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Can Superflares Occur on Our Sun ?  

Kazunari Shibata   Submitted: 2012-12-14 22:29

Recent observations of solar type stars with the Kepler satellite by Maehara et al. have revealed the existence of superflares (with energy of 1033 - 1035 erg) on Sun-like stars, which are similar to our Sun in their surface temperature (5600 K - 6000 K) and slow rotation (rotational period > 10 days). From the statistical analysis of these superflares, it was found that superflares with energy 1034 erg occur once in 800 years and superflares with 1035 erg occur once in 5000 years on Sun-like stars. In this paper, we examine whether superflares with energy of 1033 - 1035 erg could occur on the present Sun through the use of simple order-of-magnitude estimates based on current ideas relating to the mechanisms of the solar dynamo.

Authors: Kazunari Shibata, Hiroaki Isobe, Andrew Hillier, Arnab Rai Choudhuri, Hiroyuki Maehara, Takako T. Ishii, Takuya Shibayama, Shota Notsu, Yuta Notsu, Takashi Nagao, Satoshi Honda, Daisaku Nogami
Projects: None

Publication Status: Publ. Astron. Soc. Japan, vol. 65, No. 3, June, 2013, in press
Last Modified: 2012-12-15 10:48
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