中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
Magnetic activity based on LAMOST medium-resolution spectra and the Kepler survey

文献类型:期刊论文

作者Zhang, Li-yun1,2; Long, Liu1; Shi, Jianrong3; Lu, Hong-peng1; Gao, Qi3; Han, Xianming L.1,4; Wang, Haifeng5,6; Prabhakar, Misra7
刊名MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
出版日期2020-06-01
卷号495期号:1页码:1252-1270
ISSN号0035-8711
关键词stars: activity stars: chromospheres stars: flare stars: rotation
DOI10.1093/mnras/staa942
文献子类Article
英文摘要

Stellar magnetic activity is an interesting phenomenon in late-type stars. We use the medium-resolution spectroscopic observations of 406 069 late-type stars from LAMOST to explore their properties. We perform a statistical analysis on the magnetic activity of the stars and their associated physical parameters. Our samples are cross-matched with other data bases (LAMOST DR5, VSX, and SDSS DR12) to obtain additional observational properties. The equivalent widths (EWs) of H alpha lines, an indicator of chromospheric activity, are calculated. According to the EWs of the H alpha line, we detect 8816 spectra with apparent H alpha emission for a total of 2115 stars among the 2 108 565 spectra analysed. Furthermore, 1521 of these stars show variability in their H alpha lines. In addition, we detect 2132 flare events associated with 41 542 stars from the catalogue by cross-matching our LAMOST medium-resolution samples and the Kepler and K2 data bases. We also confirm a weak relationship of the flare amplitude with increasing Rossby number. There is a clear decease in the strength of chromospheric activity (L-H alpha/L-bol) with increasing rotation period. Moreover, the ratio of the flare energy and stellar luminosity is found to decrease with the stellar mass.

学科主题天文学 ; 天体物理学 ; 实测天体物理学 ; 恒星与银河系 ; 恒星天文学
URL标识查看原文
出版地GREAT CLARENDON ST, OXFORD OX2 6DP, ENGLAND
WOS关键词DIGITAL SKY SURVEY ; VELOCITY EXPERIMENT RAVE ; H-ALPHA-EMISSION ; DATA RELEASE ; COOL STARS ; CHROMOSPHERIC ACTIVITY ; STELLAR ACTIVITY ; VARIABILITY ; SIMULATIONS ; SUPERFLARES
资助项目Joint Fund of Astronomy of the NSFC[11963002] ; Joint Fund of Astronomy of the NSFC[U1631236] ; Joint Fund of Astronomy of the NSFC[U1431114] ; CAS[11963002] ; CAS[U1631236] ; CAS[U1431114] ; LAMOST Fellow project, National Key Basic Research Program of China[SQ2019YFA040021] ; China Postdoctoral Science Foundation[2019M653504] ; Yunnan province Postdoctoral Directed Culture Foundation ; Cultivation Project for LAMOST Scientific Payoff and Research Achievement of CAMS-CAS ; National Development and Reform Commission
WOS研究方向Astronomy & Astrophysics
语种英语
出版者OXFORD UNIV PRESS
WOS记录号WOS:000539101400093
资助机构Joint Fund of Astronomy of the NSFC[11963002, U1631236, U1431114] ; CAS[11963002, U1631236, U1431114] ; LAMOST Fellow project, National Key Basic Research Program of China[SQ2019YFA040021] ; China Postdoctoral Science Foundation[2019M653504] ; Yunnan province Postdoctoral Directed Culture Foundation ; Cultivation Project for LAMOST Scientific Payoff and Research Achievement of CAMS-CAS ; National Development and Reform Commission
源URL[http://ir.ynao.ac.cn/handle/114a53/23396]  
专题云南天文台_中国科学院天体结构与演化重点实验室
通讯作者Zhang, Li-yun
作者单位1.College of Physics, Guizhou University, Guiyang 550025, China
2.Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, Kunming 650011, China
3.National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, China
4.Department of Physics and Astronomy and SARA, Butler University, Indianapolis, IN 46208, USA
5.South-Western Institute for Astronomy Research, Yunnan University, Kunming, 650500, China
6.Department of Astronomy, China West Normal University, Nanchong 637009, China
7.Department of Physics and Astronomy, Howard University, Washington, DC 20059, USA
推荐引用方式
GB/T 7714
Zhang, Li-yun,Long, Liu,Shi, Jianrong,et al. Magnetic activity based on LAMOST medium-resolution spectra and the Kepler survey[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2020,495(1):1252-1270.
APA Zhang, Li-yun.,Long, Liu.,Shi, Jianrong.,Lu, Hong-peng.,Gao, Qi.,...&Prabhakar, Misra.(2020).Magnetic activity based on LAMOST medium-resolution spectra and the Kepler survey.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,495(1),1252-1270.
MLA Zhang, Li-yun,et al."Magnetic activity based on LAMOST medium-resolution spectra and the Kepler survey".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 495.1(2020):1252-1270.

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来源:云南天文台

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