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Stellar fluxes from the 2MASS catalog are used to remove the contribution due to Galactic stars from the intensity measured by DIRBE in 13 regions in the North and South Galactic polar caps. Allowing for a constant calibration factor…

天体物理学 · 物理学 2007-05-23 Edward L. Wright , Benjamin D. Johnson

The Infrared Astronomical Satellite (IRAS) had a tremendous impact on many areas of modern astrophysics. In particular it revealed the ubiquity of infrared cirrus that are a spectacular manifestation of the interstellar medium complexity…

天体物理学 · 物理学 2008-12-18 Marc-Antoine Miville-Deschenes , Guilaine Lagache

Unbiased analysis shows that IRAS data reliably differentiate between the early and late stages of stellar evolution because objects at these stages clearly segregate in infrared color-color diagrams. Structure in these diagrams is…

天体物理学 · 物理学 2009-10-31 Zeljko Ivezic , Moshe Elitzur

Diffuse interstellar bands comprise hundreds of absorption features in the ISM. Most DIBs are observed in the optical, but some are in the IR. We observed 76 early-type stars at R=50,000 and S/N ratios of several hundreds using CRIRES. We…

Utilizing the Two Micron All Sky Survey (2MASS) Second Incremental Data Release Catalog, we have retrieved near-IR magnitudes for several hundred hot subdwarfs (sdO and sdB stars) drawn from the "Catalogue of Spectroscopically Identified…

天体物理学 · 物理学 2009-11-07 M. A. Stark , Richard A. Wade

We present MSX two-color diagrams that can be used to characterize circumstellar environments of sources with good quality MSX colors in terms of IRAS color regions for oxygen-rich stars. With these diagrams we aim to provide a new tool…

星系天体物理 · 物理学 2014-11-20 Lorant O. Sjouwerman , Stephanie M. Capen , Mark J. Claussen

We present a library of 139 near-IR spectra of cool asymptotic giant branch stars that will be useful for comparison with theoretical model atmosphere calculations and for modeling the integrated emission from intermediate-age stellar…

太阳与恒星天体物理 · 物理学 2015-05-14 N. J. Wright , M. J. Barlow , R. Greimel , J. E. Drew , M. Matsuura , Y. C. Unruh , A. A. Zijlstra

We have produced an atlas of Spitzer Infrared Spectrograph (IRS) spectra of mass-losing, evolved stars in the Large Magellanic Cloud. These stars were selected to have high mass-loss rates and so contribute significantly to the return of…

We present the mid-infrared (MIR) spectra obtained with the Spitzer InfraRed Spectrograph (IRS) for a sample of 52 sources, selected as infrared luminous, z>1 candidates in the Extragalactic First Look Survey (XFLS). The sample selection…

天体物理学 · 物理学 2009-11-11 Lin Yan , Anna Sajina , Dario Fadda , Phil Choi , Lee Armus , George Helou , Harry Teplitz , David Frayer , Jason Surace

An analysis of low resolution spectra and infared data of 29 ISOGAL-DENIS sources with mid-IR excess is presented. Eight ISOGAL sources from our sample with 7-15 micron excess are found to be B and A-type stars, some of them with emission…

天体物理学 · 物理学 2009-11-07 M. Schultheis , M. Parthasarathy , A. Omont , M. Cohen , S. Ganesh , F. Sevre , G. Simon

Recent ground-based mid-infrared spectra of 29 late-type stars, most with substantial dust shells, are compared to ground-based spectra of these stars from the 1960s and 1970s and to IRAS-LRS spectra obtained in 1983. The spectra of about…

天体物理学 · 物理学 2009-10-31 J. D. Monnier , T. R. Geballe , W. C. Danchi

We analyze the differences in infrared circumstellar dust emission between oxygen rich Mira and non-Mira stars, and find that they are statistically significant. In particular, we find that these stars segregate in the K-[12] vs. [12]-[25]…

天体物理学 · 物理学 2009-11-06 M. Marengo , Z. Ivezic , G. R. Knapp

Stellar fluxes from the 2MASS catalog are used to remove the contribution due to Galactic stars from the intensity measured by DIRBE in four regions in the North and South Galactic polar caps. After subtracting the interplanetary and…

天体物理学 · 物理学 2009-10-31 E. L. Wright

A survey of CO(3-2) emission from optically visible oxygen-rich Mira variable stars within 500 pc of the sun was conducted. A molecular envelope was detected surrounding 36 of the 66 stars examined. Some of these stars have lower outflow…

天体物理学 · 物理学 2009-10-28 K. Young

Stars of all evolutionary phases have been found to have excess infrared emission due to the presence of circumstellar material. To identify such stars, we have positionally correlated the infrared MSX point source catalogue and the Tycho 2…

天体物理学 · 物理学 2008-11-26 A. J. Clarke , R. D. Oudmaijer , S. L Lumsden

In this work, we present new catalogs of M giant and M dwarf stars from the LAMOST DR5. In total, 39,796 M giants and 501,152 M dwarfs are identified from the classification pipeline. The template-fitting results contain M giants with 7…

星系天体物理 · 物理学 2019-09-25 Jing Zhong , Jing Li , Jeffrey L. Carlin , Li Chen , Rene A. Mendez , Jinliang Hou

We present a comprehensive survey of diffuse interstellar bands (DIBs) in $0.91-1.32\mu$m with a newly-developed near-infrared (NIR) spectrograph, WINERED, mounted on the Araki 1.3 m Telescope in Japan. We obtained high-resolution…

We review the available near- and mid-infrared photometry for white dwarfs obtained from the Two Micron All-Sky Survey (2MASS) and by the Spitzer Space Telescope. Both data sets have recently been used to seek white dwarfs with infrared…

天体物理学 · 物理学 2008-11-26 P. -E. Tremblay , P. Bergeron

R Coronae Borealis stars (RCBs) are hydrogen-deficient and carbon-rich supergiant stars. They are very rare, as only $\sim50$ are actually known in our Galaxy. Interestingly, RCBs are strongly suspected to be the evolved merger product of…

太阳与恒星天体物理 · 物理学 2015-06-03 Patrick Tisserand

Infrared (IR) excess emission around white dwarfs (WDs) is commonly attributed to circumstellar debris disks and/or low-mass companions, providing a unique window into the evolution of planetary systems and binary evolution after the…

太阳与恒星天体物理 · 物理学 2026-04-14 Ke-Yi Wang , Qiong Liu