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

  • Rafael Pinotti (a1), Heloisa M. Boechat-Roberty (a1) and Gustavo F. Porto de Mello (a1)

Abstract

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.

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

  • Rafael Pinotti (a1), Heloisa M. Boechat-Roberty (a1) and Gustavo F. Porto de Mello (a1)

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