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Stellar Flares as an Aid to Life Detection by Paul Gilster on December 23, 2020 The interesting transient associated with Proxima Centauri and monitored by Breakthrough Listen reminds us of a key fact about red dwarf stars and the planets around them. Such stars, especially in their youth, are prone to high flare activity, meaning violent, unpredictable emissions that can deplete atmospheric gases like ozone. Even if the atmosphere survives strong stellar winds, the loss of ozone can lead to high levels of ultraviolet radiation reaching the surface and compromising any life there. That stellar flares can be dramatic is captured in the image below, showing a filament eruption from the Sun and accompanying solar flares (credit: NASA/GSFC/SDO). As striking as the image is, it depicts activity on an older star less prone to strong flare activity than younger, smaller stars. We’re also fortunate in having the shield offered by Earth’s magnetic field, which can deflect

Howard chenProxima centauriUniversity of colorado at boulderGoddard space flight centers wiessingerMassachusetts institute of technologyUniversity of chicagoNorthwestern universityExoplanet survey satelliteBreakthrough listenG class sunNature astronomyMassachusetts instituteExoplanet system scienceஹோவர்ட் சென்பல்கலைக்கழகம் ஆஃப் கொலராடோ இல் கற்பாறைமாசசூசெட்ஸ் நிறுவனம் ஆஃப் தொழில்நுட்பம்