Risks for Life on Habitable Planets from Superflares of Their Host Stars

@article{Lingam2017RisksFL,
  title={Risks for Life on Habitable Planets from Superflares of Their Host Stars},
  author={Manasvi Lingam and Abraham Loeb},
  journal={The Astrophysical Journal},
  year={2017},
  volume={848}
}
  • M. Lingam, A. Loeb
  • Published 14 August 2017
  • Physics, Geology
  • The Astrophysical Journal
We explore some of the ramifications arising from superflares on the evolutionary history of Earth, other planets in the solar system, and exoplanets. We propose that the most powerful superflares can serve as plausible drivers of extinction events, and that their periodicity corresponds to certain patterns in the terrestrial fossil diversity record. On the other hand, weaker superflares may play a positive role in enabling the origin of life through the formation of key organic compounds… 

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Considering the increase in the UV flux by the strongest superflare emission, Escherichia coli and Deinococcus radiodurans could survive on the surface of the planet only if there was an ozone layer present on the planet atmosphere, but could escape from the hazardous UV effects at a depth of 28 and 12 m below the ocean surface, respectively.

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