The Connection between Starspots and Flares on Main-sequence Kepler Stars

The Connection between Starspots and Flares on Main-sequence Kepler Stars
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主序开普勒星上的星黑子和耀斑之间的联系

DOI:
10.3847/1538-4357/aae77e
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发表时间:
2018
期刊:
The Astrophysical Journal
影响因子:
--
通讯作者:
K. Vida
K. Vida
中科院分区:
--
文献类型:
--
作者:
R. Roettenbacher;K. Vida

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星黑子和耀斑是恒星磁活动的指标,可以利用开普勒卫星的长期天基档案进行更详细的研究。在这里,我们的目标是研究开普勒档案的一个子集,以揭示星黑子和恒星耀斑之间的联系,以便深入了解整个恒星磁场。我们将耀斑寻找算法 FLATW’RM 与一套新算法结合使用,旨在定位由星斑群引起的局部最小值。我们比较了耀斑最大通量时间和星斑群导致的最小恒星通量时间之间的相位差。最强的耀斑似乎与存在的最大星黑子群无关,但相对于星黑子群的相位也不是均匀分布的。然而,较弱的耀斑确实表明星黑子群附近的耀斑发生率有所增加。
Starspots and flares are indicators of stellar magnetic activity and can both be studied in greater detail by utilizing the long-term, space-based archive of the Kepler satellite. Here, we aim to investigate a subset of the Kepler archive to reveal a connection between the starspots and the stellar flares, in order to provide insight into the overall stellar magnetic field. We use the flare-finding algorithm FLATW’RM in conjunction with a new suite of algorithms that aim to locate the local minima caused by starspot groups. We compare the phase difference between the time of maximum flux of a flare and the time of minimum stellar flux due to a starspot group. The strongest flares do not appear to be correlated to the largest starspot group present, but are also not uniformly distributed in phase with respect to the starspot group. The weaker flares, however, do show an increased occurrence close to the starspot groups.
DOI: 10.3847/1538-4357/aa8ef7
发表时间: 2017-09
期刊: The Astrophysical Journal
影响因子: --
作者:
R. Roettenbacher;J. Monnier;H. Korhonen;R. Harmon;F. Baron;T. Hackman;G. Henry;G. Schaefer;K. Strassmeier;M. Weber;T. Brummelaar
通讯作者: R. Roettenbacher;J. Monnier;H. Korhonen;R. Harmon;F. Baron;T. Hackman;G. Henry;G. Schaefer;K. Strassmeier;M. Weber;T. Brummelaar
DOI: 10.1051/0004-6361/201321970
发表时间: 2013-08
影响因子: 6.5
作者:
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通讯作者: T. Reinhold;A. Reiners;G. Basri
DOI: 10.1088/2041-8205/813/2/l31
发表时间: 2015
期刊: The Astrophysical Journal Letters
影响因子: --
作者:
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通讯作者: Christensen