The Value-added Catalog of OB Stars in LAMOST DR7

被引：0
|
作者：
Liu, Zhicun [1 ,2 ,3 ,5 ]
Cui, Wenyuan [1 ,2 ]
Gu, Jiajia [1 ]
Shi, Jianrong [4 ]
Hu, Guozhen [1 ,2 ,3 ,5 ]
Wang, Xiao-Long [1 ,2 ,3 ,5 ]
Huo, Zhenyan [1 ,2 ]
机构：
[1] Hebei Normal Univ, Dept Phys, Shijiazhuang 050024, Peoples R China
[2] Hebei Normal Univ, Guo Shoujing Inst Astron, Shijiazhuang 050024, Peoples R China
[3] Hebei Key Lab Photophys Res & Applicat, Shijiazhuang 050024, Peoples R China
[4] Chinese Acad Sci, CAS Key Lab Opt Astron, Natl Astron Observ, Beijing 100101, Peoples R China
[5] Hebei Normal Univ, Phys Postdoctoral Res Stn, Shijiazhuang, Peoples R China
来源：
ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES | 2024年 / 275卷 / 02期
基金：
中国国家自然科学基金;
关键词：
VLT-FLAMES SURVEY; B-TYPE STARS; LARGE-MAGELLANIC-CLOUD; M-CIRCLE-DOT; MASSIVE STARS; SPECTRAL CLASSIFICATION; RUNAWAY STARS; ROTATIONAL VELOCITIES; EVOLUTIONARY STATUS; GALACTIC PLANE;
D O I：
10.3847/1538-4365/ad833f
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
In this work, we update the catalog of OB stars based on the Large Sky Area Multi-Object Fiber Spectroscopic Telescope data release 7 and modify the OB stars' selection criteria in spectral line indices' space. The new catalog includes 37,778 spectra of 27,643 OB stars, of which 3827 OB stars are newly identified. The spectral subclasses of 27,643 OB stars are obtained using the automatic classification code MKCLASS. We find that the modified OB star selection criteria can better improve the completeness of late B-type stars by analyzing their spectral classification results given by MKCLASS. We also identify 3006 Be-type stars or candidates by examining the Balmer lines in their spectra and find that the frequency of our Be-type stars (10.9%) is consistent with previous results. The spatial distribution of OB stars indicates that they are mainly located in the Galactic disk. This new catalog of OB stars will provide valuable data for studying the structure and evolution of the Milky Way.
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页数：10
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