CRYSTALLINE SILICATES IN EVOLVED STARS. I.SPITZER/INFRARED SPECTROGRAPH SPECTROSCOPY OF IRAS 16456–3542, 18354–0638, AND 23239+5754

2013/01/14 by Biwei Jiang, B. W. Jiang, Ke Zhang +2
Physics and Astronomy · #Astro and Planetary Science #Astronomy #Astrophysics #Astrophysics and Star Formation Studies #Infrared #Infrared spectroscopy #Materials science #Physics #Spectral line #Spectrograph #Spectroscopy #Stars #Stellar, planetary, and galactic studies #astro-ph.SR

paper · pdf · doi:10.1088/0004-637x/765/1/72

21 pages, 6 figures, 4 tables, accepted by the Astrophyical Journal

arxiv created 2013/01/14 · openalex publication_date 2013/02/15 · arxiv updated 2015/06/12 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05

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.

Citations

• Crystalline Silicate Feature of the Vega-like Star HD 145263
• Spitzer Spectroscopy of Dusty Disks around B[e] Hypergiants in the Large Magellanic Cloud
• An evolutionary catalogue of galactic post-AGB and related objects
• The Magellanic Zoo: Mid‐InfraredSpitzerSpectroscopy of Evolved Stars and Circumstellar Dust in the Magellanic Clouds
• 8–13 μm Spectroscopy of Young Stellar Objects: Evolution of the Silicate Feature
• Evolution of interstellar dust and stardust in the solar neighbourhood