Space Weather Affected Habitable Zones Around Active Stars

Our Sun, a magnetically mild star, exhibits space weather in the form of magnetically driven solar explosive events (SEEs) including solar flares, coronal mass ejections (CME) and solar energetic particle (SEP) events. Extreme SEEs from magnetically active stars can significantly perturb magnetosphere, cause strong geomagnetic storms, initiate escape and introduced chemical changes in exoplanetary atmospheres. We use Kepler data and reconstruction of X-ray and UV emission from young solar-like stars to recover the frequency and energy fluxes from extreme events from active stars including the young Sun. I present our recent simulation results based on multi-dimensional multi-fluid hydrodynamic and magnetohydrodynamic models of interactions of extreme CME and SEP events with magnetospheres and lower atmospheres of early Earth and exoplanets around active stars. We also discuss observational bio-signatures of life “highlighted” by space weather events, the beacons of life.