A Readily Implemented Atmosphere Sustainability Constraint for Terrestrial Exoplanets Orbiting Magnetically Active Stars

Abstract With more than 4300 confirmed exoplanets and counting, the next milestone in exoplanet research is to determine which of these newly found worlds could harbor life. Coronal mass ejections (CMEs), spawned by magnetically active, superflare-triggering dwarf stars, pose a direct threat habitability terrestrial exoplanets, as they can deprive them their atmospheres. Here we develop readily implementable atmosphere sustainability constraint for orbiting active dwarfs, relying on magnetospheric compression caused CME impacts. Our focuses an understanding CMEs propagation our own Sun–heliosphere system that, applied given requires key input observed bolometric energy flares emitted its host star. Application six famous Kepler-438b, Proxima Centauri b, Trappist-1d, -1e, -1f, -1g, within or immediate proximity stellar host’s habitable zones showed that only Kepler-438b might atmospheric against be likely. This seems align with some recent studies however, may require far demanding computational resources observational inputs. physically intuitive en masse applied, generalized, large-scale surveys detect planets warrant further scrutiny atmospheres and, perhaps, possible biosignatures at higher priority current future instrumentation.