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CARBON STARS FROM LAMOST DR2 DATA
Ji,Wei1,2; Cui,Wenyuan1,3; Liu,Chao2; Luo,Ali2; Zhao,Gang2; Zhang,Bo1
2016-08-31
Source PublicationThe Astrophysical Journal Supplement Series
ISSN0067-0049
Volume226Issue:1
AbstractABSTRACT In this work, we present the new catalog of carbon stars from the LAMOST DR2 catalog. In total, 894 carbon stars are identified from multiple line indices measured from the stellar spectra. We are able to identify the carbon stars by combining the CN bands in the red end with C2 and other lines. Moreover, we also classify the carbon stars into spectral sub-types of C–H, C–R, and C–N. These sub-types show distinct features in the multi-dimensional line indices, implying that in the future they can be used to identify carbon stars from larger spectroscopic data sets. While the C–N stars are clearly separated from the others in the line index space, we find no clear separation between the C–R and C–H sub-types. The C–R and C–H stars seem to smoothly transition from one to another. This may hint that the C–R and C–H stars may not be different in their origins, instead their spectra look different because of different metallicities. Due to the relatively low spectral resolution and lower signal-to-noise ratio, the ratio of 12C/13C is not measured and thus the C–J stars are not identified.
Keywordcatalogs stars: carbon stars: statistics surveys
DOI10.3847/0067-0049/226/1/1
Language英语
WOS IDIOP:0067-0049-226-1-1
PublisherThe American Astronomical Society
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Document Type期刊论文
Identifierhttp://ir.bao.ac.cn/handle/114a11/36356
Collection中国科学院国家天文台
Affiliation1.Department of Physics, Hebei Normal University, Shijiazhuang 050024, China; wenyuancui@126.com
2.Key Lab of Astronomy, National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, China; liuchao@bao.ac.cn
3.School of Space Science and Physics, Shandong University at Weihai, Weihai 264209, China
First Author AffilicationNational Astronomical Observatories, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Ji,Wei,Cui,Wenyuan,Liu,Chao,et al. CARBON STARS FROM LAMOST DR2 DATA[J]. The Astrophysical Journal Supplement Series,2016,226(1).
APA Ji,Wei,Cui,Wenyuan,Liu,Chao,Luo,Ali,Zhao,Gang,&Zhang,Bo.(2016).CARBON STARS FROM LAMOST DR2 DATA.The Astrophysical Journal Supplement Series,226(1).
MLA Ji,Wei,et al."CARBON STARS FROM LAMOST DR2 DATA".The Astrophysical Journal Supplement Series 226.1(2016).
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