Potential Biosignatures in Super-Earth Atmospheres II. Photochemical Responses
| hal.structure.identifier | Zentrum für Astronomie und Astrophysik [Berlin] [ZAA] | |
| dc.contributor.author | GRENFELL, J. L. | |
| dc.contributor.author | GEBAUER, S. | |
| dc.contributor.author | GODOLT, M. | |
| dc.contributor.author | PALCZYNSKI, K. | |
| dc.contributor.author | RAUER, H. | |
| dc.contributor.author | STOCK, J. | |
| hal.structure.identifier | SSE 2013 | |
| dc.contributor.author | VON PARIS, P. | |
| hal.structure.identifier | Alfred-Wegener-Institut, Helmholtz-Zentrum für Polar- und Meeresforschung = Alfred Wegener Institute for Polar and Marine Research = Institut Alfred-Wegener pour la recherche polaire et marine [AWI] | |
| dc.contributor.author | LEHMANN, R. | |
| hal.structure.identifier | SSE 2013 | |
| dc.contributor.author | SELSIS, Franck | |
| dc.date.created | 2013-03-27 | |
| dc.date.issued | 2013 | |
| dc.identifier.issn | 1531-1074 | |
| dc.description.abstractEn | Spectral characterization of Super-Earth atmospheres for planets orbiting in the Habitable Zone of M-dwarf stars is a key focus in exoplanet science. A central challenge is to understand and predict the expected spectral signals of atmospheric biosignatures (species associated with life). Our work applies a global-mean radiative-convective-photochemical column model assuming a planet with an Earth-like biomass and planetary development. We investigated planets with gravities of 1g and 3g and a surface pressure of one bar around central stars with spectral classes from M0 to M7. The spectral signals of the calculated planetary scenarios have been presented by Rauer et al. (2011). The main motivation of the present work is to perform a deeper analysis of the chemical processes in the planetary atmospheres. We apply a diagnostic tool, the Pathway Analysis Program, to shed light on the photochemical pathways that form and destroy biosignature species. Ozone is a potential biosignature for complex- life. An important result of our analysis is a shift in the ozone photochemistry from mainly Chapman production (which dominates in the terrestrial stratosphere) to smog-dominated ozone production for planets in the Habitable Zone of cooler (M5-M7)-class dwarf stars. This result is associated with a lower energy flux in the UVB wavelength range from the central star, hence slower planetary atmospheric photolysis of molecular oxygen, which slows the Chapman ozone production. | |
| dc.language.iso | en | |
| dc.publisher | Mary Ann Liebert | |
| dc.title.en | Potential Biosignatures in Super-Earth Atmospheres II. Photochemical Responses | |
| dc.type | Article de revue | |
| dc.identifier.doi | 10.1089/ast.2012.0926 | |
| dc.subject.hal | Physique [physics]/Astrophysique [astro-ph]/Planétologie et astrophysique de la terre [astro-ph.EP] | |
| dc.subject.hal | Planète et Univers [physics]/Astrophysique [astro-ph]/Planétologie et astrophysique de la terre [astro-ph.EP] | |
| dc.identifier.arxiv | 1303.6804 | |
| bordeaux.journal | Astrobiology | |
| bordeaux.page | 415-438 | |
| bordeaux.volume | 13 | |
| bordeaux.peerReviewed | oui | |
| hal.identifier | hal-00832637 | |
| hal.version | 1 | |
| hal.popular | non | |
| hal.audience | Internationale | |
| hal.origin.link | https://hal.archives-ouvertes.fr//hal-00832637v1 | |
| bordeaux.COinS | ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Astrobiology&rft.date=2013&rft.volume=13&rft.spage=415-438&rft.epage=415-438&rft.eissn=1531-1074&rft.issn=1531-1074&rft.au=GRENFELL,%20J.%20L.&GEBAUER,%20S.&GODOLT,%20M.&PALCZYNSKI,%20K.&RAUER,%20H.&rft.genre=article |
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