SIMBAD references

2015ApJ...798...92W - Astrophys. J., 798, 92 (2015/January-2)

A study of variability in the frequency distributions of the superflares of G-type stars observed by the Kepler mission.

WU C.-J., IP W.-H. and HUANG L.-C.

Abstract (from CDS):

The energy and time profiles of 4944 superflares from 77 G-type stars with well-defined light curve periodicities from the Kepler measurements have been analyzed in detail. The total value of the power-law index of the flare frequency distribution as a function of energy (dN/dE ∝ E –γ) between 5x1034 and 1036 erg is on average γ = 2.04±0.17, which is in agreement with previous results. The γ values of eight stars with frequent flaring activity vary between 1.59±0.06 and 2.11±0.19, suggesting a possible diversity of energy release effects. In general, stars with shorter rotation periods tend to have larger γ values. There is an indication that the flare energy is saturated at about 2x1037 erg. For a few large superflares of this energy range, it is found that their temporal behaviors could be characterized by a transition from single impulsive flares to long-duration flares composed of several flares.

Abstract Copyright:

Journal keyword(s): stars: activity - stars: flare - stars: rotation - stars: solar-type - stars: statistics

Simbad objects: 78

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