Johnston, H.F., Panić, O. orcid.org/0000-0002-6648-2968 and Liu, B. (2023) Formation of giant planets around intermediate-mass stars. Monthly Notices of the Royal Astronomical Society, 527 (2). pp. 2303-2322. ISSN 0035-8711
Abstract
To understand giant planet formation, we need to focus on host stars close to , where the occurrence rate of these planets is the highest. In this initial study, we carry out pebble-driven core accretion planet formation modelling to investigate the trends and optimal conditions for the formation of giant planets around host stars in the range of . We find that giant planets are more likely to form in systems with a larger initial disc radius; higher disc gas accretion rate; pebbles of ∼millimeter in size; and birth location of the embryo at a moderate radial distance of ∼10 au. We also conduct a population synthesis study of our model and find that the frequency of giant planets and super-Earths decreases with increasing stellar mass. This contrasts the observational peak at , stressing the need for strong assumptions on stellar mass dependencies in this range. Investigating the combined effect of stellar mass dependent disc masses, sizes, and lifetimes in the context of planet population synthesis studies is a promising avenue to alleviate this discrepancy. The hot-Jupiter occurrence rate in our models is around – similar to RV observations around Sun-like stars, but drastically decreases for higher mass stars.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © The Author(s) 2023. This is an open access article under the terms of the Creative Commons Attribution License (CC-BY 4.0), which permits unrestricted use, distribution and reproduction in any medium, provided the original work is properly cited. |
Keywords: | methods: numerical, planets and satellites: formation, stars: planetary systems |
Dates: |
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Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Engineering & Physical Sciences (Leeds) > School of Physics and Astronomy (Leeds) > Astrophysics (Leeds) |
Funding Information: | Funder Grant number STFC (Science and Technology Facilities Council) ST/T000287/1 STFC (Science and Technology Facilities Council) ST/W007037/1 |
Depositing User: | Symplectic Publications |
Date Deposited: | 04 Jan 2024 11:28 |
Last Modified: | 04 Jan 2024 11:28 |
Status: | Published |
Publisher: | Oxford University Press |
Identification Number: | 10.1093/mnras/stad3254 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:207151 |