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IPM
30
YEARS OLD

“School of Astronomy”

Paper   IPM / Astronomy / 15607
   School of Astronomy
  Title: Phase difference between long-term magnetic feature activity and flare activity of solar-type stars
  Author(s):
1 . Han. He
2 . Huaning. Wang
3 . Mei. Zhang
4 . Ahmad. Mehrabi
5 . Yan. Yan
6 . Duo. Yun
  Status: Published
  Journal: IAU
  Vol.: 13
  Year: 2018
  Pages: 217-220
  Supported by:           ipm IPM
  Abstract:
In the light curves of some solar-type stars, both rotational modulation (caused by corotating bright or dark magnetic features) and flare phenomena can be seen simultaneously. Based on these light curve observations, the relation between stellar magnetic feature activity (reflected by the rotational modulation component of the light curves) and flare activity can be investigated. Here, we analyze the light curve data of a flare-abundant solar-type star, KIC 6034120, observed with Kepler space telescope, and describe magnetic feature activity property by fluctuation range of light curves and flare activity property by time occupation ratio of flares. Distinct phase difference between long-term magnetic feature activity and flare activity is found for this star, which indicates that the source regions of stellar flares (e.g., starspots) on this star do not dominate the rotational modulation of light curves, yet they might be related to a same stellar dynamo process.

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