Grain opacity and the bulk composition of extrasolar planets

Author: Mordasini C.   Klahr H.   Alibert Y.   Miller N.   Henning T.  

Publisher: Edp Sciences

E-ISSN: 1432-0746|566|issue|A141-A141

ISSN: 0004-6361

Source: Astronomy & Astrophysics, Vol.566, Iss.issue, 2014-06, pp. : A141-A141

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Abstract

Context. The opacity due to grains in the envelope of a protoplanet κgr regulates the accretion rate of gas during formation, meaning that the final bulk composition of planets with a primordial H/He envelope is a function of that opacity. Observationally, for extrasolar planets with known mass and radius it is possible to estimate the bulk composition via internal structure models.