Kemper, F;
Sylvester, RJ;
Barlow, MJ;
Waters, LBFM;
de Jong, T;
Molster, FJ;
Tielens, AGGM;
(2000)
Silicates as probes of the mass loss history of oxygen-rich evolved stars.
In: Sitko, ML and Sprague, AL and Lynch, DK, (eds.)
Proceedings of the Thermal Emission Spectroscopy and Analysis of Dust, Disks, and Regoliths.
(pp. pp. 15-22).
Astronomical Society of the Pacific
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Abstract
Combined LWS and SWS observations (2.4 - 197 μm), obtained with the Infrared Space Observatory (ISO), provide a good coverage of the spectral energy distribution (SED) of the circumstellar dust shells of oxygen-rich evolved stars. The spectra of our sample of oxygen-rich stars with mass loss rates ranging from 10-7 - 10-4 Modot yr-1 exhibit a wealth of crystalline and amorphous silicate features. For increasing mass loss rates, we find that the crystalline silicate features become more pronounced. In two objects we find the presence of crystalline silicates in emission and amorphous silicates in absorption at the same wavelength, indicating a difference in spatial distribution of the two species; spherically symmetric and an axi-symmetric geometries are examined.
| Type: | Proceedings paper |
|---|---|
| Title: | Silicates as probes of the mass loss history of oxygen-rich evolved stars |
| Event: | Meeting on Thermal Emission Spectroscopy and Analysis of Dust, Disks, and Regoliths |
| Location: | LUNAR & PLANETARY INST, HOUSTON, TX |
| Dates: | 28 April 1999 - 30 April 1999 |
| ISBN: | 1-58381-023-4 |
| Open access status: | An open access version is available from UCL Discovery |
| Publisher version: | http://www.aspbooks.org/a/volumes/article_details/... |
| 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: | Science & Technology, Physical Sciences, Astronomy & Astrophysics, PUMPING LINES, DUST SHELLS, MINERALOGY |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices 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/10096056 |
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