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Formation of eccentric gas discs from sublimating or partially disrupted asteroids orbiting white dwarfs
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Trevascus, David, Price, Daniel J., Nealon, Rebecca, Liptai, David, Manser, Christopher J. and Veras, Dimitri (2021) Formation of eccentric gas discs from sublimating or partially disrupted asteroids orbiting white dwarfs. Monthly Notices of the Royal Astronomical Society: Letters, 505 (1). L21-L25. doi:10.1093/mnrasl/slab043 ISSN 1745-3933.
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Official URL: https://doi.org/10.1093/mnrasl/slab043
Abstract
Of the 21 known gaseous debris discs around white dwarfs, a large fraction of them display observational features that are well described by an eccentric distribution of gas. In the absence of embedded objects or additional forces, these discs should not remain eccentric for long time-scales, and should instead circularize due to viscous spreading. The metal pollution and infrared excess we observe from these stars is consistent with the presence of tidally disrupted sub-stellar bodies. We demonstrate, using smoothed particle hydrodynamics, that a sublimating or partially disrupting planet on an eccentric orbit around a white dwarf will form and maintain a gas disc with an eccentricity within 0.1 of, and lower than, that of the orbiting body. We also demonstrate that the eccentric gas disc observed around the white dwarf SDSS J1228 + 1040 can be explained by the same hypothesis.
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): | White dwarf stars, Space debris, Asteroids, Interstellar matter | ||||||||||||||||||
Journal or Publication Title: | Monthly Notices of the Royal Astronomical Society: Letters | ||||||||||||||||||
Publisher: | Oxford University Press (OUP) | ||||||||||||||||||
ISSN: | 1745-3933 | ||||||||||||||||||
Official Date: | July 2021 | ||||||||||||||||||
Dates: |
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Volume: | 505 | ||||||||||||||||||
Number: | 1 | ||||||||||||||||||
Page Range: | L21-L25 | ||||||||||||||||||
DOI: | 10.1093/mnrasl/slab043 | ||||||||||||||||||
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: Letters following peer review. The version of record David Trevascus, Daniel J Price, Rebecca Nealon, David Liptai, Christopher J Manser, Dimitri Veras, Formation of eccentric gas discs from sublimating or partially disrupted asteroids orbiting white dwarfs, Monthly Notices of the Royal Astronomical Society: Letters, Volume 505, Issue 1, July 2021, Pages L21–L25 is available online at: https://doi.org/10.1093/mnrasl/slab043 | ||||||||||||||||||
Access rights to Published version: | Restricted or Subscription Access | ||||||||||||||||||
Date of first compliant deposit: | 19 November 2021 | ||||||||||||||||||
Date of first compliant Open Access: | 22 November 2021 | ||||||||||||||||||
RIOXX Funder/Project Grant: |
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