Dispersion in DLA metallicities and deuterium abundances

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

Research output: Contribution to journalArticlepeer-review


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
Issue numberS321
StatePublished - Mar 1 2016

Bibliographical note

Funding Information:
Irina Dvorkin thanks the organizers for an interesting and stimulating conference. The work of ID and JS was supported by the ERC Project No. 267117 (DARK) hosted by UniversitéPierre et Marie Curie (UPMC) - Paris 6, PI J. Silk. JS acknowledges the support of the JHU by NSF grant OIA-1124403. The work of KAO was supported in part by DOE grant DE-SC0011842 at the University of Minnesota. This work has been carried out at the ILP LABEX (under reference ANR-10-LABX-63) supported by French state funds managed by the ANR within the Investissements d’Avenir programme under reference ANR-11-IDEX-0004-02.


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


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