ultraviolet radiation from F and K stars and implications for planetary habitability

  title={ultraviolet radiation from F and K stars and implications for planetary habitability},
  author={James F Kasting and Douglas C. B. Whittet and William R. Sheldon},
  journal={Origins of life and evolution of the biosphere},
Now that extrasolar planets have been found, it is timely to ask whether some of them might be suitable for life. Climatic constraints on planetary habitability indicate that a reasonably wide habitable zone exists around main sequence stars with spectral types in the early-F to mid-K range. However, it has not been demonstrated that planets orbiting such stars would be habitable when biologically-damaging energetic radiation is also considered. The large amounts of UV radiation emitted by… 

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