Stephane Mazevet<\/strong><\/p>\n\n\n\n Observatoire de la C\u00f4te d\u2019Azur, University C\u00f4te d\u2019Azur, Nice (France)<\/p>\n\n\n\n With thousands of exoplanets now identified, the characterization of habitable planets and the potential Stephane Mazevet Observatoire de la C\u00f4te d\u2019Azur, University C\u00f4te d\u2019Azur, Nice (France) With thousands of exoplanets now identified, the characterization…<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"ngg_post_thumbnail":0},"categories":[1,40,13],"tags":[120],"acf":[],"_links":{"self":[{"href":"https:\/\/depts.washington.edu\/astrobio\/wordpress\/wp-json\/wp\/v2\/posts\/6011"}],"collection":[{"href":"https:\/\/depts.washington.edu\/astrobio\/wordpress\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/depts.washington.edu\/astrobio\/wordpress\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/depts.washington.edu\/astrobio\/wordpress\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/depts.washington.edu\/astrobio\/wordpress\/wp-json\/wp\/v2\/comments?post=6011"}],"version-history":[{"count":1,"href":"https:\/\/depts.washington.edu\/astrobio\/wordpress\/wp-json\/wp\/v2\/posts\/6011\/revisions"}],"predecessor-version":[{"id":6013,"href":"https:\/\/depts.washington.edu\/astrobio\/wordpress\/wp-json\/wp\/v2\/posts\/6011\/revisions\/6013"}],"wp:attachment":[{"href":"https:\/\/depts.washington.edu\/astrobio\/wordpress\/wp-json\/wp\/v2\/media?parent=6011"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/depts.washington.edu\/astrobio\/wordpress\/wp-json\/wp\/v2\/categories?post=6011"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/depts.washington.edu\/astrobio\/wordpress\/wp-json\/wp\/v2\/tags?post=6011"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
identification of inhabited ones is a major challenge for the coming decades. To address this challenge,
we developed an innovative approach to assess habitability and inhabitation by coupling for the first
time the atmosphere and the interior modeling with the biological activity based on ecosystem modeling.
I will review the results we obtained in four different situations where habitability and inhabitation are in
question. We first applied the method to asses the possibility of methanogenic activity at the Enceladus
ocean floor and provide an interpretation for the plume composition measured by the Cassini mission[1].
Secondly, we quantified the impact of methanogenic activity on the composition of the early Earth
atmosphere and its influence on the long term climate[2]. Thirdly, we considered Early Mars to asses
favorable landing sites to investigate whether methanogenesis started 4 billion years ago[3]. Lastly, we
applied the method to habitable Earth-like planets around G-type stars to inform the design of future
space missions[4].
[1] A. Affholder, F. Guyot, B. Sauterey, R. Ferri\u00e8re, S. Mazevet, \u201cBayesian analysis of Enceladus\u2019s plume data to assess
methanogenesis\u201d, Nature Astronomy 5 (2021), p. 805-814.
[2] B. Sauterey, B. Charnay, A. Affholder, S. Mazevet, R.F erri\u00e8re,\u201cCo-evolution of primitive methane-cycling ecosystems and
early Earth\u2019s atmosphere and climate\u201d, Nature Communications 11 (2020).
[3] B. Sauterey, B. Charnay, A. Affholder, S. Mazevet, R. Ferri\u00e8re,\u201cEarly Mars habitability and global cooling by H2-based
methanogens\u201d, Nature Astronomy (2022).
[4] S. Mazevet, A. Affholder, B. Sauterey, A. Bixel, D. Apai and R. Ferriere \u00ab Prospects for the characterization of habitable
planets \u00bb, Comptes rendus de l\u2019acad\u00e9mie des sciences, physique, pp. 1-16. doi : 10.5802\/crphys.154. (2023)<\/p>\n","protected":false},"excerpt":{"rendered":"