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Clara Brasseur (Space Telescope Science Institute): Stellar Flares in GALEX and Kepler

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Abstract: Flares on cool stars indicate short time-scale magnetic reconnection processes that provide temporary increases in the stellar radiative output. While recent work has focused on long-duration flares from solar-like stars and those of lower mass, the existence of short-duration flares in the ultraviolet has not been systematically probed before. I will present an interesting population of short duration flares we discovered in a sample of 34,000 light curves observed from 2009-2012 by the GALEX and Kepler missions. These flares range in duration from under a minute to a few minutes and are almost entirely distinct from previous surveys. We were able to detect this unique population of flares because the time resolution of the GALEX data allowed us to construct light curves with a 10 second cadence and thus detect shorter duration flares than could be detected within Kepler data. I will also present the current status of our exploration of potential Kepler counterparts to our detected GALEX flares.

Tags: CFSA Seminar

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