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To separate stars and galaxies in the far infrared AKARI All-Sky Survey data, we have selected a sample with the complete color information available in the low extinction regions of the sky and constructed color-color plots for these data.…

宇宙学与河外天体物理 · 物理学 2015-05-18 Agnieszka Pollo , Piotr Rybka , Tsutomu T. Takeuchi

We present refined color-color selection criteria for identifying Wolf-Rayet (WR) stars using available mid infrared (MIR) photometry from WISE in combination with near infrared (NIR) photometry from 2MASS. Using a sample of spectrally…

太阳与恒星天体物理 · 物理学 2015-06-18 Jacqueline K. Faherty , Michael M. Shara , David Zurek , Graham Kanarek , Anthony F. J. Moffat

We present a sample of 968 K5-M6 dwarfs detected in the AKARI-IRC Point Source Catalog. The vast majority of these low-mass stars have brightnesses in the AKARI broad 9-micron (S9W) filter that match expectations of model photospheres.…

太阳与恒星天体物理 · 物理学 2010-08-27 John E. Gizis

We analyze Spitzer IRS spectra of 110 B-, A-, F-, and G-type stars with optically thin infrared excess in the Scorpius-Centaurus (ScoCen) OB association. The age of these stars ranges from 11-17 Myr. We fit the infrared excesses observed in…

地球与行星天体物理 · 物理学 2015-07-24 Hannah Jang-Condell , Christine H. Chen , Tushar Mittal , P. Manoj , Dan Watson , Carey M. Lisse , Erika Nesvold , Marc Kuchner

We present Spitzer IRAC and MIPS observations for a sample of eight M dwarfs: six dMe, one dM, and one sdMe star. All of our targets are found to have SEDs which are fitted within the error bars by a purely photospheric spectrum out to 24…

天体物理学 · 物理学 2008-11-26 Basmah Riaz , D. J. Mullan , John E. Gizis

We present archival Spitzer IRS spectra of 19 luminous 8 micron selected sources in the Large Magellanic Cloud (LMC). The object classes derived from these spectra and from an additional 24 spectra in the literature are compared with…

太阳与恒星天体物理 · 物理学 2014-11-20 Catherine L. Buchanan , Joel H. Kastner , Bruce J. Hrivnak , Raghvendra Sahai

A millimeter molecular line survey of three carbon-rich AGB stars and two oxygen-rich planetary nebulae has been carried out over the frequency range 80.5-115.5 GHz. Sixty eight different transitions were detected in the data from 27…

太阳与恒星天体物理 · 物理学 2015-09-30 Christina L. Smith , Albert A. Zijlstra , Gary A. Fuller

In a shallow near-infrared survey of the dwarf Irregular galaxy, NGC 3109, near the periphery of the Local Group, we have found eight Mira variables, seven of which appear to be oxygen-rich (O-Miras). The periods range from about 430 days…

太阳与恒星天体物理 · 物理学 2018-12-26 J. W. Menzies , P. A. Whitelock , M. W. Feast , N. Matsunaga

Carbon stars are excellent kinematic tracers of galaxies and play important roles in understanding the evolution of the Galaxy. Therefore, it is worthwhile to search for them in a large amount of spectra. In this work, we build a new carbon…

星系天体物理 · 物理学 2023-12-12 Linlin Li , Kecheng Zhang , Wenyuan Cui , Jianrong Shi , Wei Ji , Zhenyan Huo , Yawei Gao , Shuai Zhang , Mingxu Sun

New multi-epoch, mid-infrared (8-13 microns) spectrophotometric observations are presented for 30~late-type stars. The observations were collected over a four year period (1994-1997), permitting an investigation of the mid-infrared spectral…

天体物理学 · 物理学 2009-10-30 J. D. Monnier , T. R. Geballe , W. C. Danchi

Infrared excess is an important probe of sub-stellar companions and/or debris disks around white dwarfs (WDs). Such systems are still rare for in-depth understanding of their formation and long-term evolution. One of the largest…

太阳与恒星天体物理 · 物理学 2023-02-15 Lin Wang , Xiaoxia Zhang , Junfeng Wang , Zhi-Xiang Zhang , Taotao Fang , Wei-Min Gu , Jincheng Guo , Xiaochuan Jiang

We have compiled a large sample of 151 high redshift (z=0.5-4) galaxies selected at 24 microns (S24>100 uJy) in the GOODS-N and ECDFS fields for which we have deep Spitzer IRS spectroscopy, allowing us to decompose the mid-infrared spectrum…

The Wide-field Infrared Survey Explorer (WISE) has completed its all-sky survey at 3.4-22 micron. We merge the WISE data with optical SDSS data and provide a phenomenological characterization of mid-IR, extragalactic sources. WISE is most…

宇宙学与河外天体物理 · 物理学 2015-06-11 Lin Yan , E. Donoso , C. -W. Tsai , D. Stern , R. J. Assef , P. Eisenhardt , A. W. Blain , R. Cutri , T. Jarrett , S. A. Stanford , E. Wright , C. Bridge , D. A. Riechers

Cross-identifications for 14,574 intrinsically luminous galactic stars (mostly OB stars) to objects in the 2MASS survey have been determined using a search box of +/-0.0015 degrees (+/- 5.4 arcsec) in both RA and Dec. Instructions on…

天体物理学 · 物理学 2007-05-23 B. Cameron Reed

Mass-loss from evolved stars chemically enriches the ISM. Stellar winds from massive stars and their explosions as SNs shape the ISM and trigger star formation. Studying evolved stars is fundamental for understanding galaxy formation and…

星系天体物理 · 物理学 2015-06-03 Maria Messineo , Karl M. Menten , Edward Churchwell , Harm Habing

We present an all-sky sample of 984 candidate intermediate-mass Galactic star-forming regions color-selected from the Infrared Astronomical Satellite (IRAS) Point Source Catalog and morphologically classify each object using mid-infrared…

We present the first rates of flares from M dwarf stars in both red optical and near infrared (NIR) filters. We have studied ~50,000 M dwarfs from the SDSS Stripe 82 area, and 1,321 M dwarfs from the 2MASS Calibration Scan Point Source…

We have identified 17 A-type stars in the Galactic Plane that have mid-IR excesses at 8 micron. From the observed colors in the (r'-H_alpha)-(r'-i') plane, we first identified 23050 early A-type main sequence (MS) star candidates in the…

To ascertain the nature of the brightest compact mid-infrared sources in the Large Magellanic Cloud (LMC), we have applied an updated version of the Buchanan et al. (2006) 2MASS-MSX color classification system, which is based on the results…

We present an 86 GHz SiO (v = 1, J = 2 ---> 1) maser search toward late-type stars located within |b|<0.5 deg and 20 deg < l < 50 deg. This search is an extension at longer longitudes of a previously published work. We selected 135 stars…

星系天体物理 · 物理学 2018-11-07 M. Messineo , H. J. Habing , L. O. Sjouwerman , A. Omont , K. M. Menten