SKINNER, CJ;
BARLOW, MJ;
JUSTTANONT, K;
(1992)
Silicate dust in a Vega-excess system.
Monthly Notices of the Royal Astronomical Society
, 255
(3)
P31-P36.
10.1093/mnras/255.1.31P.
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Abstract
The 10-µm spectrum of the K5V star SAO 179815 ( = HD 98800) is presented, and conclusively demonstrates the presence of small silicate dust grains (probably in a disc) around this star. The 9.7-µm silicate dust feature is unusually broad and shallow in this system. This, together with the slow fall-off of flux at longer wavelengths, constrains the size and density distributions of dust grains in models of the disc. We find that there must be a significant population of small grains (radii at least as small as 0.01 µm), as well as a population of large grains (radii at least as large as 100 µm) in order to explain all the observed properties of the disc.
| Type: | Article |
|---|---|
| Title: | Silicate dust in a Vega-excess system |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1093/mnras/255.1.31P |
| Publisher version: | https://doi.org/10.1093/mnras/255.1.31P |
| Language: | English |
| Additional information: | This version is the version of record. For information on re-use, please refer to the publisher’s terms and conditions. |
| Keywords: | circumstellar matter, stars: individual: SAO 179815, dust, extinction, infrared: stars |
| 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/10096203 |
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