Studying Stellar Activity with a XMM-Kepler Joint Project

Physics

Scientific paper

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Stars, White Dwarfs, Solar System, Kepler1A, Kepler1B, Kepler1C, Kepler1D

Scientific paper

We propose to survey 3 sq. deg. of sky within the Kepler target area with 12 XMM pointing of 80 ksec each. We will take advantage of the unprecedented accuracy, duration and duty cycle of the white-light light-curves (LCs), obtained by Kepler on a large, statistically meaningful stellar sample. These allow us to reliably determine the rotational periods of slow rotators and to obtain simultaneous optical and X-rays observations. The proposed observations will allow us i) to derive the size of active regions in a large sample of stars (hundreds, spanning different activity regimes), ii) to constrain coronal heating mechanisms and iii) to explore the slow rotation regime in low mass stars, using a variety of diagnostics described in the proposal.

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