Risks For Life On Proxima b From Sterilizing Asteroid Impacts

Proxima b Impact Event

We consider the implications that a debris belt located between Proxima b and Proxima c would pose for the rate of large asteroid impacts that could sterilize Proxima b from life.

Future observations by ALMA or JWST could constrain the existence of an asteroid belt in the life-threatening regime. We generalize our rate calculation of sterilizing impacts for habitable planets in systems with an asteroid belt and an outer planet.

Amir Siraj, Abraham Loeb
Comments: 4 pages, 5 figures; submitted for publication in ApJL
Subjects: Earth and Planetary Astrophysics (astro-ph.EP)
Cite as: arXiv:2006.12503 [astro-ph.EP] (or arXiv:2006.12503v1 [astro-ph.EP] for this version)
Submission history
From: Amir Siraj
[v1] Mon, 22 Jun 2020 18:00:00 UTC (4,287 KB)
Astrobiology, Astrochemistry

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