Photometric Characterization of Ultra Cool Dwarfs: Exploring the Exoplanetary Environments

R. PETRUCCI; Y. GÓMEZ MAQUEO CHEW; E. JOFRÉ

Congreso; III Congreso Latinoamericano de Astrobiología; 2021

Ultra-cool dwarfs (UCDs) are objects with effective temperatures below 3000 K that include fully-convective very-low mass stars and brown dwarfs (Kirkpatrick et al. 1995). According to the core-accretion theory (Pollack et al. 1996), these objects are ideal candidates for hosting terrestrial planets. Hence, it is crucial to describe and quantify their activity to explore and characterize the environments to which potential planets would be exposed. With this idea in mind, in this contribution, we present preliminary results of a search for flares and rotation periods in a sample of 157 UCDs with spectral types between M4 and L3, observed in 2-minute cadence with the space mission TESS (Ricker et al. 2015).