We analyze short cadence K2 light curve of the TRAPPIST-1 system. Fourier analysis of the data suggests Prot=3.295±0.003 days. The light curve shows several flares, of which we analyzed 42 events, these have integrated flare energies of 1.26×1030−1.24×1033 ergs. Approximately 12% of the flares were complex, multi-peaked eruptions. The flaring and the possible rotational modulation shows no obvious correlation. The flaring activity of TRAPPIST-1 probably continuously alters the atmospheres of the orbiting exoplanets, making these less favorable for hosting life.
@article{arxiv.1703.10130,
title = {Frequent flaring in the TRAPPIST-1 system - unsuited for life?},
author = {Krisztián Vida and Zsolt Kővári and András Pál and Katalin Oláh and Levente Kriskovics},
journal= {arXiv preprint arXiv:1703.10130},
year = {2017}
}