Becklin, EE;
Farihi, J;
Jura, M;
Song, I;
Weinberger, AJ;
Zuckerman, B;
(2005)
A Dusty Disk around GD 362, a White Dwarf with a Uniquely High Photospheric Metal Abundance.
The Astrophysical Journal Letters
, 632
(2)
L119-L122.
10.1086/497826.
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Abstract
Eighteen years after an infrared excess was discovered associated with the white dwarf G29-38, we report ground-based measurements (JHKsKL'N') with millijansky-level sensitivity of GD 362 that show it to be a second single white dwarf with an infrared excess. As a first approximation, the excess around GD 362, which amounts to ~3% of the total stellar luminosity, can be explained by emission from a passive, flat, opaque dust disk that lies within the Roche radius of the white dwarf. The dust may have been produced by the tidal disruption of a large parent body such as an asteroid. Accretion from this circumstellar disk could account for the remarkably high abundance of metals in the star's photosphere.
| Type: | Article |
|---|---|
| Title: | A Dusty Disk around GD 362, a White Dwarf with a Uniquely High Photospheric Metal Abundance |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1086/497826 |
| Publisher version: | http://dx.doi.org/10.1086/497826 |
| Language: | English |
| Additional information: | Copyright © 2005. The American Astronomical Society. |
| Keywords: | circumstellar matter; minor planets, asteroids; white dwarfs |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Physics and Astronomy |
| URI: | https://discovery.ucl.ac.uk/id/eprint/1477413 |
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