Detection of the 2175 Å dust feature from The Sloan Digital Sky Survey first and second data releases

Details Detection of the 2175 Å dust feature from The Sloan Digital Sky Survey first and second data releases Detection of the 2175 Å dust feature from The Sloan Digital Sky Survey first and second data releases

Mar 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005pgqa.conf..331w&link_type=abstract

Probing Galaxies through Quasar Absorption Lines, IAU Colloquium Proceedings of the International Astronomical Union 199, held M

Astronomy and Astrophysics

Astronomy

1

Scientific paper

We summarise our detections of the 2175 å feature due to dust extinction in intervening galaxies toward quasars with redshifts z>0.9 from the sloan digital sky survey first and second data release. For the 15 Mg II absorption systems selected from ˜22,000 quasar spectra, the observed extinction 2175 å "bump" with various strengths can be well fitted using template quasar spectra reddened with dust located in the Mg II absorber redshift. The dust extinctions are characterised by either a parameterised galactic extinction law, or empirical extinction curves for the large magellanic cloud and the small magellanic cloud. We observe that our sample of intervening galaxies exhibiting dust features are all strong Mg II absorbers (ewΛ 2796>1.7å). The various strengths of the absorption features imply a diversity of dust properties at high redshift. The Mg II systems showing the 2175 å absorption are characterised by their large Mg II ew, high H I column density, and heavy reddening.

Affiliated with

Also associated with

No associations

Rating

Detection of the 2175 Å dust feature from The Sloan Digital Sky Survey first and second data releases does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Detection of the 2175 Å dust feature from The Sloan Digital Sky Survey first and second data releases, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Detection of the 2175 Å dust feature from The Sloan Digital Sky Survey first and second data releases will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1566885