TESS Investigation of flaring activities on an active fast-rotating K-dwarf LO Peg

Le résumé fourni par la source

LO Pegasi (LO Peg) is a young, active, single K5–K8 main-sequence ultra-fast rotator (UFR, Prot ≈ 0.4232 d, v sin i >65 km s−1 ). Using continuous high-precision space photometry from NASA’s Transiting Exoplanet Survey Satellite (TESS)across Sector 55 (2-minute cadence) and Sector 82 (ultra-short 20-second cadence) spanning a 51-day baseline, we investigatemagnetic activity on LO Peg. In this proceeding article, we present preliminary results on stellar flaring events and spot dynam-ics. We identified 146 flaring events yielding an elevated flare frequency of ∼2.84 flares/day, roughly six times higher thanground-based estimates. Flare energies span 1032−1036 erg. Finally, we found that the flares and superflares are co-spatiallydistributed with active longitude spot regions derived from iPH light-curve inversions.

Ce résumé expose les affirmations des auteurs. BNTIC ne l’interprète pas comme une validation indépendante des résultats.