Spectroscopic Characterization of Exoplanets

Mathematics – Logic

Scientific paper

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Scientific paper

Infrared spectroscopy is especially suited for attempting to characterize exoplanets, because (1) this is the spectral range where the planet/star flux contrast is most favorable and (2) numerous spectral signatures of neutral molecules are found in the IR range. In the case of Earth-like exoplanets, the reflected stellar component will be useful for styding their atmospheric composition and their surface mineralogy. Mineralogic characterization includes the search for silicates, oxides, sulfates and carbonates. The thermal component will provide insights on the vertical thermal structure of the atmosphere, the cloud structure and the vertical distribution of atmospheric constituents. Typical synthetic spectra of exoplanets will be presented as a function of (1) the stellar type, (2) the asterocentric distance and (3) the atmospheric composition. Constraints will be derived on the spectral resolving power required for the identification of atmospheric and mineralogic species by future remote sensing space experiments.

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