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Planet migration in self-gravitating discs : survival of planets
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Rowther, Sahl and Meru, Farzana (2020) Planet migration in self-gravitating discs : survival of planets. Monthly Notices of the Royal Astronomical Society, 496 (2). pp. 1598-1609. doi:10.1093/mnras/staa1590
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Official URL: https://doi.org/10.1093/mnras/staa1590
Abstract
We carry out three-dimensional SPH simulations to study whether planets can survive in self-gravitating protoplanetary discs. The discs modelled here use a cooling prescription that mimics a real disc which is only gravitationally unstable in the outer regions. We do this by modelling the cooling using a simplified method such that the cooling time in the outer parts of the disc is shorter than in the inner regions, as expected in real discs. We find that both giant (>MSat) and low mass (<MNep) planets initially migrate inwards very rapidly, but are able to slow down in the inner gravitationally stable regions of the disc without needing to open up a gap. This is in contrast to previous studies where the cooling was modelled in a more simplified manner where regardless of mass, the planets were unable to slow down their inward migration. This shows the important effect the thermodynamics has on planet migration. In a broader context, these results show that planets that form in the early stages of the discs’ evolution, when they are still quite massive and self-gravitating, can survive.
| Item Type: | Journal Article | |||||||||
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| Subjects: | Q Science > QB Astronomy | |||||||||
| Divisions: | Faculty of Science > Physics | |||||||||
| SWORD Depositor: | Library Publications Router | |||||||||
| Library of Congress Subject Headings (LCSH): | Extrasolar planets, Astronomy, Astrophysics, Hydrodynamics, Planets | |||||||||
| Journal or Publication Title: | Monthly Notices of the Royal Astronomical Society | |||||||||
| Publisher: | Oxford University Press | |||||||||
| ISSN: | 1745-3933 | |||||||||
| Official Date: | August 2020 | |||||||||
| Dates: |
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| Date of first compliant deposit: | 8 July 2020 | |||||||||
| Volume: | 496 | |||||||||
| Number: | 2 | |||||||||
| Page Range: | pp. 1598-1609 | |||||||||
| DOI: | 10.1093/mnras/staa1590 | |||||||||
| Status: | Peer Reviewed | |||||||||
| Publication Status: | Published | |||||||||
| Publisher Statement: | This is a pre-copyedited, author-produced version of an article accepted for publication in Monthly Notices of the Royal Astronomical Society following peer review. The version of record Sahl Rowther, Farzana Meru, Planet migration in self-gravitating discs: survival of planets, Monthly Notices of the Royal Astronomical Society, Volume 496, Issue 2, August 2020, Pages 1598–1609, is available online at: https://doi.org/10.1093/mnras/staa1590 | |||||||||
| Access rights to Published version: | Restricted or Subscription Access | |||||||||
| RIOXX Funder/Project Grant: |
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