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Dispersion in DLA metallicities and deuterium abundances

Published online by Cambridge University Press:  21 March 2017

Irina Dvorkin ,
Joseph Silk ,
Elisabeth Vangioni ,
Patrick Petitjean  and
Keith A. Olive
Irina Dvorkin
Affiliation:
Sorbonne Universités, UPMC Univ Paris 6 et CNRS, UMR 7095, Institut dAstrophysique de Paris, 98 bis bd Arago, F-75014 Paris, France
Joseph Silk
Affiliation:
Sorbonne Universités, UPMC Univ Paris 6 et CNRS, UMR 7095, Institut dAstrophysique de Paris, 98 bis bd Arago, F-75014 Paris, France AIM-Paris-Saclay, CEA/DSM/IRFU, CNRS, Univ. Paris VII, F-91191 Gif-sur-Yvette, France Department of Physics and Astronomy, The Johns Hopkins University, Baltimore, MD 21218, USA BIPAC, University of Oxford, 1 Keble Road, Oxford OX1 3RH, UK
Elisabeth Vangioni
Affiliation:
Sorbonne Universités, UPMC Univ Paris 6 et CNRS, UMR 7095, Institut dAstrophysique de Paris, 98 bis bd Arago, F-75014 Paris, France
Patrick Petitjean
Affiliation:
Sorbonne Universités, UPMC Univ Paris 6 et CNRS, UMR 7095, Institut dAstrophysique de Paris, 98 bis bd Arago, F-75014 Paris, France
Keith A. Olive
Affiliation:
William I. Fine Theoretical Physics Institute, School of Physics and Astronomy, University of Minnesota, Minneapolis, MN 55455, USA
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Abstract

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Recent chemical abundance measurements of damped Lyman-alpha absorbers (DLAs) revealed a large intrinsic scatter in their metallicities. We discuss a semi-analytic model that was specifically designed to study this scatter by tracing the chemical evolution of the interstellar matter in small regions of the Universe with different mean density, from over- to underdense regions. It is shown that different histories of structure formation in these regions are reflected in the chemical properties of the proto-galaxies. We also address deuterium abundance measurements, which constitute a complementary probe of the star formation and infall histories.

Keywords

ISM: abundancesgalaxies: abundancesgalaxies: evolutiongalaxies: ISM
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 11 , Symposium S321: Formation and Evolution of Galaxy Outskirts , March 2016 , pp. 354 - 356
Copyright
Copyright © International Astronomical Union 2017 

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