1. Probing Interstellar Silicate Dust Grain Properties in Quasar Absorption Systems at Redshifts z<1.4
- Author
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Debopam Som, Daniel E. Welty, Monique Aller, Giovanni Vladilo, Donald G. York, and Varsha P. Kulkarni
- Subjects
Physics ,South carolina ,Astrophysics::High Energy Astrophysical Phenomena ,FOS: Physical sciences ,Quasar ,Astrophysics::Cosmology and Extragalactic Astrophysics ,Astrophysics ,Redshift ,Silicate ,chemistry.chemical_compound ,chemistry ,13. Climate action ,Astrophysics of Galaxies (astro-ph.GA) ,Astrophysics::Solar and Stellar Astrophysics ,Astrophysics::Earth and Planetary Astrophysics ,Absorption (electromagnetic radiation) ,Astrophysics::Galaxy Astrophysics - Abstract
Absorption lines in the spectra of distant quasars whose sightlines pass through foreground galaxies provide a valuable tool to probe the dust and gas compositions of the interstellar medium (ISM) in galaxies. The first evidence of silicate dust in a quasar absorption system (QAS) was provided through our detection of the 10 micron silicate feature in the z=0.52 absorber toward the quasar AO 0235+164. We present results from 2 follow-up programs using archival Spitzer Space Telescope infrared spectra to study the interstellar silicate dust grain properties in a total of 13 QASs at 0.1, 6 pages, 2 figures. To appear in the proceedings of "The Life Cycle of Dust in the Universe: Observations, Theory, and Laboratory Experiments", Taipei, Taiwan
- Published
- 2014
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