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Reinforcement of the link between stellar metallicity and the zero age orbit of gas giant planet

Published online by Cambridge University Press:  04 September 2018

Rafael Pinotti ,
Heloisa M. Boechat-Roberty  and
Gustavo F. Porto de Mello
Rafael Pinotti
Affiliation:
Observatorio do Valongo, Universidade Federal do Rio de Janeiro, Ladeira Pedro Antonio 43, 20080-090, Rio de Janeiro, Brazil email: rpinotti@astro.ufrj.br
Heloisa M. Boechat-Roberty
Affiliation:
Observatorio do Valongo, Universidade Federal do Rio de Janeiro, Ladeira Pedro Antonio 43, 20080-090, Rio de Janeiro, Brazil email: rpinotti@astro.ufrj.br
Gustavo F. Porto de Mello
Affiliation:
Observatorio do Valongo, Universidade Federal do Rio de Janeiro, Ladeira Pedro Antonio 43, 20080-090, Rio de Janeiro, Brazil email: rpinotti@astro.ufrj.br
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Abstract

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In 2005 we suggested a relation between the optimal locus of gas giant planet formation, prior to migration, and the metallicity of the host star, based on the core accretion model, and radial profiles of dust surface density and gas temperature. At that time, less than 200 extrasolar planets were known, limiting the scope of our analysis. Here, we take into account the expanded statistics allowed by new discoveries, in order to check the validity of some premises. We compare predictions with the present available data and results for different stellar mass ranges. We find that the zero age planetary orbit (ZAPO) hypothesis continues to hold after a two order of magnitude increase in discovered planets, as well as the prediction that planets around metal poor stars would have shorter orbits.

Keywords

planetary systemsgaseous planetsformation - planets and satellites
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 13 , Symposium S332: Astrochemistry VII: Through the Cosmos from Galaxies to Planets , March 2017 , pp. 109 - 112
Copyright
Copyright © International Astronomical Union 2018 

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