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The entry geometry and velocity of planetary debris into the Roche sphere of a white dwarf
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Veras, Dimitri, Georgakarakos, Nikolaos, Mustill, Alexander J., Malamud, Uri, Cunningham, Tim and Dobbs-Dixon, Ian (2021) The entry geometry and velocity of planetary debris into the Roche sphere of a white dwarf. Monthly Notices of the Royal Astronomical Society, 506 (1). pp. 1148-1164. doi:10.1093/mnras/stab1667 ISSN 0035-8711.
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WRAP-entry-geometry-velocity-planetary-debris-Roche-white-dwarf-2021.pdf - Accepted Version - Requires a PDF viewer. Download (6Mb) | Preview |
Official URL: http://dx.doi.org/10.1093/mnras/stab1667
Abstract
Our knowledge of white dwarf planetary systems predominately arises from the region within a few Solar radii of the white dwarfs, where minor planets breakup, form rings and discs, and accrete on to the star. The entry location, angle and speed into this Roche sphere has rarely been explored but crucially determines the initial geometry of the debris, accretion rates on to the photosphere, and ultimately the composition of the minor planet. Here we evolve a total of over 105 asteroids with single-planet N-body simulations across the giant branch and white dwarf stellar evolution phases to quantify the geometry of asteroid injection into the white dwarf Roche sphere as a function of planetary mass and eccentricity. We find that lower planetary masses increase the extent of anisotropic injection and decrease the probability of head-on (normal to the Roche sphere) encounters. Our results suggest that one can use dynamical activity within the Roche sphere to make inferences about the hidden architectures of these planetary systems.
| Item Type: | Journal Article | ||||||||||||
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| Subjects: | Q Science > QB Astronomy | ||||||||||||
| Divisions: | Faculty of Science, Engineering and Medicine > Science > Physics | ||||||||||||
| Library of Congress Subject Headings (LCSH): | Kuiper Belt , Asteroids , Stars -- Evolution, White dwarf stars, Space debris, Interstellar matter | ||||||||||||
| Journal or Publication Title: | Monthly Notices of the Royal Astronomical Society | ||||||||||||
| Publisher: | Oxford University Press | ||||||||||||
| ISSN: | 0035-8711 | ||||||||||||
| Official Date: | September 2021 | ||||||||||||
| Dates: |
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| Volume: | 506 | ||||||||||||
| Number: | 1 | ||||||||||||
| Page Range: | pp. 1148-1164 | ||||||||||||
| DOI: | 10.1093/mnras/stab1667 | ||||||||||||
| 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 Dimitri Veras, Nikolaos Georgakarakos, Alexander J Mustill, Uri Malamud, Tim Cunningham, Ian Dobbs-Dixon, The entry geometry and velocity of planetary debris into the Roche sphere of a white dwarf, Monthly Notices of the Royal Astronomical Society, 2021;, stab1667, is available online at: https://doi.org/10.1093/mnras/stab1667 | ||||||||||||
| Access rights to Published version: | Restricted or Subscription Access | ||||||||||||
| Date of first compliant deposit: | 17 June 2021 | ||||||||||||
| Date of first compliant Open Access: | 18 June 2021 | ||||||||||||
| RIOXX Funder/Project Grant: |
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