Dispersion in DLA metallicities and deuterium abundances

Irina Dvorkin, Joseph Silk, Elisabeth Vangioni, Patrick Petitjean, Keith A. Olive

Research output: Contribution to journalArticle

Abstract

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.

Original languageEnglish (US)
Pages (from-to)354-356
Number of pages3
JournalProceedings of the International Astronomical Union
Volume11
Issue numberS321
DOIs
StatePublished - Mar 1 2016

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Keywords

  • ISM: abundances
  • galaxies: ISM
  • galaxies: abundances
  • galaxies: evolution

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