2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/3242I 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.6 pages, 3 figures. To be published in: Vulcano Workshop: Chemical Enrichment of Intracluster and Intergalactic Medium, eds. F. Matteucci and F. Giovannelli, ASP Conference SeriesAstrophysicstext