Published March 1, 2013
| Published
Journal Article
Open
Crystalline Silicates in Evolved Stars. I. Spitzer/Infrared Spectrograph Spectroscopy of IRAS 16456–3542, 18354–0638, and 23239+5754
- Creators
- Jiang, B. W.
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Zhang, Ke
- Li, Aigen
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Lisse, C. M.
Chicago
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Abstract
We report the Spitzer Infrared Spectrograph (IRS) observations of three evolved stars: IRAS 16456–3542, 18354–0638, and 23239+5754. The 9.9-37.2 μm Spitzer/IRS high-resolution spectra of these three sources exhibit rich sets of enstatite-dominated crystalline silicate emission features. IRAS 16456–3542 is extremely rich in crystalline silicates, with >90% of its silicate mass in crystalline form, the highest to date ever reported for crystalline silicate sources.
Additional Information
© 2013 The American Astronomical Society. Received 2012 February 1; accepted 2013 January 11; published 2013 February 15. We thank the anonymous referee for his/her very constructive comments and suggestions which substantially improved the quality of this paper. We thank B. A. Sargent and R. Szczerba for helpful discussion. We thank C. A. Beichman, C.Kemper, and F. Molster for providing the IR spectra of HD 69830, HD 100546, comet Hale–Bopp, and the Galactic center source Sgr A∗. This project is supported through a NASA Spitzer GO grant, and in part by China's grants NSFC 10973004 and 11173007 and by NSF/AST 1109039.Attached Files
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Additional details
- Eprint ID
- 37607
- Resolver ID
- CaltechAUTHORS:20130325-091511111
- NASA
- National Natural Science Foundation of China
- 10973004
- National Natural Science Foundation of China
- 11173007
- NSF
- AST-1109039
- Created
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2013-04-15Created from EPrint's datestamp field
- Updated
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2021-11-09Created from EPrint's last_modified field