Short-duration high-amplitude flares detected on the M dwarf star KIC 5474065

Using data obtained during the RATS-Kepler project, we identified one short-duration flare in a 1 h sequence of ground-based photometry of the dwarf star KIC 5474065. Observations made using Gran Telescopio Canarias show that it is a star with an M4V spectral type. Kepler observations made using 1 m...

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Bibliographic Details
Published in:Monthly notices of the Royal Astronomical Society 2013-09, Vol.434 (3), p.2451-2457
Main Authors: Ramsay, Gavin, Doyle, J. Gerry, Hakala, Pasi, Garcia-Alvarez, David, Brooks, Adam, Barclay, Thomas, Still, Martin
Format: Article
Language:English
Subjects:
Dwarf stars
Extrasolar planets
Sampling
Solar flares
Space telescopes
Spectrum analysis
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Summary:Using data obtained during the RATS-Kepler project, we identified one short-duration flare in a 1 h sequence of ground-based photometry of the dwarf star KIC 5474065. Observations made using Gran Telescopio Canarias show that it is a star with an M4V spectral type. Kepler observations made using 1 min sampling show that KIC 5474065 exhibits large-amplitude (δF/F > 0.4) optical flares which have a duration as short as 10 min. We compare the energy distribution of flares from KIC 5474065 with that of KIC 9726699, which has also been observed using 1-min sampling, and ground-based observations of other M dwarf stars in the literature. We discuss the possible implications these short-duration, relatively low-energy flares would have on the atmosphere of exoplanets orbiting in the habitable zone of these flare stars.
ISSN:0035-8711
1365-2966
DOI:10.1093/mnras/stt1182