Enrichment of the Intergalactic Medium by the Milky Way Subgroup

Abstract

I study the effect of the galaxies of the Milky Way subgroup on the chemical enrichment of the diffuse gas within the Local Group. The preferred model predicts that the present-day intergalactic medium mass is 1/22 of the initial baryonic mass and its metallicity is 1/20 $Z_{\odot }$. Nearly 80 % of intergalactic metals were produced in the Galactic bulge.

arXiv comment6 pages, 3 figures. To be published in: Vulcano Workshop: Chemical Enrichment of Intracluster and Intergalactic Medium, eds. F. Matteucci and F. Giovannelli, ASP Conference Series