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MAGNETIC ACTIVITY ANALYSIS FOR A SAMPLE OF G-TYPE MAIN SEQUENCE KEPLER TARGETS
Mehrabi, Ahmad1,2; He, Han3,4; Khosroshahi, Habib2
2017-01-10
Source PublicationASTROPHYSICAL JOURNAL
Volume834Issue:2
AbstractThe variation of a stellar light curve owing to rotational modulation by magnetic features (starspots and faculae) on the star's surface can be used to investigate the magnetic properties of the host star. In this paper, we use the periodicity and magnitude of the light-curve variation as two proxies to study the stellar magnetic properties for a large sample of G-type main sequence Kepler targets, for which the rotation periods were recently determined. By analyzing the correlation between the two magnetic proxies, it is found that: (1) the two proxies are positively correlated for most of the stars in our sample, and the percentages of negative, zero, and positive correlations are 4.27%, 6.81%, and 88.91%, respectively; (2) negative correlation stars cannot have a large magnitude of light-curve variation; and (3) with the increase of rotation period, the relative number of positive correlation stars decreases and the negative correlation one increases. These results indicate that stars with shorter rotation period tend to have positive correlation between the two proxies, and a good portion of the positive correlation stars have a larger magnitude of light-curve variation (and hence more intense magnetic activities) than negative correlation stars.
SubtypeArticle
KeywordStars: Activity Stars: Magnetic Field Stars: Rotation Stars: Solar-type
WOS HeadingsScience & Technology ; Physical Sciences
Funding OrganizationNASA Science Mission Directorate ; NASA Science Mission Directorate ; NASA Science Mission Directorate ; NASA Science Mission Directorate
DOI10.3847/1538-4357/834/2/207
WOS KeywordSOLAR-TYPE STARS ; PHOTOMETRIC VARIABILITY ; STELLAR GRANULATION ; ROTATION PERIODS ; LIGHT CURVES ; MISSION ; FIELD ; SUN ; SUPERFLARES ; EVOLUTION
Indexed BySCI
Language英语
Funding OrganizationNASA Science Mission Directorate ; NASA Science Mission Directorate ; NASA Science Mission Directorate ; NASA Science Mission Directorate
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000400149000002
Citation statistics
Cited Times:5[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.bao.ac.cn/handle/114a11/8858
Collection太阳物理研究部
Affiliation1.Bu Ali Sina Univ, Dept Phys, Hamadan 016016, Iran
2.Inst Res Fundamental Sci IPM, Sch Astron, Tehran 193955531, Iran
3.Chinese Acad Sci, Natl Astron Observ, Beijing, Peoples R China
4.Chinese Acad Sci, Key Lab Solar Act, Beijing, Peoples R China
Recommended Citation
GB/T 7714
Mehrabi, Ahmad,He, Han,Khosroshahi, Habib. MAGNETIC ACTIVITY ANALYSIS FOR A SAMPLE OF G-TYPE MAIN SEQUENCE KEPLER TARGETS[J]. ASTROPHYSICAL JOURNAL,2017,834(2).
APA Mehrabi, Ahmad,He, Han,&Khosroshahi, Habib.(2017).MAGNETIC ACTIVITY ANALYSIS FOR A SAMPLE OF G-TYPE MAIN SEQUENCE KEPLER TARGETS.ASTROPHYSICAL JOURNAL,834(2).
MLA Mehrabi, Ahmad,et al."MAGNETIC ACTIVITY ANALYSIS FOR A SAMPLE OF G-TYPE MAIN SEQUENCE KEPLER TARGETS".ASTROPHYSICAL JOURNAL 834.2(2017).
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