Largest ever sample of super flares
University of North Carolina at Chapel Hill
New research will help astrobiologists understand how much radiation planets experience during super flares and whether life could exist on worlds beyond our solar system.
Ultraviolet light from giant stellar flares can destroy a planet’s habitability. New research from the University of North Carolina at Chapel Hill will help astrobiologists understand how much radiation planets experience during super flares and whether life could exist on worlds beyond our solar system.
Super flares are bursts of energy that are 10 to 1,000 times larger than the biggest flares from the Earth’s sun. These flares can bathe a planet in an amount of ultraviolet light huge enough to doom the chances of life surviving there.
Researchers from UNC-Chapel Hill have for the first time measured the temperature of a large sample of super flares from stars, and the flares’ likely ultraviolet emissions. Their findings, published Oct. 5 ahead of print in Astrophysical Journal, will allow researchers to put limits on the habitability of planets that are targets of upcoming planet-finding missions.
“We found planets orbiting young stars may experience life-prohibiting levels of UV radiation, although some micro-organisms might survive,” said lead study author Ward S. Howard, a doctoral student in the Department of Physics and Astronomy at UNC-Chapel Hill.
Howard and colleagues at UNC-Chapel Hill used the UNC-Chapel Hill Evryscope telescope array and NASA’s Transiting Exoplanet Survey Satellite (TESS) to simultaneously observe the largest sample of super flares.
The team’s research expands upon previous work that has largely focused on flare temperatures and radiation from only a handful of super flares from a few stars. In expanding the research, the team discovered a statistical relationship between the size of a super flare
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