Value-added Catalogs of M-type Stars in LAMOST DR5

Value-added Catalogs of M-type Stars in LAMOST DR5
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LAMOST DR5中M型星的增值目录

DOI:
10.3847/1538-4365/ab3859
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发表时间:
2019-08
期刊:
Astrophysical Journal, The - Supplement Series
影响因子:
--
通讯作者:
Hou Jinliang
Hou Jinliang
中科院分区:
其他
文献类型:
--
作者:
Zhong Jing;Li Jing;Carlin Jeffrey L;Chen Li;Mendez Rene A;Hou Jinliang

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我们展示来自大天区多目标光纤光谱望远镜 (LAMOST) 数据版本 5 (DR5) 的 M 巨星和 M 矮星的新目录。分类管道中总共识别出 39,796 M 巨星和 501,152 M 矮星。模板拟合结果包含具有从M0到M6的7个温度亚型的M巨星、具有从K7.0到M8.5的18个温度亚型的M矮星以及从dMr到usdMp的12个金属丰度亚类。我们将 M 型星表与两微米全天巡天 (2MASS) 和广域红外巡天探测器 (WISE) 星表进行交叉匹配,以获得红外星等和颜色。采用Gaia DR2视差推导的距离,MG与(Gbp − Grp)0图显示,我们的M型恒星样本中还包含早期型恒星和白矮星-M型矮双星,M型巨星的污染率约为4.6%,M型矮星的污染率约为0.48%。我们发现 CaH 光谱指数是碳星的有效选择标准。从M巨星样本中总共鉴定出了289颗碳星,并通过LAMOST光谱进一步证实。
We present new catalogs of M giant and M dwarf stars from the Large Sky Area Multi-Object Fibre Spectroscopic Telescope (LAMOST) data release 5 (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 temperature subtypes from M0 to M6, M dwarfs with 18 temperature subtypes from K7.0 to M8.5, and 12 metallicity subclasses from dMr to usdMp. We cross-matched our M-type catalog with the Two Micron All-Sky Survey (2MASS) and Wide-field Infrared Survey Explorer (WISE) catalog to obtain infrared magnitude and colors. Adopting the distances derived from the parallaxes in Gaia DR2, the MG versus (Gbp − Grp)0 diagram shows that there are also early-type stars and white dwarf–M dwarf binaries included in our M-type stars sample, with a contamination rate of about 4.6% for M giants and 0.48% for M dwarfs. We found that CaH spectral indices are an efficient selection criteria for carbon stars. A total of 289 carbon stars were identified from the M giants sample, and further confirmed by LAMOST spectra.
使用分类模板拟合自动识别最新调试数据中的 2612 个 LATE-K 和 M 矮星
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