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Embedding planetesimals into white dwarf discs from large distances
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Grishin, Evgeni and Veras, Dimitri (2019) Embedding planetesimals into white dwarf discs from large distances. Monthly Notices of the Royal Astronomical Society, 489 (1). pp. 168-175. doi:10.1093/mnras/stz2148 ISSN 1365-2966.
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WRAP-Embedding-planetesimals-discs-large-Veras-2019.pdf - Accepted Version - Requires a PDF viewer. Download (761Kb) | Preview |
Official URL: https://doi.org/10.1093/mnras/stz2148
Abstract
Abstract The discovery of the intact minor planet embedded in the debris disc orbiting SDSS J1228+1040 raises questions about the dynamical history of the system. Further, the recent passage of the potentially interstellar object 1I/’Oumuamua within the solar system has re-ignited interest in minor body flux through exoplanetary systems. Here, we utilize the new analytical formalism from Grishin, Perets & Avni (2019) to estimate the rate at which the gaseous components of typical white dwarf discs trap an exo-planetesimal. We compare the types of captured orbits which arise from planetesimals originating from the interstellar medium, exo-Kuiper belts and exo-Oort clouds. We find that the rate of interstellar medium injection is negligible, whereas capture of both exo-Kuiper and exo-Oort cloud planetesimals is viable, but strongly size-dependent. For a gaseous disc which extends much beyond its Roche limit, capture is more probable than disruption at the Roche limit. We find that the capture probability linearly increases with the radial extent of the disc. Even in systems without minor planets, capture of smaller bodies will change the disc size distribution and potentially its temporal variability. Our formalism is general enough to be applied to future discoveries of embedded planetesimals in white dwarf debris discs.
| Item Type: | Journal Article | |||||||||
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| Subjects: | Q Science > QB Astronomy | |||||||||
| Divisions: | Faculty of Science, Engineering and Medicine > Science > Physics | |||||||||
| SWORD Depositor: | Library Publications Router | |||||||||
| Library of Congress Subject Headings (LCSH): | Oort Cloud, Celestial mechanics, Asteroids, White dwarf stars | |||||||||
| Journal or Publication Title: | Monthly Notices of the Royal Astronomical Society | |||||||||
| Publisher: | Oxford University Press (OUP) | |||||||||
| ISSN: | 1365-2966 | |||||||||
| Official Date: | October 2019 | |||||||||
| Dates: |
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| Volume: | 489 | |||||||||
| Number: | 1 | |||||||||
| Page Range: | pp. 168-175 | |||||||||
| DOI: | 10.1093/mnras/stz2148 | |||||||||
| Status: | Peer Reviewed | |||||||||
| Publication Status: | Published | |||||||||
| Reuse Statement (publisher, data, author rights): | 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 Evgeni Grishin, Dimitri Veras, Embedding planetesimals into white dwarf discs from large distances, Monthly Notices of the Royal Astronomical Society, Volume 489, Issue 1, October 2019, Pages 168–175, is available online at: https://doi.org/10.1093/mnras/stz2148 | |||||||||
| Access rights to Published version: | Open Access (Creative Commons) | |||||||||
| Copyright Holders: | The Authors | |||||||||
| Date of first compliant deposit: | 28 August 2019 | |||||||||
| Date of first compliant Open Access: | 30 August 2019 | |||||||||
| RIOXX Funder/Project Grant: |
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