Observational evidence for enhanced magnetic activity of superflare stars

	Observational evidence for enhanced magnetic activity of superflare stars
	Karoff, Christoffer 1,2; Knudsen, Mads Faurschou 1; De Cat, Peter 3; Bonanno, Alfio 4; Fogtmann-Schulz, Alexandra 1; Fu, Jianning 5; Frasca, Antonio 4; Inceoglu, Fadil 1; Olsen, Jesper 6; Zhang, Yong 7
刊名	NATURE COMMUNICATIONS
	2016-03-01
卷号	7
英文摘要	Superflares are large explosive events on stellar surfaces one to six orders-of-magnitude larger than the largest flares observed on the Sun throughout the space age. Due to the huge amount of energy released in these superflares, it has been speculated if the underlying mechanism is the same as for solar flares, which are caused by magnetic reconnection in the solar corona. Here, we analyse observations made with the LAMOST telescope of 5,648 solar-like stars, including 48 superflare stars. These observations show that superflare stars are generally characterized by larger chromospheric emissions than other stars, including the Sun. However, superflare stars with activity levels lower than, or comparable to, the Sun do exist, suggesting that solar flares and superflares most likely share the same origin. The very large ensemble of solar- like stars included in this study enables detailed and robust estimates of the relation between chromospheric activity and the occurrence of superflares.
收录类别	SCI
语种	英语
WOS记录号	WOS:000372887900001
内容类型	期刊论文
源URL	[http://ir.bao.ac.cn/handle/114a11/5353]
专题	国家天文台_光学天文研究部
作者单位	1.Aarhus Univ, Dept Geosci, Hoegh Guldbergs Gade 2, DK-8000 Aarhus C, Denmark 2.Aarhus Univ, Dept Phys & Astron, Stellar Astrophys Ctr, Ny Munkegade 120, DK-8000 Aarhus C, Denmark 3.Royal Observ Belgium, Ringlaan 3, B-1180 Brussels, Belgium 4.INAF, Osservatorio Astrofisico Catania, Via S Sofia 78, I-95123 Catania, Italy 5.Beijing Normal Univ, Dept Astron, 19 Ave Xinjiekouwai, Beijing 100875, Peoples R China 6.Aarhus Univ, Dept Phys, Dating Ctr 14C, AMS, Ny Munkegade 120, DK-8000 Aarhus C, Denmark 7.Chinese Acad Sci, Natl Astron Observat, Nanjing Inst Astron Opt & Technol, Nanjing 210042, Jiangsu, Peoples R China 8.Chinese Acad Sci, Natl Astron Observat, Key Lab Opt Astron, Beijing 100012, Peoples R China
推荐引用方式 GB/T 7714	Karoff, Christoffer,Knudsen, Mads Faurschou,De Cat, Peter,et al. Observational evidence for enhanced magnetic activity of superflare stars[J]. NATURE COMMUNICATIONS,2016,7.
APA	Karoff, Christoffer.,Knudsen, Mads Faurschou.,De Cat, Peter.,Bonanno, Alfio.,Fogtmann-Schulz, Alexandra.,...&Zhang, Wei.(2016).Observational evidence for enhanced magnetic activity of superflare stars.NATURE COMMUNICATIONS,7.
MLA	Karoff, Christoffer,et al."Observational evidence for enhanced magnetic activity of superflare stars".NATURE COMMUNICATIONS 7(2016).