral diversity and template of type ia supernovae |
the physical processes occurring within the inner few astronomical units of protoplanetary disks surrounding herbig ae stars are crucial to setting the environment in which the outer planet-forming disk evolves and put critical constraints on the processes of accretion and planet migration. we present the most complete... | probing the inner disk emission of the herbig ae stars hd 163296 and hd 190073 |
we present the largest survey of spectrally resolved mid-infrared water emission to date, with spectra for 11 disks obtained with the michelle and texes spectrographs on gemini north. water emission is detected in six of eight disks around classical t tauri stars. water emission is not detected in the transitional disk... | a high-resolution mid-infrared survey of water emission from protoplanetary disks |
aims: determining the intensity of lines and continuum airglow emission in the h-band is important for the design of faint-object infrared spectrographs. existing spectra at low or medium resolution cannot disentangle the true sky continuum from instrumental effects (e.g. diffuse light in the wings of strong lines). we... | lines and continuum sky emission in the near infrared: observational constraints from deep high spectral resolution spectra with giano-tng |
the newfound ability to detect so2 in exoplanet atmospheres presents an opportunity to measure sulfur abundances and so directly test between competing modes of planet formation. in contrast to carbon and oxygen, whose dominant molecules are frequently observed, sulfur is much less volatile and resides almost exclusive... | volatile-to-sulfur ratios can recover a gas giant's accretion history |
we introduce the state-of-the-art deep-learning denoising diffusion probabilistic model as a method to infer the volume or number density of giant molecular clouds (gmcs) from projected mass surface density maps. we adopt magnetohydrodynamic simulations with different global magnetic field strengths and large-scale dyn... | denoising diffusion probabilistic models to predict the density of molecular clouds |
in this paper, we consider a method for determining the coefficients of the transformation equations between different photometric systems based on the photometry of all field stars recorded during observations of the primary standards of one of the photometric systems. using this method, the coefficients of color tran... | color transformation equations between photometric systems of the 2mass catalog and the astronircam camera of the sai msu 2.5-m telescope |
we present a catalog of 3339 hot emission-line stars (elss) identified from 451 695 o, b and a type spectra, provided by lamost data release 5 (dr5). we developed an automated python routine that identified 5437 spectra having a peak between 6561 and 6568 å. false detections and bad spectra were removed, leaving 4138 g... | discovery of 2716 hot emission-line stars from lamost dr5 |
we present a study of metallicities in a sample of main-sequence stars with spectral types m, k, g, and f (teff ~3200-6500k and log g ~ 4.3-5.0 dex) belonging to the solar neighborhood young open cluster coma berenices. metallicities were determined using the high-resolution (r = λ/δ λ ~ 22,500) nir spectra (λ1.51-λ1.6... | a metallicity study of f, g, k, and m dwarfs in the coma berenices open cluster from the apogee survey |
we report the discovery of a compton-thick (ct), dust-obscured galaxy at z = 0.89, wise j082501.48+300257.2 (wise 0825+3002), observed by the nuclear spectroscopic telescope array. x-ray analysis with the xclumpy model revealed that hard x-ray luminosity in the rest-frame 2-10 kev band of wise 0825+3002 is l x (2-10 ke... | nustar discovery of a compton-thick, dust-obscured galaxy: wise j0825+3002 |
solar flares are sudden flashes of brightness on the sun and are often associated with coronal mass ejections and solar energetic particles that have adverse effects on the near-earth environment. by definition, flares are usually referred to as bright features resulting from excess emission. using the newly commission... | ultra-narrow negative flare front observed in helium-10830 å using the 1.6 m new solar telescope |
context. the wide-field infrared survey explorer (wise) has detected hundreds of millions of sources over the entire sky. classifying them reliably is, however, a challenging task owing to degeneracies in wise multicolour space and low levels of detection in its two longest-wavelength bandpasses. simple colour cuts are... | towards automatic classification of all wise sources |
we present a highly frequency multiplexed readout for large-format superconducting detector arrays intended for use in the next generation of balloon-borne and space-based sub-millimeter and far-infrared missions. we will demonstrate this technology on the upcoming nasa next generation balloon-borne large aperture sub-... | an open source, fpga-based lekid readout for blast-tng: pre-flight results |
we present infrared spectral indices (1.0-2.3 μm) of galactic late-type giants and red supergiants (rsgs). we used existing and new spectra obtained at resolution power r = 2000 with spex on the irtf telescope. while a large co equivalent width (ew), at 2.29 μm ([co, 2.29] ≳ 45 å) is a typical signature of rsgs later t... | new infrared spectral indices of luminous cold stars: from early k to m types |
we present the [c ii] 157.7 μm map of galaxy ngc 7331 obtained with the field-imaging far-infrared line spectrometer on board the stratospheric observatory for infrared astronomy (sofia). this map extends an existent herschel/photodetector array camera and spectrometer observation of the central strip of the galaxy to ... | [c ii] map of the molecular ring and arms of the spiral galaxy ngc 7331 |
recent astronomical observations and planetary missions have found that complex organics are prevalent throughout the universe, from the solar system to distant galaxies. however, the detailed chemical composition and the synthesis pathway of these organics are still unclear. circumstellar envelopes represent excellent... | on the nature of organic dust in novae |
in this paper we describe an unmanned aerial system equipped with a thermal-infrared camera and software pipeline that we have developed to monitor animal populations for conservation purposes. taking a multi-disciplinary approach to tackle this problem, we use freely available astronomical source detection software an... | adapting astronomical source detection software to help detect animals in thermal images obtained by unmanned aerial systems |
context. hd 72946 is a bright and nearby solar-type star hosting a low-mass companion at long period (p ∼ 16 yr) detected with the radial velocity (rv) method. the companion has a minimum mass of 60.4 ± 2.2 mj and might be a brown dwarf. its expected semi-major axis of ∼243 mas makes it a suitable target for further ch... | a dusty benchmark brown dwarf near the ice line of hd 72946 |
we present near-infrared observations of 35 of the most massive early-type galaxies in the local universe. the observations were made using the infrared channel of the hubble space telescope wide field camera 3 (wfc3) in the f110w (1.1 μm) filter. we measured surface brightness profiles and elliptical isophotal fit par... | the massive survey. ix. photometric analysis of 35 high-mass early-type galaxies with hst wfc3/ir |
context. gas giants accrete their envelopes from the gas and dust of proto-planetary disks, and therefore it is important to determine the composition of the inner few astronomical units, where most giant planets are expected to form.aims: we aim to constrain the elemental carbon and oxygen abundance in the inner disk ... | the dry and carbon-poor inner disk of tw hydrae: evidence for a massive icy dust trap |
we present a study of the wind-launching region of the herbig be star hd 58647 using high angular (λ/2b = 0.003 arcsec) and high spectral (r = 12 000) resolution interferometric very large telescope interferometer (vlti)-astronomical multi-beam combiner (amber) observations of the near-infrared hydrogen emission line, ... | probing the wind-launching regions of the herbig be star hd 58647 with high spectral resolution interferometry |
the unification theory of active galactic nuclei (agns) hypothesizes that all agns are surrounded by an anisotropic dust torus and are essentially the same objects but viewed from different angles. however, little is known about the dust that plays a central role in the unification theory. there are suggestions that th... | silicate dust in active galactic nuclei |
we present a statistical study of the orientation of outflows with respect to large-scale filaments and magnetic fields. although filaments are widely observed toward galactic star-forming regions, the exact role of filaments in star formation is unclear. studies toward low-mass star-forming regions revealed both prefe... | alma observations reveal no preferred outflow-filament and outflow-magnetic field orientations in protoclusters |
hub-filament systems (hfss) are potential sites of protocluster and massive star formation, and play a key role in mass accumulation. we report jcmt pol-2 850 μm polarization observations toward the massive hfs sdc13. we detect an organized magnetic field near the hub center with a cloud-scale "u-shape" morphology foll... | formation of the sdc13 hub-filament system: a cloud-cloud collision imprinted on the multiscale magnetic field |
characterization techniques available for bulk or thin-film solid-state materials have been extended to substrate-supported nanomaterials, but generally non-quantitatively. this is because the nanomaterial signals are inevitably buried in the signals from the underlying substrate in common reflection-configuration tech... | virtual substrate method for nanomaterials characterization |
the atmosphere of titan, the largest moon of saturn, is rich in organic molecules, and it has been suggested that the moon may serve as an analog for the pre-biotic earth due to its highly reducing chemistry and existence of global hazes. photochemical models of titan have predicted the presence of propadiene (historic... | detection of propadiene on titan |
the global d/h ratio on mars is an important measurement for understanding the past history of water on mars; locally, through condensation and sublimation processes, it is a possible tracer of the sources and sinks of water vapor on mars. measuring d/h as a function of longitude, latitude and season is necessary for d... | new measurements of d/h on mars using exes aboard sofia |
we present our second set of results from our mid-infrared imaging survey of milky way giant h ii regions. we used the forcast instrument on the stratospheric observatory for infrared astronomy (sofia) to obtain 20 and 37 μm images of the central ∼10' × 10' area of m17. we investigate the small- and large-scale propert... | surveying the giant h ii regions of the milky way with sofia. ii. m17 |
context. the atmospheric absorption of the earth is an important limiting factor for ground-based spectroscopic observations and the near-infrared and infrared regions are the most affected. several software packages that produce a synthetic atmospheric transmission spectrum have been developed to correct for the tellu... | telluric correction in the near-infrared: standard star or synthetic transmission? |
near- and mid-infrared interferometers have resolved the dusty parsec-scale obscurer (torus) around nearby active galactic nuclei (agns). with the arrival of extremely large single-aperture telescopes, the emission morphology will soon be resolvable unambiguously, without modeling directly the underlying brightness dis... | hypercubes of agn tori (hypercat). i. models and image morphology |
strong gravitational lensing is an ideal tool for mapping the distribution of dark matter and for testing the values of cosmological parameters. forthcoming surveys such as euclid and the rubin observatory large synoptic telescope survey should increase the number of known strong lensing systems significantly, with for... | predictions for strong-lens detections with the nancy grace roman space telescope |
ground-based near-infrared (nir) astronomy is severely hampered by the forest of atmospheric emission lines resulting from the rovibrational decay of oh molecules in the upper atmosphere. the extreme brightness of these lines, as well as their spatial and temporal variability, makes accurate sky subtraction difficult. ... | first demonstration of oh suppression in a high-efficiency near-infrared spectrograph |
context. galaxy interactions and mergers can lead to supermassive black hole (smbh) binaries, which become active galactic nucleus (agn) pairs when the smbhs start accreting mass. if there is a third galaxy involved in the interaction, then a triple-agn system can form.aims: our goal is to investigate the nature of the... | a triple active galactic nucleus in the ngc 7733-7734 merging group |
infrared excesses around white dwarf stars indicate the presence of various astrophysical objects of interest, including companions and debris disks. in this second paper of a series, we present follow-up observations of infrared excess candidates from gaia and unwise discussed in the first paper, paper i. we report sp... | infrared excesses around bright white dwarfs from gaia and unwise. ii |
this paper presents results from photometric and statistical-parallax analysis of a sample of 850 field rr lyrae (rrl) variables. the photometric and spectroscopic data for our sample of rrls are obtained from (1) our new spectroscopic observations (for 448 rrls) carried out with the southern african large telescope; (... | kinematics and multiband period-luminosity-metallicity relation of rr lyrae stars via statistical parallax |
the mid-infrared instrument (miri) on the james webb space telescope (jwst), has imaging, four coronagraphs, and both low and medium resolution spectroscopic modes. being able to simulate miri observations will help commissioning of the instrument, as well as get users familiar with representative data. we designed the... | mirisim: a simulator for the mid-infrared instrument on jwst |
the discovery of a planet orbiting around proxima centauri, the closest star to the sun, opens new avenues for the remote observations of the atmosphere and surface of an exoplanet, proxima b. to date, three-dimensional (3d) general circulation models (gcms) are the best available tools to investigate the properties of... | three-dimensional climate simulations for the detectability of proxima centauri b |
the prominent infrared absorption band of solid co - commonly observed towards young stellar objects (ysos) - consists of three empirically determined components. the broad `red component' (2136 cm-1, 4.681 μm) is generally attributed to solid co mixed in a hydrogen-bonded environment. usually, co embedded in the abund... | spectroscopic constraints on ch3oh formation: co mixed with ch3oh ices towards young stellar objects |
the james webb space telescope (jwst) is now observing y dwarfs, the coldest known brown dwarfs, with effective temperatures t eff ≲ 475 k. the first published observations provide important information: not only is the atmospheric chemistry out of equilibrium, as previously known, but the pressure-temperature profile ... | the first y dwarf data from jwst show that dynamic and diabatic processes regulate cold brown dwarf atmospheres |
polycyclic aromatic hydrocarbon (pah) molecules have been long adjudged to contribute to the frequently detected distinct emission features at 3.3, 6.2, 7.7, 8.6, 11.2, and 12.7 μm with weaker and blended features distributed in the 3-20 μm region. the comparatively weaker 3.4 μm emission feature has been attributed to... | dft study on interstellar pah molecules with aliphatic side groups |
the molecular ion h3 + is a potentially powerful tracer of the ionospheres and thermal structures of jovian planets but has never been detected in a planetary mass object outside of the solar system. models predict that h3 + emission driven by euv flux and solar wind on hot jupiters, or by powerful aurorae on brown dwa... | limits on the auroral generation of h3 + in brown dwarf and extrasolar giant planet atmospheres with the keck near infrared echelle spectrograph |
we present the discovery and validation of a temperate sub-neptune around the nearby mid-m dwarf tic 470381900 (toi-1696), with a radius of 3.09 ± 0.11 r ⊕ and an orbital period of 2.5 days, using a combination of transiting exoplanets survey satellite (tess) and follow-up observations using ground-based telescopes. jo... | toi-1696: a nearby m4 dwarf with a 3 r ⊕ planet in the neptunian desert |
we present a spitzer/herschel focused survey of the aquila molecular clouds (d ~ 436 pc) as part of the ehops (extension of the herschel orion protostar survey, or hops, out to 500 parsecs) census of nearby protostars. for every source detected in the herschel/pacs bands, the ehops-aquila catalog contains 1-850 μm seds... | extension of hops out to 500 pc (ehops). i. identification and modeling of protostars in the aquila molecular clouds |
searches for phosphine in venus' atmosphere have sparked a debate. cordiner et al. (2022, https://doi.org/10.1029/2022gl101055) analyze spectra from the stratospheric observatory for infrared astronomy (sofia) and infer <0.8 ppb of ph3. we noticed that some spectral artifacts arose from non-essential calibration-loa... | comment on "phosphine in the venusian atmosphere: a strict upper limit from sofia great observations" by cordiner et al. |
aims: we investigate the possible role of polycyclic aromatic hydrocarbons (pahs) as a sink for deuterium in the interstellar medium (ism) and study uv photolysis as a potential underlying chemical process in the variations of the deuterium fractionation in the ism.methods: the uv photo-induced fragmentation of various... | photolysis-induced scrambling of pahs as a mechanism for deuterium storage |
the recent advancements in far-infrared (far-ir) astronomy brought about by the herschel, sofia, and alma observatories have led to technological advancements in millimeterwave and submillimeterwave laboratory spectroscopy that is used to support molecular observations. this review gives an overview of rotational spect... | millimeterwave and submillimeterwave laboratory spectroscopy in support of observational astronomy |
in the relatively shielded environments provided by interstellar dense clouds in our galaxy, infrared astronomical observations have early revealed the presence of low temperature (10-100 k) ice mantles covering tiny grain "cores" composed of more refractory material. these ices are of specific interest because they co... | swift heavy ion modifications of astrophysical water ice |
sulphur trioxide (so3) is a trace species in the atmospheres of the earth and venus, as well as being an industrial product and an environmental pollutant. a variational line list for 32s16o3, named uyt2, is presented containing 21 billion vibration-rotation transitions. uyt2 can be used to model infrared spectra of so... | exomol molecular line lists - xvii. the rotation-vibration spectrum of hot so3 |
carbon monoxide (co) is the second most abundant molecule in the gas phase of the interstellar medium. in dense molecular clouds, it is also present in the solid phase as a constituent of the mixed water-dominated ices covering dust grains. its presence in the solid phase is inferred from its infrared (ir) signals. in ... | ir spectral fingerprint of carbon monoxide in interstellar water-ice models |
we have developed a common user interface for running the data reduction software for multiple instruments for the stratospheric observatory for infrared astronomy (sofia). this interface, called redux, provides a gui for processing the data from three instruments (exes, forcast, and flitecam) in their various modes (i... | redux: a common interface for sofia data reduction pipelines |
we present the results of surveying [c i] 3p1-3p0, 12co j = 4 - 3, and 630 μm dust continuum emission for 36 nearby ultra/luminous infrared galaxies (u/lirgs) using the band 8 receiver mounted on the atacama compact array of the atacama large millimeter/submillimeter array. we describe the survey, observations, data re... | an aca survey of [c i] 3p1-3p0, co j = 4 - 3, and dust continuum in nearby u/lirgs |
luminous red variables are most likely eruptions that are the outcome of stellar mergers. v838 mon is one of the best-studied members of this class, representing an archetype for stellar mergers resulting from b-type stars. as result of the merger event, "nova-like" eruptions occur driving mass loss from the system. as... | the infrared evolution of dust in v838 monocerotis |
context. infrared spectroscopy of star and planet forming regions is at the dawn of a new age with the upcoming james webb space telescope (jwst). its high resolution and unprecedented sensitivity allows us to probe the chemical complexity of planet forming regions, such as dense clouds, embedded protostars, and protop... | infrared spectra of complex organic molecules in astronomically relevant ice matrices. iii. methyl formate and its tentative solid-state detection |
the use of infrared spectra to determine molecular abundances of icy astronomical objects and to study their chemistry requires laboratory measurements of reference spectra and related quantities, such as the index of refraction (n) and density (ρ) of candidate ices. here we present new n and ρ measurements on ices inv... | testing densities and refractive indices of extraterrestrial ice components using molecular structures—organic compounds and molar refractions |
we investigate the origin of self-absorption in [o i] 63 μm line emission, which is very clearly seen in approximately half of the 12 galactic giant molecular cloud (gmc)/h ii regions observed. for this study, we observed velocity-resolved spectra of photon-dominated region (pdr) and h ii region tracers, the [o i] 63 μ... | interstellar cloud conditions based on 63 μm [o i] emission and absorption in w3 |
here we present the analysis of multi-epoch secondary eclipse observations of hd 189733b and hd 209458b as a probe of temporal variability in the planetary climate using both spitzer channels 1 and 2 (3.6 and 4.5 μm). we expect hot-jupiter atmospheres to be dynamic environments exhibiting time varying weather. however,... | evaluating climate variability of the canonical hot-jupiters hd 189733b and hd 209458b through multi-epoch eclipse observations |
we present high-resolution near-infrared spectra taken during eight transits of 55 cancri e, a nearby low-density super-earth with a short orbital period (<18 hr). while this exoplanet's bulk density indicates a possible atmosphere, one has not been detected definitively. our analysis relies on the doppler cross-cor... | a near-infrared chemical inventory of the atmosphere of 55 cancri e |
we present the first high spectral resolution mid-infrared survey in the orion bn/kl region, covering 7.2-28.3 μm. with sofia/exes, we target the enigmatic source orion irc2. while this is in the most prolifically studied massive star-forming region, longer wavelengths and molecular emission lines dominated previous sp... | the mid-infrared molecular inventory toward orion irc2 |
the sloan digital sky survey iv apogee-2 primary science goal was to observe red giant stars throughout the galaxy to study its dynamics, morphology, and chemical evolution. the apogee instrument, a high-resolution 300-fiber h-band (1.55-1.71 μm) spectrograph, is also ideal to study other stellar populations in the gal... | stellar properties for a comprehensive collection of star-forming regions in the sdss apogee-2 survey |
we measure the 10 and 18 μm silicate features in a sample of 67 local (z < 0.1) type 1 active galactic nuclei (agn) with available spitzer spectra dominated by nonstellar processes. we find that the 10 μm silicate feature peaks at ${10.3}_{-0.9}^{+0.7}\,\mu {\rm{m}}$ with a strength (sip = ln fp(spectrum)/fp(continu... | modeling the strongest silicate emission features of local type 1 agns |
high angular resolution observations of young stellar objects are required to study the inner astronomical units of protoplanetary disks in which the majority of planets form. as they evolve, gaps open up in the inner disk regions and the disks are fully dispersed within ∼10 myr. mwc 614 is a pretransitional object wit... | a multi-instrument and multi-wavelength high angular resolution study of mwc 614: quantum heated particles inside the disk cavity |
we present a series of results from a clustering analysis of the first data release of the visible and infrared survey telescope for astronomy (vista) deep extragalactic observations (video) survey. video is the only survey currently capable of probing the bulk of stellar mass in galaxies at redshifts corresponding to ... | the galaxy-halo connection in the video survey at 0.5 < z < 1.7 |
context. cepheids are excellent tracers of young stellar populations. they play a crucial role in astrophysics as standard candles. the chemistry of classical cepheids in the milky way is now quite well-known, however despite a much larger sample, the chemical composition of magellanic cepheids has been only scarcely i... | detailed chemical composition of classical cepheids in the lmc cluster ngc 1866 and in the field of the smc |
we made near-infrared multicolor imaging observations of a disk around herbig be star hd 100546 using gemini/nici. k (2.2 μm), h2o ice (3.06 μm), and l‧ (3.8 μm) disk images were obtained and we found a 3.1 μm absorption feature in the scattered light spectrum, likely due to water ice grains at the disk surface. we com... | water ice at the surface of the hd 100546 disk |
we present the initial results and the source catalog from the nuclear spectroscopic telescope array (nustar) survey of the extended chandra deep field south (hereafter, ecdfs)—currently the deepest contiguous component of the nustar extragalactic survey program. the survey covers the full ≈30‧ × 30‧ area of this field... | the nustar extragalactic surveys: initial results and catalog from the extended chandra deep field south |
we present co (j = 1 → 0 3 → 2 5 → 4 10 → 9) and 1.2 kpc resolution [c ii] line observations of the dusty star-forming galaxy (sfg) hxmm05—carried out with the karl g. jansky very large array, the combined array for research in millimeter-wave astronomy, the plateau de bure interferometer, and the atacama large millime... | the ism properties and gas kinematics of a redshift 3 massive dusty star-forming galaxy |
we study the stellar halos of 0.2 ≲ z ≲ 0.5 galaxies with stellar masses spanning m* ~ 1010.5 to 1012m⊙ (approximately l* galaxies at this redshift) using imaging data from the cosmic infrared background experiment (ciber). a previous ciber fluctuation analysis suggested that intra-halo light (ihl) contributes a signif... | probing intra-halo light with galaxy stacking in ciber images |
we present a high-contrast imaging search for paβ line emission from protoplanets in the pds 70 system with keck/osiris integral field spectroscopy. we applied the high-resolution spectral differential imaging technique to the osiris j-band data but did not detect the paβ line at the level predicted using the parameter... | keck/osiris paβ high-contrast imaging and updated constraints on pds 70b |
unwise is a wide-ranging data analysis effort aimed at repurposing the combined wide-field infrared survey explorer (wise) plus neowise imaging archive for galactic and extragalactic astrophysics. we present updated static sky maps incorporating seven years of w1 (3.4 μm) and w2 (4.6 μm) single-exposure images, uniform... | full-sky unwise coadds at seven years' depth |
we present ultraviolet to near infrared spectroscopic observations of the quasar sdss j001514+184212 and its proximate molecular absorber at z = 2.631. the [o iii] emission line of the quasar is composed of a broad (fwhm ∼ 1600 km s-1), spatially unresolved component, blueshifted by about 600 km s-1 from a narrow, spat... | down-the-barrel observations of a multi-phase quasar outflow at high redshift. vlt/x-shooter spectroscopy of the proximate molecular absorber at z = 2.631 towards sdss j001514+184212 |
laboratory measurements are reported that enable a more accurate determination of the characteristics of the near-infrared absorptions of {{{c}}}60+ below 10 k. these data were obtained by photofragmentation of {{{c}}}60+{--}{he} complexes in a cryogenic trap. asymmetry in the profiles of the observed 9577 and 9632 å a... | isomeric and isotopic effects on the electronic spectrum of {{\\rm{c}}}_{60}^{+}-he: consequences for astronomical observations of {{\\rm{c}}}_{60}^{+} |
debris disk morphology is wavelength dependent due to the wide range of particle sizes and size-dependent dynamics influenced by various forces. resolved images of nearby debris disks reveal complex disk structures that are difficult to distinguish from their spectral energy distributions. therefore, multi-wavelength r... | the inner 25 au debris distribution in the ɛ eri system |
context. t tauri stars are low-mass young stars whose disks provide the setting for planet formation. despite this, their structure is poorly understood. we present new infrared interferometric observations of the su aurigae circumstellar environment that offer resolution that is three times higher and a better baselin... | dusty disk winds at the sublimation rim of the highly inclined, low mass young stellar object su aurigae |
the characterization of the intracluster medium (icm) properties of high-redshift galaxy clusters is fundamental to our understanding of large-scale structure formation processes. we present the results of a multiwavelength analysis of the very massive cluster moo j1142+1527 at a redshift z = 1.2 discovered as part of ... | unveiling the merger dynamics of the most massive madcows cluster at z = 1.2 from a multiwavelength mapping of its intracluster medium properties |
we report the discovery of a 10 comoving megaparsec (cmpc)-scale structure traced by massive submillimeter galaxies (smgs) at z ∼ 4.6. these galaxies are selected from an emission line search of alma band 7 observations targeting 184 luminous submillimeter sources (s850μm ≥ 6.2 mjy) across 1.6 degrees2 in the cosmos fi... | fir-luminous [c ii] emitters in the alma-scuba-2 cosmos survey (as2cosmos): the nature of submillimeter galaxies in a 10 comoving megaparsec-scale structure at z ∼ 4.6 |
context. in the near future, high spatial and spectral infrared (ir) data of star-forming regions obtained by the james webb space telescope may reveal new solid-state features of various species, including more intriguing classes of chemical compounds. the identification of complex organic molecules (coms) in the upco... | infrared spectra of complex organic molecules in astronomically relevant ice mixtures. iv. methylamine |
hot jupiters orbiting extremely close to their host star may experience atmospheric escape due to the large amounts of high-energy radiation they receive. understanding the conditions under which this occurs is critical, as atmospheric escape is believed to be a driving factor in sculpting planetary populations. in rec... | nondetection of helium in the hot jupiter wasp-48b |
context. the increasing sensitivity and resolution of ground-based telescopes have enabled the detection of gas-phase complex organic molecules (coms) across a variety of environments. many of the detected species are expected to form on the icy surface of interstellar grains and transfer later into the gas phase. ther... | infrared spectra of complex organic molecules in astronomically relevant ice mixtures. v. methyl cyanide (acetonitrile) |
the quest for other habitable worlds and the search for life among them are major goals of modern astronomy. one way to make progress towards these goals is to obtain high-quality spectra of a large number of exoplanets over a broad range of wavelengths. while concepts currently investigated in the united states are fo... | space-based infrared interferometry to study exoplanetary atmospheres |
the formation routes of two structural isomers—propenal (c2h3cho) and cyclopropanone (c-c3h4o)—were investigated experimentally by exposing ices of astrophysical interest to energetic electrons at 5.5 k thus mimicking the interaction of ionizing radiation with interstellar ices in cold molecular clouds. the radiation-i... | on the formation and isomer specific detection of propenal (c2h3cho) and cyclopropanone (c-c3h4o) in interstellar model ices - a combined ftir and reflectron time-of-flight mass spectroscopic study |
we present maps of surface composition of europa's anti-jovian hemisphere acquired using high spatial resolution ifu multispectral data from the sphere instrument on the very large telescope (0.95-1.65 μm) and the nims instrument on the galileo orbiter (0.7-5.2 μm). spectral modeling was performed using a markov chain ... | compositional mapping of europa using mcmc modeling of near-ir vlt/sphere and galileo/nims observations |
the pah model predicts many weak emission features in the 1-5 μm region that can resolve significant questions that it has faced since its inception in the mid-80s. these features contain fundamental information about the pah population that is inaccessible via the much stronger pah bands in the 5-20 μm region. apart f... | pah spectroscopy from 1 to 5 μm |
the galactic globular clusters (ggcs) located toward the galactic bulge have generally been excluded from large-scale photometric ggc surveys due to severe total and differential extinction. here we present an overview of a hubble space telescope (hst) program designed to obtain deep, high spatial resolution multiband ... | deep hubble space telescope imaging of globular clusters toward the galactic bulge: observations, data reduction, and color-magnitude diagrams |
the european space agency (esa) has an on-going interest in the development of new detectors and the continuous optimization of available detectors across the waveband for space instrumentation. this paper presents the status of current infrared image sensor development activities supported by the agency. | infrared image sensor developments supported by the european space agency |
context. the mass-loss process from evolved stars is a key ingredient for our understanding of many fields of astrophysics, including stellar evolution and the chemical enrichment of the interstellar medium (ism) via stellar yields. nevertheless, many questions are still unsolved, one of which is the geometry of the ma... | the vlti/midi view on the inner mass loss of evolved stars from the herschel mess sample |
we present combined array for research in millimeter-wave astronomy (carma) co (j=1\to 0) observations and herschel pacs spectroscopy, characterizing the outflow properties toward extremely young and deeply embedded protostars in the orion molecular clouds. the sample comprises a subset of the orion protostars known as... | characterizing the youngest herschel-detected protostars. ii. molecular outflows from the millimeter and the far-infrared |
colour-magnitude diagrams provide a convenient way of comparing populations of similar objects. when well populated with precise measurements, they allow quick inferences to be made about the bulk properties of an astronomic object simply from its proximity on a diagram to other objects. we present here a python toolki... | colour-magnitude diagrams of transiting exoplanets - iii. a public code, nine strange planets, and the role of phosphine |
iso-oph 2 is a wide-separation (240 au) binary system where the primary star harbors a massive (mdust ∼ 40 m⊕) ring-like disk with a dust cavity ∼50 au in radius and the secondary hosts a much lighter (mdust ∼ 0.8 m⊕) disk. as part of the high-resolution follow-up of the "ophiuchus disk survey employing alma" (odisea) ... | a tale of two transition disks: alma long-baseline observations of iso-oph 2 reveal two closely packed nonaxisymmetric rings and a ∼2 au cavity |
context. be stars are rapid rotators surrounded by a gaseous disk envelope whose origin is still under debate. this envelope is responsible for observed emission lines and large infrared excess.aims: to progress in the understanding of the physical processes involved in the disk formation, we estimate the disk paramete... | spectro-interferometric observations of a sample of be stars. setting limits to the geometry and kinematics of stable be disks |
spectra of hot methane were recorded using a tube furnace and a high-resolution fourier transform spectrometer. we obtained experimental absorption spectra in the 1.85-1.11 μm near-infrared region at eight temperatures ranging from 295 k up to 1000 k. we have converted these into an atlas of absorption cross sections a... | atlas of experimental and theoretical high-temperature methane cross sections from t = 295 to 1000 k in the near-infrared |
sofia is an airborne observatory for far-infrared astronomy. although sofia flies at altitudes of ∼41,000 feet, any far-infrared observations from within the earth's atmosphere are nevertheless hampered by water vapor absorbing the astronomical signal. the atmospheric parameter governing absorption is the total upward ... | probing the atmospheric precipitable water vapor with sofia. ii. atmospheric models from ecmwf |
we investigate an infrared-excess source called g2 or dusty s-cluster object (dso), which moves on a highly eccentric orbit around the galaxy's central black hole, sgr a*. we use, for the first time, near-infrared polarimetric imaging data to determine the nature and properties of the dso and obtain an improved ks-band... | polarized near-infrared light of the dusty s-cluster object (dso/g2) at the galactic center |
we report the current status of the development of our new detectors for far-infrared (fir) astronomy. we develop blocked-impurity-band (bib)-type ge detectors to realize large-format compact arrays covering a wide fir wavelength range up to 200 \upmu m. we fabricated ge junction devices of different physical parameter... | development of blocked-impurity-band-type ge detectors fabricated with the surface-activated wafer bonding method for far-infrared astronomy |
the rr lyrae (rrl) rich globular cluster m62 (ngc 6266) is one of the most massive globular clusters in the milky way, located in the dense region of the galactic bulge, where dynamical processes that affect the survival of globular clusters are maximized. using gaia second data release data we have found clear evidenc... | discovery of tidal rr lyrae stars in the bulge globular cluster m62 |
we report a ground-based detection of the [o i] 63 μm line in a z = 6.027 gravitationally lensed dusty star-forming galaxy (dsfg) g09.83808 using the atacama pathfinder experiment sepia 660 receiver, the first unambiguous detection of the [o i]63 line beyond redshift 3, and the first obtained from the ground. the [o i]... | first detection of the [o i] 63 μm emission from a redshift 6 dusty galaxy |
supernovae from core collapse of massive stars drive shocks into the molecular clouds from which the stars formed. such shocks affect future star formation from the molecular clouds, and the fast-moving, dense gas with compressed magnetic fields is associated with enhanced cosmic rays. this paper presents new theoretic... | supernova shocks in molecular clouds: velocity distribution of molecular hydrogen |
understanding the inner structure of the clumpy molecular torus surrounding the active galactic nucleus is essential in revealing the forming mechanism. however, spatially resolving the torus is difficult because of its size of a few parsecs. thus, to probe the clump conditions in the torus, we performed the velocity d... | study of the inner structure of the molecular torus in iras 08572+3915 nw with velocity decomposition of co rovibrational absorption lines |
this paper describes the near-infrared detector system noise generator (ng) that we wrote for the james webb space telescope (jwst) near infrared spectrograph (nirspec). ng simulates many important noise components including; (1) white "read noise," (2) residual bias drifts, (3) pink $1/f$ noise, (4) alternating column... | teledyne h1rg, h2rg, and h4rg noise generator |
Subsets and Splits
No community queries yet
The top public SQL queries from the community will appear here once available.