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ATMOSPHERIX: II- Characterising exoplanet atmospheres through transmission spectroscopy with SPIRou

dc.contributor.authorDEBRAS, F.
dc.contributor.authorKLEIN, B.
dc.contributor.authorDONATI, J. -F.
dc.contributor.authorHOOD, T.
dc.contributor.authorMOUTOU, C.
dc.contributor.authorCARMONA, A.
dc.contributor.authorCHARNAY, B.
dc.contributor.authorBÉZARD, B.
dc.contributor.authorFOUQUÉ, P.
dc.contributor.authorMASSON, A.
dc.contributor.authorVINATIER, S.
dc.contributor.authorBARUTEAU, C.
dc.contributor.authorBOISSE, I.
dc.contributor.authorBONFILS, X.
dc.contributor.authorCHIAVASSA, A.
dc.contributor.authorDELFOSSE, X.
dc.contributor.authorHEBRARD, G.
dc.contributor.authorLECONTE, J.
dc.contributor.authorMARTIOLI, E.
dc.contributor.authorOULD-ELKHIM, M.
dc.contributor.authorPARMENTIER, V.
dc.contributor.authorPETIT, P.
dc.contributor.authorPLURIEL, W.
dc.contributor.authorSELSIS, F.
dc.contributor.authorTEINTURIER, L.
dc.contributor.authorTREMBLIN, P.
hal.structure.identifierLaboratoire de Météorologie Dynamique (UMR 8539) [LMD]
hal.structure.identifierInstitut Pierre-Simon-Laplace [IPSL (FR_636)]
hal.structure.identifierLaboratoire d'Astrophysique de Bordeaux [Pessac] [LAB]
dc.contributor.authorTURBET, M.
hal.structure.identifierLaboratoire Interuniversitaire des Systèmes Atmosphériques [LISA (UMR_7583)]
dc.contributor.authorVENOT, O.
dc.date.issued2023
dc.description.abstractEnIn a companion paper, we introduced a publicly-available pipeline to characterise exoplanet atmospheres through high-resolution spectroscopy. In this paper, we use this pipeline to study the biases and degeneracies that arise in atmospheric characterisation of exoplanets in near-infrared ground-based transmission spectroscopy. We inject synthetic planetary transits into sequences of SPIRou spectra of the well known M dwarf star Gl 15 A, and study the effects of different assumptions on the retrieval. We focus on (i) mass and radius uncertainties, (ii) non isothermal vertical profiles and (iii) identification and retrieval of multiple species. We show that the uncertainties on mass and radius should be accounted for in retrievals and that depth-dependent temperature information can be derived from high-resolution transmission spectroscopy data. Finally, we discuss the impact of selecting wavelength orders in the retrieval and the issues that arise when trying to identify a single species in a multi-species atmospheric model. This analysis allows us to understand better the results obtained through transmission spectroscopy and their limitations in preparation to the analysis of actual SPIRou data.
dc.language.isoen
dc.subject.enEarth and Planetary Astrophysics (astro-ph.EP)
dc.subject.enInstrumentation and Methods for Astrophysics (astro-ph.IM)
dc.subject.enFOS: Physical sciences
dc.title.enATMOSPHERIX: II- Characterising exoplanet atmospheres through transmission spectroscopy with SPIRou
dc.typeDocument de travail - Pré-publication
dc.identifier.doi10.48550/arXiv.2308.14511
dc.subject.halPlanète et Univers [physics]
hal.identifierhal-04263317
hal.version1
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-04263317v1
bordeaux.COinSctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.date=2023&rft.au=DEBRAS,%20F.&KLEIN,%20B.&DONATI,%20J.%20-F.&HOOD,%20T.&MOUTOU,%20C.&rft.genre=preprint


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