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Magnetic activity based on LAMOST medium-resolution spectra and the Kepler survey
Zhang, Li-yun1,2; Long, Liu1; Shi, Jianrong3; Lu, Hong-peng1; Gao, Qi3; Han, Xianming L.1,4,5; Wang, Haifeng6,7; Prabhakar, Misra8
2020-06-01
Source PublicationMONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
ISSN0035-8711
Volume495Issue:1Pages:1252-1270
AbstractStellar 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.
Keywordstars: activity stars: chromospheres stars: flare stars: rotation
Funding OrganizationJoint Fund of Astronomy of the NSFC ; Joint Fund of Astronomy of the NSFC ; CAS ; CAS ; LAMOST Fellow project, National Key Basic Research Program of China ; LAMOST Fellow project, National Key Basic Research Program of China ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; Yunnan province Postdoctoral Directed Culture Foundation ; Yunnan province Postdoctoral Directed Culture Foundation ; Cultivation Project for LAMOST Scientific Payoff and Research Achievement of CAMS-CAS ; Cultivation Project for LAMOST Scientific Payoff and Research Achievement of CAMS-CAS ; National Development and Reform Commission ; National Development and Reform Commission ; Joint Fund of Astronomy of the NSFC ; Joint Fund of Astronomy of the NSFC ; CAS ; CAS ; LAMOST Fellow project, National Key Basic Research Program of China ; LAMOST Fellow project, National Key Basic Research Program of China ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; Yunnan province Postdoctoral Directed Culture Foundation ; Yunnan province Postdoctoral Directed Culture Foundation ; Cultivation Project for LAMOST Scientific Payoff and Research Achievement of CAMS-CAS ; Cultivation Project for LAMOST Scientific Payoff and Research Achievement of CAMS-CAS ; National Development and Reform Commission ; National Development and Reform Commission ; Joint Fund of Astronomy of the NSFC ; Joint Fund of Astronomy of the NSFC ; CAS ; CAS ; LAMOST Fellow project, National Key Basic Research Program of China ; LAMOST Fellow project, National Key Basic Research Program of China ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; Yunnan province Postdoctoral Directed Culture Foundation ; Yunnan province Postdoctoral Directed Culture Foundation ; Cultivation Project for LAMOST Scientific Payoff and Research Achievement of CAMS-CAS ; Cultivation Project for LAMOST Scientific Payoff and Research Achievement of CAMS-CAS ; National Development and Reform Commission ; National Development and Reform Commission ; Joint Fund of Astronomy of the NSFC ; Joint Fund of Astronomy of the NSFC ; CAS ; CAS ; LAMOST Fellow project, National Key Basic Research Program of China ; LAMOST Fellow project, National Key Basic Research Program of China ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; Yunnan province Postdoctoral Directed Culture Foundation ; Yunnan province Postdoctoral Directed Culture Foundation ; Cultivation Project for LAMOST Scientific Payoff and Research Achievement of CAMS-CAS ; Cultivation Project for LAMOST Scientific Payoff and Research Achievement of CAMS-CAS ; National Development and Reform Commission ; National Development and Reform Commission
DOI10.1093/mnras/staa942
WOS KeywordDIGITAL SKY SURVEY ; VELOCITY EXPERIMENT RAVE ; H-ALPHA-EMISSION ; DATA RELEASE ; COOL STARS ; CHROMOSPHERIC ACTIVITY ; STELLAR ACTIVITY ; VARIABILITY ; SIMULATIONS ; SUPERFLARES
Language英语
Funding ProjectJoint 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
Funding OrganizationJoint Fund of Astronomy of the NSFC ; Joint Fund of Astronomy of the NSFC ; CAS ; CAS ; LAMOST Fellow project, National Key Basic Research Program of China ; LAMOST Fellow project, National Key Basic Research Program of China ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; Yunnan province Postdoctoral Directed Culture Foundation ; Yunnan province Postdoctoral Directed Culture Foundation ; Cultivation Project for LAMOST Scientific Payoff and Research Achievement of CAMS-CAS ; Cultivation Project for LAMOST Scientific Payoff and Research Achievement of CAMS-CAS ; National Development and Reform Commission ; National Development and Reform Commission ; Joint Fund of Astronomy of the NSFC ; Joint Fund of Astronomy of the NSFC ; CAS ; CAS ; LAMOST Fellow project, National Key Basic Research Program of China ; LAMOST Fellow project, National Key Basic Research Program of China ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; Yunnan province Postdoctoral Directed Culture Foundation ; Yunnan province Postdoctoral Directed Culture Foundation ; Cultivation Project for LAMOST Scientific Payoff and Research Achievement of CAMS-CAS ; Cultivation Project for LAMOST Scientific Payoff and Research Achievement of CAMS-CAS ; National Development and Reform Commission ; National Development and Reform Commission ; Joint Fund of Astronomy of the NSFC ; Joint Fund of Astronomy of the NSFC ; CAS ; CAS ; LAMOST Fellow project, National Key Basic Research Program of China ; LAMOST Fellow project, National Key Basic Research Program of China ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; Yunnan province Postdoctoral Directed Culture Foundation ; Yunnan province Postdoctoral Directed Culture Foundation ; Cultivation Project for LAMOST Scientific Payoff and Research Achievement of CAMS-CAS ; Cultivation Project for LAMOST Scientific Payoff and Research Achievement of CAMS-CAS ; National Development and Reform Commission ; National Development and Reform Commission ; Joint Fund of Astronomy of the NSFC ; Joint Fund of Astronomy of the NSFC ; CAS ; CAS ; LAMOST Fellow project, National Key Basic Research Program of China ; LAMOST Fellow project, National Key Basic Research Program of China ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; Yunnan province Postdoctoral Directed Culture Foundation ; Yunnan province Postdoctoral Directed Culture Foundation ; Cultivation Project for LAMOST Scientific Payoff and Research Achievement of CAMS-CAS ; Cultivation Project for LAMOST Scientific Payoff and Research Achievement of CAMS-CAS ; National Development and Reform Commission ; National Development and Reform Commission
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000539101400093
PublisherOXFORD UNIV PRESS
Citation statistics
Document Type期刊论文
Identifierhttp://ir.bao.ac.cn/handle/114a11/83459
Collection中国科学院国家天文台
Corresponding AuthorZhang, Li-yun
Affiliation1.Guizhou Univ, Coll Phys, Guiyang 550025, Guizhou, Peoples R China
2.Chinese Acad Sci, Key Lab Struct & Evolut Celestial Objects, Kunming 650011, Yunnan, Peoples R China
3.Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China
4.Butler Univ, Dept Phys & Astron, Indianapolis, IN 46208 USA
5.Butler Univ, SARA, Indianapolis, IN 46208 USA
6.Yunnan Univ, South Western Inst Astron Res, Kunming 650500, Yunnan, Peoples R China
7.China West Normal Univ, Dept Astron, Nanchong 637009, Peoples R China
8.Howard Univ, Dept Phys & Astron, Washington, DC 20059 USA
Recommended Citation
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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