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 O₂/CO-rich atmospheres on TRAPPIST-1 planets?

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Lazarus
dF star
dF star



Number of posts : 3337
Registration date : 2008-06-12

O₂/CO-rich atmospheres on TRAPPIST-1 planets? Empty
PostSubject: O₂/CO-rich atmospheres on TRAPPIST-1 planets?   O₂/CO-rich atmospheres on TRAPPIST-1 planets? Empty8th December 2019, 7:58 am

A study of the potential atmospheric chemistry on TRAPPIST-1e (and to a lesser extent f). For the amount of CO2 required to maintain habitable conditions, an O2/CO runaway occurs, leading to an atmosphere dominated by these two molecules. This does not appear to be inhibited by nitrogen photochemistry.

Hu et al. "O2- and CO-Rich Atmospheres for Potentially Habitable Environments on TRAPPIST-1 Planets"
https://arxiv.org/abs/1912.02313

This supports earlier results that "habitable" M-dwarf planets (if they exist) are going to have lots of carbon monoxide in their atmospheres. So whatever's there probably won't be using haemoglobin (then again, a lot of life on this planet doesn't use haemoglobin either...)
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Led_Zep
SuperJovian
SuperJovian
Led_Zep


Number of posts : 721
Location : France
Registration date : 2011-09-09

O₂/CO-rich atmospheres on TRAPPIST-1 planets? Empty
PostSubject: Re: O₂/CO-rich atmospheres on TRAPPIST-1 planets?   O₂/CO-rich atmospheres on TRAPPIST-1 planets? Empty15th December 2022, 6:33 am

https://www.nature.com/articles/d41586-022-04452-3

JWST gets first glimpse of 7-planet system with potentially habitable worlds

Astronomers have been eager for the landmark telescope to study the TRAPPIST-1 system.

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