A systematic search for the spectra with features of crystalline silicates in the Spitzer IRS Enhanced Products

Abstract

The crystalline silicates features are mainly reflected in infrared bands. The Spitzer Infrared Spectrograph (IRS) collected numerous spectra of various objects and provided a big database to investigate crystalline silicates in a wide range of astronomical environments. We apply the manifold ranking algorithm to perform a systematic search for the spectra with crystalline silicates features in the Spitzer IRS Enhanced Products available. In total, 868 spectra of 790 sources are found to show the features of crystalline silicate. These objects are cross-matched with the SIMBAD database as well as with the Large Sky Area Multi-Object Fibre Spectroscopic Telescope (LAMOST)/DR2. The average spectrum of young stellar objects show a variety of features dominated either by forsterite or enstatite or neither, while the average spectrum of evolved objects consistently present dominant features of forsterite in AGB, OH/IR, post-AGB and planetary nebulae. They are identified optically as early-type stars, evolved stars, galaxies and so on. In addition, the strength of spectral features in typical silicate complexes is calculated. The results are available through CDS for the astronomical community to further study crystalline silicate.

arXiv comment32 pages, 9 figures, Accepted by AJ

References in corpus (14)

• The Spitzer Space Telescope Mission
• The Infrared Spectrograph on the Spitzer Space Telescope
• The formation and evolution of planetary systems: Grain growth and chemical processing of dust in T Tauri systems
• Crystalline silicate dust around evolved stars II. The crystalline silicate complexes
• Dust evolution in protoplanetary disks around Herbig Ae/Be stars - The Spitzer view
• Crystalline silicates and dust processing in the protoplanetary disks of the Taurus young cluster
• Crystalline silicate dust around evolved stars III. A correlations study of crystalline silicate features
• Crystalline silicate dust around evolved stars I. The sample stars
• The Detection of Crystalline Silicates in Ultra-Luminous Infrared Galaxies
• On the metallicity dependence of crystalline silicates in oxygen-rich asymptotic giant branch stars and red supergiants
• Dust in the wind: Crystalline silicates, corundum and periclase in PG 2112+059
• Crystalline Silicates in Evolved Stars. I. Spitzer/IRS Spectroscopy of IRAS16456-3542, 18354-0638, and 23239+5754
• Interstellar Silicate Dust in the z=0.89 Absorber Towards PKS 1830-211: Crystalline Silicates at High Redshift?
• A Tale of Three Galaxies: Anomalous Dust Properties in IRASF10398+1455, IRASF21013-0739 and SDSSJ0808+3948

Cited by in corpus (5)

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• Infrared Spectra of Pyroxenes (Crystalline Chain Silicates) at Room Temperature
• Probing the 9.7μm Interstellar Silicate Extinction Profile through the Spitzer/IRS Spectroscopy of OB Stars
• Properties of luminous red supergiant stars in the Magellanic Clouds
• Dippers from TESS Full-frame Images. II. Spectroscopic Characterization of Four Young Dippers