Characterizing Habitable Extrasolar Planets using Spectral Fingerprints

Details Characterizing Habitable Extrasolar Planets using Spectral Fingerprints Characterizing Habitable Extrasolar Planets using Spectral Fingerprints

2009-06-01

arxiv.org/abs/0906.0361v1

Astronomy and Astrophysics

Astrophysics

Earth and Planetary Astrophysics

14pg, 4 figures, Accepted CRAS (Proceedings of the National Academy of Science France), Palevol series

Scientific paper

The detection and characterization of Earth-like planet is approaching rapidly thanks to radial velocity surveys (HARPS), transit searches (Corot, Kepler) and space observatories dedicated to their characterization are already in development phase (James Webb Space Telescope), large ground based telescopes (ELT, TNT, GMT), and dedicated space-based missions like Darwin, Terrestrial Planet Finder, New World Observer). In this paper we discuss how we can read a planets spectrum to assess its habitability and search for the signatures of a biosphere. Identifying signs of life implies understanding how the observed atmosphere physically and chemically works and thus to gather information on the planet in addition to the observing its spectral fingerprint.

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