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Galaxy Metallicities, Masses and Outflows at Redshifts 1 ≲ Z ≲ 3: An Observational Perspective

Published online by Cambridge University Press:  21 April 2007

E. Emsellem ,
H. Wozniak ,
G. Massacrier ,
J.-F. Gonzalez ,
J. Devriendt ,
N. Champavert  and
D.K. Erb
D.K. Erb*
Affiliation:
Harvard-Smithsonian Center for Astrophysics, 60 Garden St., Cambridge, MA 02138, USA
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Abstract

I review the most widely used methods of determining chemicalabundances in galaxies at 1≲ z ≲ 3, including emission andabsorption line techniques (including a brief discussion of DampedLyman Alpha systems). Most star-forming galaxies at these redshiftsshow significant enrichment, with ~1/3 solar to ~solarmetallicities. They are overluminous for their metallicities comparedto local galaxies, and the mass-metallicity relation at z ~ 2 isoffset to lower metallicities compared to the local relation. Metalsare also seen in the IGM at these redshifts, most likely fromgalactic-scale outflows in the galaxies themselves.

Type
Research Article
Information
European Astronomical Society Publications Series , Volume 24: CRAL-2006. Chemodynamics: From First Stars to Local Galaxies , 2007 , pp. 191 - 202
Copyright
© EAS, EDP Sciences, 2007

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