Photosynthesis on habitable planets around low-mass stars

  title={Photosynthesis on habitable planets around low-mass stars},
  author={Manasvi Lingam and Abraham Loeb},
  journal={Monthly Notices of the Royal Astronomical Society},
  • M. LingamA. Loeb
  • Published 4 January 2019
  • Physics, Geology
  • Monthly Notices of the Royal Astronomical Society
We show that planets around M-dwarfs with $M_\star \lesssim 0.2 M_\odot$ may not receive enough photons in the photosynthetically active range of $400$-$750$ nm to sustain Earth-like biospheres. As a result of the lower biological productivity, it is likely that biotic molecular oxygen would not build up to detectable levels in the atmospheres of habitable planets orbiting low-mass stars, consistent with prior work by Lehmer et al. (2018). We also estimate the minimum flaring rate for… 

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