Atmosphere modelling of terrestrial exoplanets

Details Atmosphere modelling of terrestrial exoplanets Atmosphere modelling of terrestrial exoplanets

Dec 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004sf2a.conf...87p&link_type=abstract

SF2A-2004: Semaine de l'Astrophysique Francaise, meeting held in Paris, France, June 14-18, 2004. Edited by F. Combes, D. Barret

Astronomy and Astrophysics

Astrophysics

Scientific paper

In this poster we explore the eventual spectral features due to methane (CH4), carbon dioxide (CO2), dioxygen (O2) and ozone (O3) in the reflection and emission spectra of Earth-like exoplanets. We especially focus on the detectability of these species at the low spectral resolutions expected for the future Darwin/TPF space observatories. This is done using the radiative transfer code PHOENIX in a spectral synthesis mode developed for this purpose. We used density, temperature and chemical profiles of the atmosphere measured in Earth's present atmosphere but also atmospheric models for terrestrial exoplanets and early Earth's atmosphere. We investigate the variability of the spectral features due to changes in density and abundance and the detection threshold for given resolutions. We also discuss the relevance of some of these spectral lines or bands as biomarkers.

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