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 |
DOI | 10.1093/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. |
入库方式: OAI收割
来源:云南天文台
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