Jura, M;
Farihi, J;
Zuckerman, B;
(2009)
Six white dwarfs with circumstellar silicates.
Astronomical Journal
, 137
(2)
pp. 3191-3197.
10.1088/0004-6256/137/2/3191.
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Abstract
Spitzer Space Telescope spectra reveal 10 μm silicate emission from circumstellar dust orbiting six externally polluted white dwarfs. Micron-size glasses with an olivine stoichiometry can account for the distinctively broad wings that extend to 12 μm; these particles likely are produced by tidal disruption of asteroids. The absence of infrared polycyclic aromatic hydrocarbon features is consistent with a scenario where extrasolar rocky planets are assembled from carbon-poor solids.
| Type: | Article |
|---|---|
| Title: | Six white dwarfs with circumstellar silicates |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1088/0004-6256/137/2/3191 |
| Publisher version: | http://dx.doi.org/10.1088/0004-6256/137/2/3191 |
| Language: | English |
| Additional information: | Copyright © 2009. The American Astronomical Society. All rights reserved. |
| Keywords: | minor planets, asteroids; planetary systems; 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/1477424 |
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