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首页> 外文期刊>The Astrophysical Journal. Supplement Series >Value-added Catalogs of M-type Stars in LAMOST DR5
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Value-added Catalogs of M-type Stars in LAMOST DR5

机译：Lamost DR5中的M型星的增值目录

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摘要

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 M-G versus (G(bp) - G(rp) )(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.
机译：我们从大型天空区域多对象光纤光谱望远镜（拉莫斯蒂）数据版本5（DR5）上呈现新的M巨头和M矮星的新目录。总共有39,796米巨头和501,152米矮人的分类管道。模板拟合结果包含来自M0至M6的7个温度亚型的M巨型，其中18个温度亚型，来自K7.0至M8.5的18个温度亚型，以及从DMR到USDMP的12个金属性子类。我们将我们的M型目录与两个微米全天调查（2Mass）和广域红外测量探险家（WISE）目录交叉，以获得红外幅度和颜色。采用从盖亚DR2中的视差衍生的距离，Mg与mg（g（bp） - g（rp））（0）图表明我们的m-中还包含早期典型的恒星和白色dwarf-m矮小二进制文件型恒星样品，污染率为M巨头的污染率约为4.6％，为M矮种的0.48％。我们发现CAH光谱指数是碳恒星的有效选择标准。从M巨型样品中鉴定了总共289个碳恒星，并通过液压骨压谱进一步证实。

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