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infrared sky background level is an important parameter of infrared astronomy observations from the ground, particularly for a candidate site of an infrared capable observatory since low background level is required for such a site. the chinese astronomical community is looking for a suitable site for a future 12 m tel... | design of a multiband near-infrared sky brightness monitor using an insb detector |
the time-scales on which astronomical dust grows remain poorly understood, with important consequences for our understanding of processes like circumstellar disc evolution and planet formation. a number of post-asymptotic giant branch (agb) stars are found to host optically thick, dust- and gas-rich circumstellar discs... | rapid grain growth in post-agb disc systems from far-infrared and sub-millimetre photometry |
we address three major questions in astronomy, namely the detection of biosignatures on habitable exoplanets, the geophysics of exoplanets and cosmology. to achieve this goal, two requirements are needed. first a very large aperture to detect spectro-polarimetric and spatial features of faint objects such as exoplanets... | owl-moon : very high resolution spectro-imaging and earth-moon interferometry: exoplanets to cosmology |
formation processes of high-mass stars have been long-standing issues in astronomy and astrophysics. this is mainly because of major difficulties in observational studies such as a smaller number of high-mass young stellar objects (ysos), larger distances, and more complex structures in young high-mass clusters compare... | recent progress in high-mass star-formation studies with alma |
we analyze thermal emission spectra using the 2001 mars odyssey thermal emission imaging system and the mars global surveyor thermal emission spectrometer to characterize grain size and mineralogical composition of dunes at hargraves crater, mars. thermal inertia and bulk composition of the dunes were compared to infer... | thermophysical and compositional analyses of dunes at hargraves crater, mars |
with the aim of exploring the fast evolutionary path from the blue cloud of star-forming galaxies to the red sequence of quiescent galaxies in the local universe, we select a local advanced merging infrared luminous and ultraluminous galaxy (adv-merger (u)lirgs) sample and perform careful dust extinction corrections to... | the role of major gas-rich mergers on the evolution of galaxies from the blue cloud to the red sequence |
aims: we investigate the variability of the brightness distribution and the changing density structure of the protoplanetary disk around dr tau, a classical t tauri star. dr tau is known for its peculiar variations from the ultraviolet (uv) to the mid-infrared (mir). our goal is to constrain the temporal variation of t... | dr tauri: temporal variability of the brightness distribution in the potential planet-forming region |
context. high resolution stellar spectral atlases are valuable resources to astronomy. they are rare in the 1-5 μm region for historical reasons, but once available, high resolution atlases in this part of the spectrum will aid the study of a wide range of astrophysical phenomena.aims: the aim of the crires-pop project... | crires-pop: a library of high resolution spectra in the near-infrared. ii. data reduction and the spectrum of the k giant 10 leonis |
far-infrared polarized emission by means of magnetically aligned dust grains is an excellent tracer of the magnetic fields (b-fields) in the cold phase of the galactic outflows of starburst galaxies. we present a comprehensive study of the b-fields in three nearby (3.5-17.2 mpc) starbursts (m82, ngc 253, and ngc 2146) ... | the magnetic fields of starburst galaxies. i. identification and characterization of the thermal polarization in the galactic disk and outflow |
the recent detection of the gravitational-wave event gw170817, produced by the coalescence of two neutron stars, and of its optical-infrared counterpart, powered by the radioactive decay of r-process elements, has opened a new window onto gamma-ray astronomy: the direct detection of photons coming from such decays. her... | gamma-rays from kilonovae and the cosmic gamma-ray background |
a combination band due to a mechanism whereby a photon excites two or more vibrational modes (e.g., a bend and a stretch) of an individual molecule is commonly seen in laboratory and astronomical spectroscopy. here, we present evidence of a much less commonly seen combination band—one where a photon simultaneously exci... | a new two-molecule combination band as a diagnostic of carbon monoxide diluted in nitrogen ice on triton |
the large binocular telescope interferometer (lbti) has the longest baseline in the world|22.7 m|for performing astronomical interferometry in fizeau mode, which involves beam combination in a focal plane and preserves a wide field-of-view. lbti can operate in this mode at wavelengths of 1.5-5 and 8-12 μm, making it a ... | status of commissioning stabilized infrared fizeau interferometry with lbti |
building on the successful development of the 10-μm mercury cadmium telluride (hgcdte) detector arrays for the proposed neocam mission, the university of rochester infrared detector team and teledyne imaging systems are working together to extend the cutoff wavelength of hgcdte detector arrays initially to 13 μm, with ... | development of 13-μm cutoff hgcdte detector arrays for astronomy |
the 2018 perihelion passage of comet 46p/wirtanen afforded an opportunity to measure the abundances and spatial distributions of coma volatiles in a jupiter-family comet with exceptional spatial resolution for several weeks surrounding its closest approach to earth (δmin ∼0.078 au on ut december 16). we conducted near-... | the volatile composition of the inner coma of comet 46p/wirtanen: coordinated observations using ishell at the nasa-irtf and keck/nirspec-2 |
on 1 june 2021 eso and a consortium of australian, italian and french institutions signed an agreement for the design and construction of the mcao assisted visible imager and spectrograph (mavis). this very large telescope (vlt) instrument will push the frontier of new astronomical instrument technologies to provide, f... | mavis on the vlt: a powerful, synergistic elt complement in the visible |
motivated by the development of high-dispersion spectrographs in the mid-infrared (mir) range, we study their application to the atmospheric characterization of nearby nontransiting temperate terrestrial planets around m-type stars. we examine the detectability of co2, h2o, n2o, and o3 features in high-resolution plane... | detecting atmospheric molecules of nontransiting temperate terrestrial exoplanets using high-resolution spectroscopy in the mid-infrared domain |
there have been no significant breakthroughs in infrared imagery since the hybridization of iii-v or ii-vi narrow-bandgap semiconductors on complementary metal-oxide semiconductor (cmos) read-out integrated circuits (roics). the development of third-generation, linear-mode avalanche photodiode arrays (lmapds) using mer... | sub-electron noise infrared camera development using leonardo large format 2kx2k swir lmapd array |
we present measurements of the h- and k-band veiling for 141 young stellar objects (ysos) in the taurus-auriga star-forming region using high-resolution spectra from the immersion grating near-infrared spectrometer. in addition to providing measurements of rh and rk, we produce low-resolution spectra of the excess emis... | the igrins yso survey ii: veiling spectra of pre-main-sequence stars in taurus-auriga |
the search for biosignatures on exoplanets connects the fields of biology and biochemistry to astronomical observation, with the hope that we might detect evidence of active biological processes on worlds outside the solar system. here we focus on a complementary aspect of exoplanet characterization connecting astronom... | prebiosignature molecules can be detected in temperate exoplanet atmospheres with jwst |
optically quiescent quasars (oqqs) represent a recently systematized class of infrared-luminous active galactic nuclei (agns) that have galaxy-like optical continua. they may represent an interesting, brief phase in the agn life cycle, e.g., either cocooned within high-covering-factor media or indicative of recent trig... | xmm and nustar observations of an optically quiescent quasar |
we conducted photometric and spectroscopic characterization of near-earth asteroid (52768) 1998 or2 during a close approach to earth in 2020 april. our photometric measurements confirm the rotation period of the asteroid to be 4.126 ± 0.179 hr, consistent with the previously published value of 4.112 ± 0.001 hr. by comb... | physical characterization of near-earth asteroid (52768) 1998 or2: evidence of shock darkening/impact melt |
filling out the dearth of detections between direct imaging and radial velocity surveys will test theories of planet formation and (sub)stellar binarity across the full range of semimajor axes, connecting formation of close- to wide-separation gas giants and substellar companions. direct detection of close-in companion... | nicmos kernel-phase interferometry. i. catalogue of brown dwarfs observed in f110w and f170m |
the powerful, high-energy magnetic activities of young stars play important roles in the magnetohydrodynamics in the innermost parts of the protoplanetary disks. in addition, the associated uv and x-ray emission dictates the photochemistry; moreover, the corona activities can affect the atmosphere of a newborn extrasol... | anisotropic ionizing illumination from an m-type pre-main-sequence star, dm tau |
a novel infrared image destriping method is proposed from a single image. the proposed method can estimate the clean image and stripe noise image simultaneously. firstly, we analyze the common challenges in current destriping algorithms, and then integrate an unidirectional total variation constraint to remove stripe n... | flexible infrared images destriping algorithm with l1-based sparse regularization for wide-field astronomical images |
context. the mid-infrared emission features commonly attributed to polycyclic aromatic hydrocarbons (pahs) vary in profile and peak position. these profile variations form the basis of their classification: classes a, b, c reflect profiles with increasing central wavelength while class d has similar central wavelength ... | the mid-infrared aliphatic bands associated with complex hydrocarbons |
two far-infrared point source catalogues from the akari all-sky survey are presented. the fis bright source catalogue ver.2 was released in april 2016 and publically available from the isas archive. it is the revised version of the initial release in march 2010, and have improvements in number of detections, completene... | akari far-infrared point source catalogues |
in this paper, we present the first measurements of the vertical distribution of cyanogen ( ${{\rm{c}}}_{2}{{\rm{n}}}_{2}$ ) in titan's lower atmosphere at different latitudes and seasons, using cassini's composite infrared spectrometer far-infrared data. we also study the vertical distribution of three other minor spe... | c2n2 vertical profile in titan's stratosphere |
context. a high-quality astronomical observing site, the lenghu site, was recently discovered on the tibetan plateau. the statistical analysis of site quality monitor data collected so far have indicated that the precipitable water vapor (pwv) is lower than 2 mm for 55% of the night. the nighttime temperature is also v... | long-term variations in precipitable water vapor and temperature at lenghu site |
methyl isocyanate has been recently detected in comet 67p/churyumov-gerasimenko (67p/cg) and in the interstellar medium. new physicochemical studies on this species are now necessary as tools for subsequent studies in astrophysics. in this work, infrared spectra of solid ch3nco have been obtained at temperatures of rel... | laboratory study of methyl isocyanate ices under astrophysical conditions |
astronomical detection at infrared wavelengths is crucial in astrophysics due to the critical information in this wavelength range. blocked impurity band (bib) infrared detectors are desirable for space-based astronomical observation due to their broad response range, low dark currents, high quantum efficiencies, and e... | progress and challenges in blocked impurity band infrared detectors for space-based astronomy |
there are more than eight large aperture telescopes (larger than eight meters) equipped with adaptive optics system in the world until now. due to the limitations such as the difficulties of increasing actuator number of deformable mirror, most of them work in the infrared waveband. a novel two-step high-resolution opt... | visible light high-resolution imaging system for large aperture telescope by liquid crystal adaptive optics with phase diversity technique |
we present an analysis of galactic bulge stars from hubble space telescope wide field camera 3 observations of the stanek window (l, b = [0.25, -2.15]) from two epochs approximately two years apart. this data set is adjacent to the provisional wide-field infrared survey telescope (wfirst) microlensing field. proper mot... | comparing observed stellar kinematics and surface densities in a low-latitude bulge field to galactic population synthesis models |
the sample of byurakan-iras galaxies (big) has been created based on optical identifications of iras point source catalog (psc) at high galactic latitudes. as a result, 1178 galaxies have been identified. 172 of them have been observed spectroscopically with byurakan astrophysical observatory (bao, armenia) 2.6 m, spec... | study and classification of sdss spectra for byurakan-iras galaxies |
astronomical instruments greatly improve wavelength multiplexing capabilities by using beam splitters. in the case of the 4-m national science foundation's daniel k. inouye solar telescope (dkist) solar telescope, over 70 w of optical power is distributed simultaneously to four instruments, each with multiple cameras. ... | polarization modeling and predictions for dkist, part 9: flux distribution with fido |
the vvv microlensing search has recently surveyed the region of the galactic plane at b = 0 within -10.00 ≤ l ≤ 10.44 deg. in the near-infrared (ir) discovering hundreds of microlensing events. in this paper we explore the microlensing events with background sources that might be located in the far disk of the galaxy, ... | vvv survey microlensing: candidate events with a source in the far disk |
the study of exoplanets is an exploding field in astronomy. recent discoveries have made possible the development of a new research field, the spectroscopic characterization of the exoplanetary atmospheres, using both primary and eclipse transits. a dedicated space mission will make possible the characterization of man... | transit spectroscopy of exoplanets from space: how to optimize the wavelength coverage and spectral resolving power |
time domain photometric surveys for large numbers of stars have ushered in a new era of statistical studies of astrophysics. this new parameter space allows us to observe how stars behave and change on a human timescale, and facilitates ensemble studies to understand how stars change over cosmic timescales. with curren... | spots and flares: stellar activity in the time domain era |
in this paper we will briefly revisit the optical vibration measurement system (ovms) at the large binocular telescope (lbt) and how these values are used for disturbance compensation and particularly for the lbt interferometer (lbti) and the lbt interferometric camera for near-infrared and visible adaptive interferome... | ovms-plus at the lbt: disturbance compensation simplified |
we developed a new experimental system for infrared (ir) measurements on free-flying nucleating nanoparticles in situ and applied it to studies on silicate particles. we monitored the condensation of magnesium-bearing silicate nanoparticles from thermally evaporated magnesium and silicon monoxide vapor under an atmosph... | in situ infrared measurements of free-flying silicate during condensation in the laboratory |
large-format infrared arrays are enablers for a variety of astronomical applications, from wide-field imaging to very high-resolution spectroscopy over a wide range of wavelength. we present the optimization of the science-grade h4rg array used in the spirou high-resolution spectrograph designed for high-precision velo... | h4rg characterization for high-resolution infrared spectroscopy |
triphenylene (c18h12) is a highly symmetric polycyclic aromatic hydrocarbon (pah) molecule with a 'fully-benzenoid' electronic structure. this confers a high chemical stability compared with pahs of similar size. although numerous infrared and uv-vis experimental spectroscopic and theoretical studies of a wide range pa... | laboratory spectroscopy and astronomical significance of the fully-benzenoid pah triphenylene and its cation |
context. ring-like structures in the interstellar medium (ism) are commonly associated with high-mass stars. kinematic studies of large structures in giant molecular clouds (gmcs) toward these ring-like structures may help us to understand how massive stars form.aims: the origin and properties of the ring-like structur... | g345.45+1.50: an expanding ring-like structure with massive star formation |
the canarias infrared camera experiment (circe) is a near-infrared (1-2.5μm) imager, polarimeter and low-resolution spectrograph operating as a visitor instrument for the gran telescopio canarias (gtc) 10.4-m telescope. it was designed and built largely by graduate students and postdocs, with help from the university o... | circe: the canarias infrared camera experiment for the gran telescopio canarias |
we present new criteria for selecting h ii regions from the infrared astronomical satellite (iras) point source catalogue (psc), based on an h ii region catalogue derived manually from the all-sky wide-field infrared survey explorer (wise). the criteria are used to augment the number of h ii region candidates in the mi... | improved selection criteria for h ii regions, based on iras sources |
terahertz (thz) technology is becoming more eminent for applications in diverse areas including biomedical imaging, communication, security and astronomy. however, thz detection still has some challenges due to the lack of sources and detectors despite decades of considerable effort. the appearance of graphene and its ... | intrinsic photo-conductance triggered by the plasmonic effect in graphene for terahertz detection |
the metal mirror has been widely used in optical application for a longtime. especially the aluminum 6061 is often considered the preferred material for manufacturing optical components for ground-based astronomical applications. one reason for using this material is its high specific stiffness and excellent thermal pr... | investigation of rapidly solidified aluminum by using diamond turning and a magnetorheological finishing process |
photometric correction based on the shkuratov method is applied to derive visible and infrared albedo maps of rhea from disc-resolved cassini vims data. differently from i/f images, albedo maps offer an optimal disentanglement of composition and physical properties of the surface from illumination-viewing effects and t... | photometric modelling and vis-ir albedo maps of rhea from cassini-vims |
disintegrating planets are ultrashort-period exoplanets that appear to have a comet-like dust tail. they are commonly interpreted as low-mass planets whose solid surface is evaporating, and whose tails are made of recondensing minerals. transmission spectroscopy of the dust tails could thus allow us to directly probe t... | constraining the bulk composition of disintegrating exoplanets using combined transmission spectra from jwst and spica |
the herschel extragalactic legacy project (help) focuses to publish an astronomical multiwavelength catalogue of millions of objects over 1300 deg2 of the herschel space observatory survey fields. millions of galaxies with ultraviolet-far infrared photometry make help a perfect sample for testing spectral energy distri... | help project - a dreamed-of multiwavelength dataset for sed fitting: the influence of used models for the main physical properties of galaxies |
in anticipation of future flagship missions focused on the goal of achieving direct imaging of rocky exoplanets, we have developed a database of models to help the community examine the potential spectral characteristics of a broad range of rocky planet atmospheres. using the publicly available planetary spectrum gener... | utilizing a database of simulated geometric albedo spectra for photometric characterization of rocky exoplanet atmospheres |
optical and near-infrared microwave kinetic inductance detectors, or mkids are low-temperature detectors with inherent spectral resolution that are able to instantly register individual photons with potentially no false counts or readout noise. these properties make mkids transformative for exoplanet direct imaging by ... | first principle simulator of a stochastically varying image plane for photon-counting high contrast applications |
we present very large telescope sinfoni near-infrared (nir) integral field spectroscopy of six z ∼ 0.2 lyman break galaxy “analogs” (lbas) from which we detect h i, he i, and [fe ii] recombination lines and multiple h2 rovibrational lines in emission. the paα kinematics reveal high velocity dispersions and low rotation... | the star-forming interstellar medium of lyman break galaxy analogs |
winered is a pi-type 0.9 - 1.35 μm high-resolution spectrograph developed by the laboratory of infrared highresolution spectrograph (lih) of the koyama astronomical observatory at kyoto sangyo university, japan. the scope of winered is to realize a high-resolution near-infrared (nir) spectrograph with both wide coverag... | first high-efficiency and high-resolution (r=80,000) nir spectroscopy with high-blazed echelle grating: winered hires modes |
context. deuterated interstellar molecules frequently have abundances relative to their main isotopologues much higher than the overall elemental d-to-h ratio in the cold dense interstellar medium. h3+ and its isotopologues play a key role in the deuterium fractionation; however, the abundances of these isotopologues h... | search for h3+ isotopologues toward crl 2136 irs 1 |
using the 1.26 m national astronomical observatory-guangzhou university infrared/optical telescope (ngt), we monitor one bl lac object, oj 287. for this source, we obtain 15 094 gri observations (4900 at g band, 5184 at r band and 5010 at i band) in 155 nights from 2014 december 13 to 2019 march 15. based on the upper ... | optical monitoring and intra-day variabilities of bl lac objects oj 287 |
we present here far-infrared photometry of galaxies in a sample that is relatively unexplored at these wavelengths: low-metallicity dwarf galaxies with moderate star formation rates. four dwarf irregular galaxies from the little things survey are considered, with deep herschel pacs and spire observations at 100, 160, 2... | herschel photometric observations of little things dwarf galaxies |
massive, evolved stars play a crucial role in the metal enrichment, dust budget, and energetics of the interstellar medium; however, the details of their evolution are uncertain because of their rarity and short lifetimes before exploding as supernovae. discrepancies between theoretical predictions from single-star evo... | an apparent precessing helical outflow from a massive evolved star: evidence for binary interaction |
we review the potential of astrophotonics, a relatively young field at the interface between photonics and astronomical instrumentation, for spectro-interferometry. we review some fundamental aspects of photonic science that drove the emergence of astrophotonics, and highlight the achievements in observational astrophy... | astronomical photonics in the context of infrared interferometry and high-resolution spectroscopy |
the largest uncertainty on measurements of dark energy using type ia supernovae (sneia) is presently due to systematics from photometry; specifically to the relative uncertainty on photometry as a function of wavelength in the optical spectrum. we show that a precise constraint on relative photometry between the visibl... | a precise photometric ratio via laser excitation of the sodium layer - i. one-photon excitation using 342.78 nm light |
nereid, neptune's third-largest satellite, lies in an irregular orbit and is the only outer satellite in the system (apart from triton) that can be spectroscopically characterized with the current generation of earth-based telescopes. we report our results on the spectral characterization of nereid using its reflectanc... | complex water-ice mixtures on nii nereid: constraints from nir reflectance |
this paper is the second in a pair of papers on the topic of the generation of a two-colour artificial star [which we term a laser photometric ratio star (lprs)] of de-excitation light from neutral sodium atoms in the mesosphere, for use in precision telescopic measurements in astronomy and atmospheric physics, and mor... | a precise photometric ratio via laser excitation of the sodium layer - ii. two-photon excitation using lasers detuned from 589.16 and 819.71 nm resonances |
we present new period-luminosity and period-luminosity-metallicity relations for galactic rr lyrae stars based on a sample of 28 pulsators located at distances of up to 1.5 kpc from the sun. near-infrared photometry was obtained at the cerro armazones observatory, and parallaxes were taken from the gaia early data rele... | new near-infrared period-luminosity-metallicity relations for galactic rr lyrae stars based on gaia edr3 parallaxes |
designing a new astronomical instrument typically challenges the available cameras on the market. in many cases, no camera can fulfill the requirements of the instrument in terms of photon budget, speed, and even interfaces with the rest of the instrument. in this situation, the only options are to either downgrade the... | spgcam: a specifically tailored camera for solar observations |
following the discovery of sage0536agn (z ~ 0.14), with the strongest 10-μm silicate emission ever observed for an active galactic nucleus (agn), we discovered sage0534agn (z ~ 1.01), a similar agn but with less extreme silicate emission. both were originally mistaken as evolved stars in the magellanic clouds. lack of ... | the vmc survey - xlix. discovery of a population of quasars dominated by nuclear dust emission behind the magellanic clouds |
the comparison between astronomical spectra and laboratory experiments is fundamental to spread light on the structure and composition of ices found in interstellar dense molecular clouds and in solar system bodies. water is among the most abundant solid-phase species observed in these environments, and several attempt... | solid deuterated water in space: detection constraints from laboratory experiments |
we present project updates of the next-generation infrared space mission spica (space infrared telescope for cosmology and astrophysics) as of november 2015. spica is optimized for mid- and far-infrared astronomy with unprecedented sensitivity, which will be achieved with a cryogenically cooled (below 8 k), large (2.5~... | the next-generation infrared space mission spica: project updates |
context. ketene was detected in the interstellar medium (ism) in 1977. until now, only one derivative, the ketenyl radical, has been observed in this medium. due to its large dipole moment value, cynaoketene is one of the best candidates for possible ketene derivative detection.aims: to date, the measurements of the ro... | millimeter wave spectroscopy of cyanoketene (nc-ch=c=o) and an observational search in the ism |
this study provides the results of simultaneous multicolor observations for the first visorsat (starlink-1436) and the ordinary starlink satellite (starlink-1113) in the u, b, v, g', r, i, rc, ic, $z$, j, h, and ks bands to quantitatively investigate the extent to which visorsat reduces its reflected light. our results... | multicolor and multi-spot observations of starlink's visorsat |
glass with embedded metal and sulfides (gems), the major components of chondritic-porous interplanetary dust particles (cp-idps), is one of the most primitive materials in the solar system and may be analogous to the amorphous silicate dust observed in various astronomical environments. mineralogical characteristics of... | condensation of cometary silicate dust using an induction thermal plasma system. ii. mg-fe-si-o-s system and the effects of sulfur and redox conditions |
the high-resolution mid-infrared spectrometer instrument will fly onboard the national aeronautics and space administration's airborne stratospheric observatory for infrared astronomy in 2019. it will provide astronomers with a unique observing window (25-122 μ m) for exploring the evolution of protoplanetary disks int... | characterization of si membrane tes bolometer arrays for the hirmes instrument |
the skymap star catalog system consists of a master catalog stellar database and a collection of utility software designed to create and maintain the database and to generate derivative mission star catalogs (run catalogs). it contains an extensive compilation of information on almost 300000 stars brighter than 8.0mag.... | vizier online data catalog: sky2000 master catalog, version 5 (myers+ 2006) |
we describe the results of testing a shortwave infrared cmos camera using an indium gallium arsenide (ingaas) detector. the new generation of ingaas detectors offers a cost-effective alternative to mercury cadmium telluride (hgcdte) for astronomy research, with current, off-the-shelf cameras requiring no modification b... | laboratory and on-sky testing of an ingaas detector for infrared imaging |
the high-resolution mid-infrared spectrometer (hirmes) under development for stratospheric observatory for infrared astronomy is an instrument operating in the 25-122 μm spectral range with a spectral resolution r = δ λ/ λ 100,000 and has two absorber-coupled transition edge sensor bolometric detector focal planes. we ... | a path to high-efficiency optical coupling for hirmes |
we report 4.9 to 27.7 micron grism spectroscopy of the very slow, bright nova v1405 cas (atel #14471, #14472, #14478, #14482, #14530, #14614) obtained on 2021 july 01, 02, and 07 ut with the forcast (herter, t. l., et al. 2012, apj, 749, l18) science instrument on the nasa stratospheric observatory for infrared astrono... | the mid-ir sofia forcast spectrum of nova v1405 cassiopeia |
we have performed detailed dynamical modeling of the structure of a faint dust band observed in coadded infrared astronomical satellite data at an ecliptic latitude of 17° that convincingly demonstrates that it is the result of a relatively recent (significantly less than 1 ma) disruption of an asteroid and is still in... | signatures of recent asteroid disruptions in the formation and evolution of solar system dust bands |
we report high-resolution near-infrared absorption spectroscopy of h2, h3+, and co toward the young high mass object ngc 7538 irs 1. the v = 1-0 h2 s(0) line and lines in the co v = 2-0 band were detected; the v = 1-0 h2 s(1) line and the v = 1-0 h3+ lines [r(1, 1)l, r(1, 0), r(1, 1)u] were not detected. the line of si... | infrared absorption lines toward ngc 7538 irs 1: abundances of h2, h3+, and co |
time-variable absorption by water vapor in earth’s atmosphere presents an important source of systematic error for a wide range of ground-based astronomical measurements, particularly at near-infrared wavelengths. we present results from the first study on the temporal and spatial variability of water vapor absorption ... | temporal variations of telluric water vapor absorption at apache point observatory |
the search for life via characterization of earth-like planets in the habitable zone is one of the key scientific objectives in astronomy. we describe a new phase-occulting (po) interferometric nulling coronagraphy (nc) approach. the po-nc approach employs beamwalk and freeform optical surfaces internal to the interfer... | phase-occultation nulling coronagraphy |
numerous accidental near degeneracies exist between the 2 ν2 and ν4 rotation-vibration energy levels of ammonia. transitions between these two states possess significantly enhanced sensitivity to a possible variation of the proton-to-electron mass ratio μ . using a robust variational approach to determine the mass sens... | enhanced sensitivity to a possible variation of the proton-to-electron mass ratio in ammonia |
the dust-forming nova v2676 oph is unique in that it was the first nova to provide evidence of c2 and cn molecules during its near-maximum phase and evidence of co molecules during its early decline phase. observations of this nova have revealed the slow evolution of its lightcurves and have also shown low isotopic rat... | mid-infrared spectroscopic observations of the dust-forming classical nova v2676 oph |
context. dark nebulae display a surface brightness because dust grains scatter light of the general interstellar radiation field (isrf). high-galactic-latitudes dark nebulae are seen as bright nebulae when surrounded by transparent areas which have less scattered light from the general galactic dust layer.aims: photome... | optical and uv surface brightness of translucent dark nebulae. dust albedo, radiation field, and fluorescence emission by h2 |
the stratospheric observatory for infrared astronomy (sofia) is a 2.5-m telescope mounted inside of a boeing 747sp. planning and executing astronomical observations from an aircraft moving at 500 miles per hour has its own unique challenges and advantages. scheduling and optimizing an entire year of science observation... | using modis weekly evapotranspiration to monitor drought |
carbon chains, especially polyynes, are the building blocks of complex molecules such as polycyclic aromatic hydrocarbons and fullerenes, and polyynes are observed in circumstellar and interstellar (cis) environments. yet these same cis environments show only low levels of gaseous iron despite it being the fourth most ... | on the structure, magnetic properties, and infrared spectra of iron pseudocarbynes in the interstellar medium |
the microlensing event ogle-2011-blg-0417 is an exceptionally bright lens binary that was predicted to present radial velocity variation at the level of several km s-1. pioneer radial velocity follow-up observations with the uves spectrograph at the eso-vlt of this system clearly ruled out the large radial velocity var... | spectroscopic characterisation of microlensing events. towards a new interpretation of ogle-2011-blg-0417 |
context. grs 1758-258 is one of two prototypical microquasars towards the galactic center direction discovered almost a quarter of a century ago. the system remains poorly studied in the optical domain due to its counterpart being a very faint and absorbed target in a crowded region of the sky.aims: our aim is to inves... | optical spectroscopy of the microquasar grs 1758-258: a possible intermediate mass system? |
application of the radial velocity (rv) technique in the near-infrared is valuable because of the diminished impact of stellar activity at longer wavelengths, making it particularly advantageous for the study of late-type stars but also for solar-type objects. in this paper, we present the igrins rv open-source python ... | igrins rv: a precision radial velocity pipeline for igrins using modified forward modeling in the near-infrared |
it has recently been claimed that the nebula, dragonfish, is powered by a superluminous but elusive ob association. however, systematic searches in near-infrared photometric surveys have found many other cluster candidates in this region of the sky. among these, the first confirmed young massive cluster was mercer 30, ... | probing the dragonfish star-forming complex: the ionizing population of the young massive cluster mercer 30 |
the detailed magnetic field structure of the dense core sl 42 (cra-e) in the corona australis molecular cloud complex was investigated based on near-infrared polarimetric observations of background stars to measure dichroically polarized light produced by magnetically aligned dust grains. the magnetic fields in and aro... | distortion of magnetic fields in the dense core sl 42 (cra-e) in the corona australis molecular cloud complex |
measurements of the cosmic far-infrared background (cib) indicate that emission from many extragalactic phenomena, including star formation and black hole accretion, in the universe can be obscured by dust. resolving the cib to study the population of galaxies in which this activity takes place is a major goal of submi... | almacal vii: first interferometric number counts at 650 μm |
context. ultracool dwarfs are objects with spectral types equal to or later than m7. most of them have been discovered using wide-field imaging surveys. the virtual observatory has proven to be very useful for efficiently exploiting these astronomical resources.aims: we aim to validate a virtual observatory methodology... | j-plus: discovery and characterisation of ultracool dwarfs using virtual observatory tools |
interstellar infrared observation shows featured spectrum due to polycyclic aromatic hydrocarbon (pah)at wavelength 3.3,6.2,7.6,7.8,8.6,and 11.3 micrometer,which are ubiquitously observed in many astronomical dust clouds and galaxies. our previous first principles calculation revieled that viod induced coronene (c23h12... | astronomical quantum-chemical origin of ubiquitously observed interstellar infrared spectrum due to polycyclic aromatic hydrocarbon |
this paper presents the result of hα imaging for luminous and ultraluminous infrared galaxies. it is a complete subsample of the great observatories all-sky lirg survey (goals) with decl. ≥ -30°, and consists of 148 galaxies with log(l ir/l ⊙) ≥ 11.0. all the hα images were carried out using the 2.16 m telescope at the... | an hα imaging survey of all (ultra)luminous infrared galaxies at decl. ≥ -30° in the goals sample |
x-ray binaries provide exceptional laboratories for understanding the physics of matter under the most extreme conditions. until recently, there were few, if any, observational constraints on the circumbinary environments of x-ray binaries at ~100-5000 au scales. it remains unclear how the accretion onto the compact ob... | the first high-contrast images of x-ray binaries: detection of candidate companions in the γ cas analog rx j1744.7-2713 |
studies on the circumstellar structures around evolved stars provide vital information on the evolution of the parent star and the properties of the local interstellar medium. in this work, we present the discovery and characterization of an optical cocoon tail behind the star hd 185806. the cocoon apex emission is puz... | discovery of an optical cocoon tail behind the runaway hd 185806 |
the observed large variation in the abundance of deuterium (d) in the interstellar medium suggests that a significant fraction of d may be depleted into polycyclic aromatic hydrocarbons (pahs). signatures of the deuteration of pahs are expected to appear most clearly through the c-d stretching modes at 4.4-4.7 μm, whos... | laboratory measurements of stretching band strengths of deuterated quenched carbonaceous composites |
we present polarization observations of the young supernova remnant (snr) cas a using the high-resolution airborne wideband camera-plus (hawc +) instrument onboard the stratospheric observatory for infrared astronomy (sofia). the polarization map at 154 $\mu$m reveals dust grains with strong polarization fractions (5-3... | far-infrared polarization of the supernova remnant cassiopeia a with sofia hawc + |
the clarity of nights is the major factor that should be carefully considered for optical/infrared astronomical observatories in site-testing campaigns. cloud coverage is directly related to the amount of time available for scientific observations at observatories. in this article, we report on the results of detailed ... | site-testing at the muztagh-ata site v. nighttime cloud amount during the last five years |
room temperature detection of molecular vibrations in the mid-infrared (mir, $\lambda$ =3-30$\mu$m) has numerous applications including real-time gas sensing, chemical reactivity, medical imaging, astronomical surveys, and quantum communication [1,2]. however, mir detection is severely hindered by thermal noise, hence ... | single-molecule mid-ir detection through vibrationally-assisted luminescence |
the space variable astronomical object monitor (svom) is a mission dedicated to the detection and characterization of gamma-ray bursts and other high-energy astrophysical transients. svom is jointly developed by the chinese academy of science (cas), the chinese national space administration (cnsa) and the french space ... | the svom mission. |
high-energy radiation from the sun governs the behavior of earth's upper atmosphere and such radiation from any planet-hosting star can drive the long-term evolution of a planetary atmosphere. however, much of this radiation is unobservable because of absorption by earth's atmosphere and the interstellar medium. this m... | proxy-based prediction of solar extreme ultraviolet emission using deep learning |
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