Please use this identifier to cite or link to this item: http://hdl.handle.net/2381/32047
Title: Positive metallicity correlation for coreless giant planets
Authors: Nayakshin, Sergei
First Published: 4-Jan-2015
Publisher: Oxford University Press on behalf of the Royal Astronomical Society
Citation: Monthly Notices of the Royal Astronomical Society Letters, 2015, 448 (1), L25-L29
Abstract: 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.
DOI Link: 10.1093/mnrasl/slu191
ISSN: 0035-8711
eISSN: 1365-2966
Links: http://mnrasl.oxfordjournals.org/content/448/1/L25.abstract
http://hdl.handle.net/2381/32047
Version: Publisher Version
Status: Peer-reviewed
Type: Journal Article
Rights: Copyright © 2015, The Authors. Published by Oxford University Press on behalf of the Royal Astronomical Society. Deposited with reference to the publisher’s archiving policy available on the SHERPA/RoMEO website.
Description: 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.
Appears in Collections:Published Articles, Dept. of Physics and Astronomy

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