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A Tidally Disrupted Asteroid around the White Dwarf G29-38
Open accessAbstract
The infrared excess around the white dwarf G29-38 can be explained by emission from an opaque flat ring of dust with an inner radius of 0.14 R ☉ and an outer radius of less than 1 R ☉ . This ring lies within the Roche region of the white dwarf where an asteroid could have been tidally destroyed, producing a system reminiscent of Saturn's rings. Accretion onto the white dwarf from this circumstellar dust can explain the observed calcium abundance in the atmosphere of G29-38. Either as a bombardment by a series of asteroids or because of one large disruption, the total amount of matter accreted onto the white dwarf may have been ~4 × 10 24 g, comparable to the total mass of asteroids in the solar system, or, equivalently, about 1% of the mass in the asteroid belt around the main-sequence star ζ Lep.
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Metadata
- Authors
- Jura, M.
- Venue
- The Astrophysical Journal
- Publisher
- American Astronomical Society
- Published
- 2003-02-20
- Volume
- 584
- Issue
- 2
- Pages
- L91-L94
- ISSN
- 0004-637X (ISSN-L)
- 1538-4357
- OpenAlex
- W2028678583
- Cited by
- 602
- References
- 0
- FWCI
- 4.25
- Type
- journal article
- Language
- en
- Open access
- bronze
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- Jura, M. (2003). A Tidally Disrupted Asteroid around the White Dwarf G29-38. The Astrophysical Journal. https://doi.org/10.1086/374036
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