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Crystalline Silicates in Evolved Stars. I. Spitzer/Infrared Spectrograph Spectroscopy of IRAS 16456–3542, 18354–0638, and 23239+5754

Jiang, B. W. and Zhang, Ke and Li, Aigen and Lisse, C. M. (2013) Crystalline Silicates in Evolved Stars. I. Spitzer/Infrared Spectrograph Spectroscopy of IRAS 16456–3542, 18354–0638, and 23239+5754. Astrophysical Journal, 765 (1). Art. No. 72. ISSN 0004-637X. doi:10.1088/0004-637X/765/1/72. https://resolver.caltech.edu/CaltechAUTHORS:20130325-091511111

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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.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1088/0004-637X/765/1/72DOIArticle
http://iopscience.iop.org/0004-637X/765/1/72/PublisherArticle
ORCID:
AuthorORCID
Zhang, Ke0000-0002-0661-7517
Lisse, C. M.0000-0002-9548-1526
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.
Funders:
Funding AgencyGrant Number
NASAUNSPECIFIED
National Natural Science Foundation of China10973004
National Natural Science Foundation of China11173007
NSFAST-1109039
Subject Keywords:circumstellar matter; infrared: stars; stars: AGB and post-AGB
Issue or Number:1
DOI:10.1088/0004-637X/765/1/72
Record Number:CaltechAUTHORS:20130325-091511111
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20130325-091511111
Official Citation:Crystalline Silicates in Evolved Stars. I. Spitzer/Infrared Spectrograph Spectroscopy of IRAS 16456–3542, 18354–0638, and 23239+5754 B. W. Jiang et al. 2013 ApJ 765 72
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:37607
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:15 Apr 2013 19:30
Last Modified:09 Nov 2021 23:30

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