Chromospheric activity properties and search for subdwarfs and extreme subdwarfs based on LAMOST stellar spectral survey
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- 作者：Liyun Zhang ; a ; b ; liy_zhang@hotmail.com" class="auth_mail" title="E-mail the corresponding author ; Qingfeng Pia ; b ; Xianming L. Hana ; c ; Jianrong Shid ; Daimei Wanga ; b ; Ali Luod ; Yong Zhange ; Yonghui Houe ; Yuefei Wange
- 关键词：Stars ; late-type ; Stars ; chromosphere ; Stars ; LAMOST ; Stars ; subdwarf
- 刊名：New Astronomy
- 出版年：2016
- 出版时间：April 2016
- 年：2016
- 卷：44
- 期：Complete
- 页码：66-77
- 全文大小：6534 K
文摘
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We detected 6391 active M stars from 99741 M catalogue of LAMOST survey.
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We obtained the relationship between the fraction of active stars and spectral types.
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We found 1288 subdwarfs (120 active subdwarfs) and 15 extreme subdwarfs (2 active).
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163 stars show variability on long timescales and 34 stars vary on short timescales.