利用 LAMOST 光谱对热亚矮星进行类似 MK 的光谱分类

IF 2.2 4区物理与天体物理 Q2 ASTRONOMY & ASTROPHYSICS

Publications of the Astronomical Society of Japan Pub Date : 2024-08-14 DOI:10.1093/pasj/psae072

Xuan Zou, Zhenxin Lei

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引用次数: 0

摘要

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

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.

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来源期刊

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

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.