ISM enrichment and local pollution in dwarf galaxies

Details ISM enrichment and local pollution in dwarf galaxies ISM enrichment and local pollution in dwarf galaxies

2010-10-11

arxiv.org/abs/1010.2154v1

Astronomy and Astrophysics

Astrophysics

Cosmology and Extragalactic Astrophysics

Long version of a proceeding for the conference "A Universe of Dwarf Galaxies: Observations, Theories, Simulations" held in Ly

Scientific paper

The fate of metals after they are released in starburst episodes is still unclear. What phases of the interstellar medium are involved, in which timescales? Evidence has grown over the past few years that the neutral phase of blue compact dwarf (BCD) galaxies may be metal- deficient as compared to the ionized gas of their HII regions. These results have strong implications for our understanding of the chemical evolution of galaxies. We review here the main results and the main caveats in the abundance determination from far-UV absorption-lines. We also discuss possible scenarios concerning the journey of metals into the interstellar medium, or even their ejection from the galaxy into the intergalactic medium.

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