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Constraining the Intergalactic Medium Enrichment History with QSO Pairs

Published online by Cambridge University Press:  09 March 2010

Evan Scannapieco  and
Crystal L. Martin
Evan Scannapieco
Affiliation:
School of Earth and Space Exploration, Arizona State University, P.O. Box 871404, Tempe, AZ, 85287–1404 email: evan.scannapieco@asu.edu
Crystal L. Martin
Affiliation:
Dept. of Physics, University of California, Santa Barbara, CA, 93106
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Abstract

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Intergalactic metals are ubiquitous, but their sources remain unknown. A key constraint on these sources is the spatial distributions of metals. Yet, the clustering of metals is difficult to interpret along single lines-of-sight, because distance and velocity information are mixed in redshift space. To overcome this situation we are carrying out detailed comparisons between the line-of-sight and transverse distributions of metal line absorption systems observed in a large sample of QSO pairs and simulations including a wide range of IGM-enrichment scenarios. The degeneracy between distance and velocity is broken by the transverse information available in pairs of sightlines, and thus these comparisons are providing unique new constraints on when and where metals were ejected from galaxies.

Keywords

intergalactic mediumQSO absorption lines
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 5 , Symposium S265: Chemical Abundances in the Universe: Connecting First Stars to Planets , August 2009 , pp. 163 - 166
Copyright
Copyright © International Astronomical Union 2010

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