NAOC Open IR
Classification study of WISE infrared sources: identification of candidate asymptotic giant branch stars
Tu Xun1; Wang ZhongXiang1
2013
Source PublicationRESEARCH IN ASTRONOMY AND ASTROPHYSICS
ISSN1674-4527
Volume13Issue:3Pages:323
AbstractIn the Wide-field Infrared Survey Explorer (WISE) all-sky source catalog there are 76 million mid-infrared point sources that were detected in the first three WISE bands and have association with only one 2MASS near-IR source within 3 ''. We search for their identifications in the SIMBAD database and find 3.2 million identified sources. Based on these known sources, we establish three criteria for selecting candidate asymptotic giant branch (AGB) stars in the Galaxy, which are three defined zones in a color-color diagram, Galactic latitude broken vertical bar b| <= 20 degrees, and "corrected" WISE third- bandW3 (c)<= 11. Applying these criteria to theWISE+ 2MASS sources, 1.37 million of them are selected. We analyze the WISE third- bandW3 distribution of the selected sources, and further establish that W3 <= 8 is required in order to exclude a large fraction of normal stars from them. We therefore find 0.47 million candidate AGB stars in our Galaxy from the WISE source catalog. Using W3(c), we estimate their distances and derive their Galactic distributions. The candidates are generally distributed around the Galactic center uniformly, with 68% (1-sigma) of them within approximately 8 kpc. We discuss the idea that optical spectroscopy can be used to verify the C- rich AGB stars in our candidates, and thus a fraction of them (similar to 10%) will be good targets for the Large Sky Area Multi-Object Fiber Spectroscopic Telescope ( LAMOST) survey that is planned to start in fall of 2012.
KeywordLARGE-MAGELLANIC-CLOUD SHORT-WAVELENGTH SPECTROMETER ALL-SKY SURVEY AGB STARS MICRON SPECTRA CARBON STARS DUST EVOLUTION DISTRIBUTIONS EXTINCTION stars: AGB and post-AGB infrared: stars stars: carbon
Language英语
Funding Project[Pre-phase Studies of Space Science Projects of the Chinese Academy of Sciences] ; [National Basic Research Program of China ( 973 Project)] ; [National Natural Science Foundation of China] ; [National Aeronautics and Space Administration]
Document Type期刊论文
Identifierhttp://ir.bao.ac.cn/handle/114a11/60538
Collection中国科学院国家天文台
Affiliation1.中国科学院上海天文台
2.中国科学院国家天文台
3.中国科学院
Recommended Citation
GB/T 7714
Tu Xun,Wang ZhongXiang. Classification study of WISE infrared sources: identification of candidate asymptotic giant branch stars[J]. RESEARCH IN ASTRONOMY AND ASTROPHYSICS,2013,13(3):323.
APA Tu Xun,&Wang ZhongXiang.(2013).Classification study of WISE infrared sources: identification of candidate asymptotic giant branch stars.RESEARCH IN ASTRONOMY AND ASTROPHYSICS,13(3),323.
MLA Tu Xun,et al."Classification study of WISE infrared sources: identification of candidate asymptotic giant branch stars".RESEARCH IN ASTRONOMY AND ASTROPHYSICS 13.3(2013):323.
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