Searching for Quasi Periodic Pulsations in flares from low mass stars using TESS data

Abstract

We have searched the light curves of low mass stars with TESS 2 min cadence data in Cycles 1 & 2 for Quasi Periodic Pulsations (QPPs) in stellar flares. We identified 11 flares from 7 stars which have QPPs with periods ranging from ~10 min to 70 min. We use several methods for determining the loop length of the flares and find they can extend to a handful of stellar radius. Based on scaling relationships we determine the magnetic field strength in the coronal loops and compare the loop lengths to distance to the habitable zone for the host star.