Spectral response of Earth-like planets to orbital variations

P. Hedelt (1) , M. Godolt , J. L. Grenfell (2) , P. von Paris (1) , H. Rauer , F. Schreier , Franck Selsis (1) , T. Trautmann (3)

1 sSE 2011
2 ZAA - Zentrum für Astronomie und Astrophysik [Berlin]
3 IMF - DLR Institut für Methodik der Fernerkundung / DLR Remote Sensing Technology Institute

We present the spectral appearance of Earth-like exoplanets in the habitable zone of different main sequence (F, K and G-type) stars and their spectral response to small orbital distance variations. Using atmospheric profiles from a 1D atmosphere model, we compute transmission and emission spectra in the infrared using a cloud-free line-by-line radiative transfermodel. The orbital distanceswere chosen such that surface temperatures in the atmosphericmodel are in the range of 273K (outer run) to 303K (inner run). The spectra are then analyzed in light of current and future space telescopes like the JamesWebb Telescope (JWST), Spitzer and the ground based European Extremely Large Telescope (E-ELT) in order to discuss the measurability of certain spectral features.

Domaines: Planétologie et astrophysique de la terre [astro-ph.EP]; Planétologie et astrophysique de la terre [astro-ph.EP]

P. Hedelt, M. Godolt, J. L. Grenfell, P. von Paris, H. Rauer, et al.. Spectral response of Earth-like planets to orbital variations. EPSC-DPS Joint Meeting 2011, held 2-7 October 2011 in Nantes, France. p.729, 2011, 2011, Nantes, France. pp.729. ⟨hal-00666789⟩