Dust Reddening in SDSS Quasars

Details Dust Reddening in SDSS Quasars Dust Reddening in SDSS Quasars

2004-06-11

arxiv.org/abs/astro-ph/0406293v1

Astron.J. 128 (2004) 1112-1123

Astronomy and Astrophysics

Astrophysics

29 pages including 8 figures. AJ, September 2004 issue

Scientific paper

10.1086/423291

We explore the form of extragalactic reddening toward quasars using a sample of 9566 quasars with redshifts 0 0.1; less than 1% have E_{B-V} > 0.2, where the extinction is relative to quasars with modal colors. Reddening is uncorrelated with the presence of intervening narrow-line absorption systems, but reddened quasars are much more likely to show narrow absorption at the redshift of the quasar than are unreddened quasars. Thus the reddening towards quasars is dominated by SMC-like dust at the quasar redshift.

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