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Positive metallicity correlation for coreless giant planets

journal contribution
posted on 23.04.2015, 14:49 by Sergei Nayakshin
Frequency of detected giant planets is observed to increase rapidly with metallicity of the host star. This is usually interpreted as evidence in support of the Core Accretion (CA) theory, which assembles giant planets as a result of formation of a massive solid core. A strong positive planet-metallicity correlation for giant planets formed in the framework of Gravitational disc Instability (GI) model is found here. The key novelty of this work is "pebble accretion" onto GI fragments which has been recently demonstrated to accelerate contraction of GI fragments. Driven closer to the star by the inward migration, only the fragments that accrete metals rapidly enough collapse and survive the otherwise imminent tidal disruption. The survival fraction of simulated planets correlates strongly with the metallicity of the host star, as observed.

History

Citation

Monthly Notices of the Royal Astronomical Society Letters, 2015, 448 (1), L25-L29

Author affiliation

/Organisation/COLLEGE OF SCIENCE AND ENGINEERING/Department of Physics and Astronomy

Version

VoR (Version of Record)

Published in

Monthly Notices of the Royal Astronomical Society Letters

Publisher

Oxford University Press on behalf of the Royal Astronomical Society

issn

0035-8711

eissn

1365-2966

Copyright date

2015

Available date

23/04/2015

Publisher version

http://mnrasl.oxfordjournals.org/content/448/1/L25.abstract

Notes

This article has been accepted for publication in Monthly Notices of the Royal Astronomical Society Letters ©: 2015 The Authors. Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved.

Language

en

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