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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, whi ....

Howard Chen , Proxima Centauri , University Of Colorado At Boulder , Goddard Space Flight Centers Wiessinger , Massachusetts Institute Of Technology , University Of Chicago , Northwestern University , Exoplanet Survey Satellite , Breakthrough Listen , G Class Sun , Nature Astronomy , Massachusetts Institute , Exoplanet System Science , ஹோவர்ட் சென் , பல்கலைக்கழகம் ஆஃப் கொலராடோ இல் கற்பாறை , மாசசூசெட்ஸ் நிறுவனம் ஆஃப் தொழில்நுட்பம் , பல்கலைக்கழகம் ஆஃப் சிகாகோ , வடமேற்கு பல்கலைக்கழகம் , திருப்புமுனை கேளுங்கள் , க் வர்க்கம் சூரியன் , இயற்கை வானியல் , மாசசூசெட்ஸ் நிறுவனம் ,