Superflares on Late-Type Stars. Issue Volume 8:Issue S293(2012) (29th April 2014)

• Record Type: Journal Article
• Authors: Maehara, Hiroyuki; Shibayama, Takuya; Notsu, Yuta; Notsu, Shota; Nagao, Tanashi; Honda, Satoshi; Nogami, Daisaku; Shibata, Kazunari
• Is Part Of: Proceedings of the International Astronomical Union. Volume 8:Issue S293(2012)
• Page Start: 393
• Page End: 395
• Publication Date: 2014-04-29
• Subjects: stars: flare, -- stars: late-type; Astronomy -- Congresses; Astronomy -- Periodicals; 520
• DOI: 10.1017/S1743921313013239
• Languages: English
• ISSNs: 1743-9213

Abstract

Abstract: We present the results of an extensive survey of superflares on late-type stars (G, K, and M-type main sequence stars) using the Kepler satellite data. Wefound about 6, 800 superflares on late-type stars from the data of about 120, 000 stars observed over 500 days. The total bolometric energy of superflares in oursample ranges from 10 32 erg to 10 36 erg. Our data suggest that the occurrencefrequency of superflares depends on the surface temperature and the rotationperiod of stars. Superflares on M-type stars occur about 10-100 times morefrequently than those on G-type stars. Our results suggest that the average frequency ofsuperflares releasing 10 34 –10 35 erg of energy (100-1, 000 times larger than the largestsolar flares) on M-type stars and Sun-like stars is once in 10 years and once in a few thousand years respectively.