A Search for 9.7 micrometer Silicate Absorption in Strong Quasar Absorption Systems

Details A Search for 9.7 micrometer Silicate Absorption in Strong Quasar Absorption Systems A Search for 9.7 micrometer Silicate Absorption in Strong Quasar Absorption Systems

May 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007aas...21011307k&link_type=abstract

American Astronomical Society Meeting 210, #113.07; Bulletin of the American Astronomical Society, Vol. 39, p.238

Astronomy and Astrophysics

Astronomy

Scientific paper

Previous studies of spectral features from dust in quasar absorption systems have focussed mainly on the 2175 A bump. We are carrying out a search for the 9.7 micron silicate absorption feature in strong quasar absorption systems using the Spitzer Infrared Spectrograph (IRS).
We report possible detections of the feature in two intermediate-redshift quasar absorbers and discuss their implications for the nature of dust in these distant galaxies. Further studies of the 9.7 micrometer silicate feature in quasar absorber galaxies are essential to obtain a new window on the dust in distant galaxies.
We acknowledge support from a NASA award issued byJPL/Caltech. VPK also acknowledges funding from NSF grant AST-0607739.

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