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VUV-absorption cross section of carbon dioxide from 150 to 800 K and applications to warm exoplanetary atmospheres⋆

Author： Venot O. Bénilan Y. Fray N. Gazeau M.-C. Lefèvre F. Es-sebbar Et. Hébrard E. Schwell M. Bahrini C. Montmessin F. Lefèvre M. Waldmann I. P.

Publisher： Edp Sciences

E-ISSN： 1432-0746|609|issue|A34-A34

ISSN： 0004-6361

Source： Astronomy & Astrophysics, Vol.609, Iss.issue, 2018-01, pp. : A34-A34

Disclaimer: Any content in publications that violate the sovereignty, the constitution or regulations of the PRC is not accepted or approved by CNPIEC.

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Abstract

Context. Most exoplanets detected so far have atmospheric temperatures significantly higher than 300 K. Often close to their star, they receive an intense UV photons flux that triggers important photodissociation processes. The temperature dependency of vacuum ultraviolet (VUV) absorption cross sections are poorly known, leading to an undefined uncertainty in atmospheric models. Similarly, data measured at low temperatures similar to those of the high atmosphere of Mars, Venus, and Titan are often lacking.

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