Frequent Flaring in the TRAPPIST-1 System-Unsuited for Life?

K. Vida, Zs Kvári, A. Pál, K. Oláh, L. Kriskovics

Research output: Contribution to journalArticle

63 Citations (Scopus)

Abstract

We analyze the K2 light curve of the TRAPPIST-1 system. The Fourier analysis of the data suggests P rot = 3.295 ± 0.003 days. The light curve shows several flares, of which we analyzed 42 events with integrated flare energies of 1.26 × 1030-1.24 × 1033 erg. 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, which makes these less favorable for hosting life.

Original languageEnglish
Article number124
JournalAstrophysical Journal
Volume841
Issue number2
DOIs
Publication statusPublished - Jun 1 2017

Keywords

  • stars: activity
  • stars: chromospheres
  • stars: flare
  • stars: late-type
  • stars: low-mass
  • techniques: photometric

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

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