Chemical enrichment and physical conditions in I Zw 18

Understand

Abridged.

• Low-metallicity star-forming dwarf galaxies are prime targets to understand the chemical enrichment of the interstellar medium.
• The HI region provides important constraints on the dispersal and mixing of heavy elements released by successive star-formation episodes.
• Our primary objective is to study the enrichment of the HI region and the interplay between star-formation history and metallicity evolution.