English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

An investigation of the G-type stellar population with Kepler (as done byMaehara et al.) shows that less than 1 per cent of those stars showsuperflares. Due to the large pixel scale of Kepler ($\sim4 arcsec \:px^{-1}$), it is still not clear whether the detected superflares really occuron the G-type stars. Knowing the origin of such large brightenings is importantto study their frequency statistics, which are uncertain due to the low numberof sun-like stars ($T_{eff} = 5600-6000 \:K$ and $P_{rot} > 10 \:d$) which arecurrently considered to exhibit superflares. We present a complete Kepler dataanalysis of the sun-like stars KIC10524994 and KIC07133671 (the only two starswithin this subsample of solar twins with flare energies larger than $10^{35}$erg; Maehara et al.), regarding superflare properties and a study about theirorigin. We could detect four new superflares within the epoch Maehara et al.investigated and found 14 superflares in the remaining light curve forKIC10524994. Astrometric Kepler data of KIC07133671 show that the photocentreis shifted by 0.006 px or 25 mas during the one detected flare. Hence, theflare probably originated from another star directed towards the north-east.This lowers the superflare rate of sun-like stars (and hence the Sun) for $E >10^{35}$ erg, since this additional star is probably not solar-like.

Superflares on the slowly rotating solar-type stars KIC10524994 and KIC07133671?