MK-like spectral classification for hot subdwarf stars with LAMOST spectra

IF 2.2 4区 物理与天体物理 Q2 ASTRONOMY & ASTROPHYSICS
Xuan Zou, Zhenxin Lei
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引用次数: 0

Abstract

An MK-like spectral classification has been conducted for 1224 hot subdwarf stars with LAMOST DR9 low-resolution spectra. The whole sample was divided into four categories according to the spectral line characteristics: He-normal, He-weak, He-strong C, and He-strong. Each selected spectrum was assigned a spectral class, a luminosity class, and a helium class by comparing the line depth and width with standard spectra selected in LAMOST. Relationships between atmospheric parameters and spectral classification are also presented.
利用 LAMOST 光谱对热亚矮星进行类似 MK 的光谱分类
利用 LAMOST DR9 低分辨率光谱对 1224 颗热亚矮星进行了类似 MK 的光谱分类。根据谱线特征,整个样本被分为四类:He-正常、He-弱、He-强C和He-强。通过与 LAMOST 选定的标准光谱比较谱线深度和宽度,为每个选中的光谱分配一个光谱等级、一个光度等级和一个氦等级。此外,还介绍了大气参数与光谱分类之间的关系。
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来源期刊
Publications of the Astronomical Society of Japan
Publications of the Astronomical Society of Japan 地学天文-天文与天体物理
CiteScore
4.10
自引率
13.00%
发文量
98
审稿时长
4-8 weeks
期刊介绍: Publications of the Astronomical Society of Japan (PASJ) publishes the results of original research in all aspects of astronomy, astrophysics, and fields closely related to them.
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