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- W2906344579 abstract "We analyze physical characteristics of late-type stars wherein the Kepler mission registered superflares. We use the revised stellar fundamental parameters, i.e. effective temperatures Teff and surface gravity accelerations log g, from the Kepler archive published in 2017, as compared to previous studies by Balona (2015) based on the release of 2011. Among superflare stars there are both single objects and members of eclipsing binaries. We select the late-type stars (with Teff < 6500 K) wherein occured the most powerful flares with the total flare energy >1035 erg and consider their locations in the Teff – log g diagram. Both components of binaries and single stars appear to reside mostly in between the main sequence and the subgiant branches and therefore have larger radii compared to that of the Sun. Besides, as a rule these single stars are fast rotators and can be considered as young objects that it is difficult to attribute to “solar-type stars”. Extremely high flare energy of these stars requires quite strong magnetic fields that cannot be generated even due to scaling of the solar dynamo. Apparently, for explanation of the strongest non-stationary phenomena on stars considered, it would be worthwhile to attract another regime of the dynamo mechanism that can be realized in these objects." @default.
- W2906344579 created "2019-01-01" @default.
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- W2906344579 date "2018-12-01" @default.
- W2906344579 modified "2023-10-13" @default.
- W2906344579 title "Properties of Kepler Stars with the Most Powerful Flares" @default.
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- W2906344579 doi "https://doi.org/10.1134/s0016793218070095" @default.
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