Studies of the rotation-activity relation of late-type stars are essential to enhance our understanding of stellar dynamos and angular momentum evolution. We study the rotation-activity relation with K2 for M dwarfs where it is especially poorly understood. We analyzed the light curves of all bright and nearby M dwarfs form the Superblink proper motion catalog that were in the K2 field of view. For a sample of 430 M dwarfs observed in campaigns C0-C19 in long cadence mode we determined the rotation period and a wealth of activity diagnostics. Our study of the rotation-activity relation based on photometric activity indicators confirmed the previously published abrupt change of the activity level at a rotation period of ~10d. Our more than three times larger sample increases the statistical significance of this finding.
@article{arxiv.2005.08688,
title = {The rotation-activity relation of M dwarfs: From K2 to TESS and PLATO},
author = {St. Raetz and B. Stelzer and A. Scholz},
journal= {arXiv preprint arXiv:2005.08688},
year = {2020}
}
Comments
Accepted for publication in Astronomical Notes (AN). 28 pages 11 figures, 4 tables. The tables are available in ascii format at http://straetz.stiller-berg.de/7.html