Main Sequence Star Super-flare Frequency based on Entire Kepler Data  

作　　者：A.K.Althukair D.Tsiklauri 

机构地区：[1]Department of Physics and Astronomy,School of Physical and Chemical Sciences,Queen Mary University of London,Mile End Road,London,E14NS,United Kingdom [2]Physics Department,College of Sciences,Princess Nourah Bint Abdulrahman University,Riyadh,PO Box 84428,Saudi Arabia ORCID iDs

出　　处：《Research in Astronomy and Astrophysics》2023年第8期256-276,共21页天文和天体物理学研究（英文版）

基　　金：operated by the Association of Universities for Research in Astronomy,Inc.,under NASA contract NAS5-26555;provided by the NASA Office of Space Science via grant NNX13AC07G;the financial support of her PhD scholarship,held at Queen Mary University of London。

摘　　要：We wrote and used an automated flare detection Python script to search for super-flares on main sequence stars of types A,F,G,K and M in Kepler's long-cadence data from Q0 to Q17.We studied the statistical properties of the occurrence rate of super-flares.For the G-type data set,we compared our results with the previous results of Okamoto et al.by splitting the data set into four rotational bands.We found similar power-law indices for the flare frequency distribution.Hence,we show that inclusion of a high-pass filter,sample biases,gyrochronology and completeness of flare detection is of no significance,as our results are similar to those of Okamoto et al.We estimated that a super-flare on G-type dwarfs with energy of 10^(35) erg occurs on a star once every 4360 yr.We found 4637 super-flares on 1896 G-type dwarfs.Moreover,we identified 321,1125,4538 and 5445 super-flares on 136,522,770 and 312 dwarfs of types A,F,K and M,respectively.We ascertained that the occurrence rate(dN/dE)of super-flares versus flare energy,E,shows a power-law distribution with dN/dE∝E^(-α),whereα■2.0 to 2.1 for the spectral types from F-type to M-type stars.In contrast,the obtainedα■1.3 for A-type stars suggests that the flare conditions differ from those of the other spectral-type stars.We note an increase in flare incidence rate in F-type to M-type stars and a decrease in A-type to F-type stars.

关 键 词：Sun flares-stars flare-stars solar-type-(stars:)starspots-stars statistics-stars rotation-stars activity 

分 类 号：P182.52[天文地球—天文学]