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Potential Biosignatures in Super-Earth Atmospheres. I. Spectral appearance of super-Earths around M dwarfs

hal.structure.identifierDLR Institute of Planetary Research
dc.contributor.authorRAUER, H.
dc.contributor.authorGEBAUER, S.
dc.contributor.authorPARIS, P. V.
hal.structure.identifierInstitut de Radioprotection et de Sûreté Nucléaire [IRSN]
dc.contributor.authorCABRERA, Justo
dc.contributor.authorGODOLT, M.
hal.structure.identifierZentrum für Astronomie und Astrophysik [Berlin] [ZAA]
dc.contributor.authorGRENFELL, J. L.
hal.structure.identifierLaboratoire d'astrodynamique, d'astrophysique et d'aéronomie de bordeaux [L3AB]
hal.structure.identifierLaboratoire d'Astrophysique de Bordeaux [Pessac] [LAB]
hal.structure.identifierObservatoire aquitain des sciences de l'univers [OASU]
hal.structure.identifierUniversité Sciences et Technologies - Bordeaux 1 [UB]
dc.contributor.authorBELU, A. R.
hal.structure.identifierLaboratoire d'astrodynamique, d'astrophysique et d'aéronomie de bordeaux [L3AB]
hal.structure.identifierLaboratoire d'Astrophysique de Bordeaux [Pessac] [LAB]
hal.structure.identifierObservatoire aquitain des sciences de l'univers [OASU]
hal.structure.identifierUniversité Sciences et Technologies - Bordeaux 1 [UB]
dc.contributor.authorSELSIS, Franck
hal.structure.identifierLaboratoire d'astrodynamique, d'astrophysique et d'aéronomie de bordeaux [L3AB]
hal.structure.identifierLaboratoire d'Astrophysique de Bordeaux [Pessac] [LAB]
hal.structure.identifierObservatoire aquitain des sciences de l'univers [OASU]
hal.structure.identifierUniversité Sciences et Technologies - Bordeaux 1 [UB]
dc.contributor.authorHEDELT, P.
dc.contributor.authorSCHREIER, F.
dc.date.created2011-02-15
dc.date.issued2011
dc.identifier.issn0004-6361
dc.description.abstractEnAtmospheric temperature and mixing ratio profiles of terrestrial planets vary with the spectral energy flux distribution for different types of M-dwarf stars and the planetary gravity. We investigate the resulting effects on the spectral appearance of molecular absorption bands, that are relevant as indicators for potential planetary habitability during primary and secondary eclipse for transiting terrestrial planets with Earth-like biomass emissions. Atmospheric profiles are computed using a plane-parallel, 1D climate model coupled with a chemistry model. We then calculate simulated spectra using a line-by-line radiative transfer model. We find that emission spectra during secondary eclipse show increasing absorption of methane, water and ozone for planets orbiting quiet M0-M3 dwarfs and the active M-type star AD Leo compared to solar type central stars. However, for planets orbiting very cool and quiet M dwarfs (M4 to M7), increasing temperatures in the mid-atmosphere lead to reduced absorption signals, making the detection of molecules more difficult in such scenarios. Transmission spectra during primary eclipse show strong absorption features of CH4, N2O and H2O for planets orbiting quiet M0-M7 stars and AD Leo. The N2O absorption of an Earth-sized planet orbiting a quiet M7 star can even be as strong as the CO2 signal. However, ozone absorption decreases for planets orbiting such cool central stars due to chemical effects in the atmosphere. To investigate the effect on the spectroscopic detection of absorption bands with potential future satellite missions, we compute signal-to-noise-ratios (SNR) for a James Webb Space Telescope (JWST)-like aperture telescope.
dc.language.isoen
dc.publisherEDP Sciences
dc.title.enPotential Biosignatures in Super-Earth Atmospheres. I. Spectral appearance of super-Earths around M dwarfs
dc.typeArticle de revue
dc.identifier.doi10.1051/0004-6361/201014368
dc.subject.halPhysique [physics]/Astrophysique [astro-ph]/Planétologie et astrophysique de la terre [astro-ph.EP]
dc.subject.halPlanète et Univers [physics]/Astrophysique [astro-ph]/Planétologie et astrophysique de la terre [astro-ph.EP]
dc.identifier.arxiv1102.0867
bordeaux.journalAstronomy and Astrophysics - A&A
bordeaux.pageA8
bordeaux.volume529
bordeaux.peerReviewedoui
hal.identifierhal-00570284
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-00570284v1
bordeaux.COinSctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Astronomy%20and%20Astrophysics%20-%20A&A&rft.date=2011&rft.volume=529&rft.spage=A8&rft.epage=A8&rft.eissn=0004-6361&rft.issn=0004-6361&rft.au=RAUER,%20H.&GEBAUER,%20S.&PARIS,%20P.%20V.&CABRERA,%20Justo&GODOLT,%20M.&rft.genre=article


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