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How fast do Jupiters grow? Signatures of the snowline and growth rate in the distribution of gas giant planets

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Original languageEnglish
Pages (from-to)756-762
Number of pages7
JournalMonthly Notices of the Royal Astronomical Society
Volume428
Issue number1
DOIs
Publication statusPublished - 1 Jan 2013

Abstract

We present here observational evidence that the snowline plays a significant role in the formation and evolution of gas giant planets. When considering the population of observed exoplanets, we find a boundary in mass-semimajor axis space that suggests that planets are preferentially found beyond the snowline prior to undergoing gap-opening inward migration and associated gas accretion. This is consistent with theoretical models suggesting that sudden changes in opacity – as would occur at the snowline – can influence core migration. Furthermore, population synthesis modelling suggests that this boundary implies that gas giant planets accrete ∼70 per cent of the inward flowing gas, allowing ∼30 per cent through to the inner disc. This is qualitatively consistent with observations of transition discs suggesting the presence of inner holes, despite there being ongoing gas accretion.

ID: 5480663