Stellar Flare Study of nearby Young Moving Group Members with TESS Data

Abstract We analyze TESS data to explore stellar flares and rotational characteristics in members of nearby young moving groups (NYMGs). Our study focuses on 417 members of NYMGs aged 10–150 Myr. Using detrended light curves from the TESS Science Office Quick-Look Pipeline, coupled with our own additional detrending scheme for fast rotators, we systematically detect and characterize 6288 stellar flares from 27,416 flare candidates. We analyzed light curves from Cycles 1-4 of the TESS mission, finding that for each NYMG member analyzed, at least one stellar flare was present. Flare candidates are initially detected using the AltaiPony flare package, followed by a recovery of flare amplitudes, durations, and local continuum background levels. We examine the relationship between flare energy, age, and mass, finding a reduced flaring rate for late-type stars with age for high-energy flares, as well as 5.5 times more flares detected in the 10 minute cadence TESS data compared to 30 minute cadence data. Additionally, flare events with extreme energies ( E ≥ 10 34 erg) on M dwarf and solar-type stars provide implications for further exploration into exoplanet habitability.