3 years ago

Is Life Most Likely Around Sun-like Stars?.

Abraham Loeb, Manasvi Lingam

We consider the habitability of Earth-analogs around stars of different masses, which is regulated by the stellar lifetime, stellar wind-induced atmospheric erosion, and biologically active ultraviolet (UV) irradiance. By estimating the timescales associated with each of these items, we show that they collectively impose limits on the habitability of Earth-analogs. We conclude that planets orbiting most M-dwarfs are not likely to host life, and that the highest probability of complex biospheres is for planets around K- and G-type stars. Our analysis suggests that the current existence of life near the Sun is slightly unusual, but not significantly anomalous.

Publisher URL: http://arxiv.org/abs/1710.11134

DOI: arXiv:1710.11134v1

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