Is there any pristine gas in nearby starburst galaxies?

Details Is there any pristine gas in nearby starburst galaxies? Is there any pristine gas in nearby starburst galaxies?

Dec 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008iaus..255..278l&link_type=abstract

Low-Metallicity Star Formation: From the First Stars to Dwarf Galaxies, Proceedings of the International Astronomical Union, IAU

Other

Ism: Abundances, (Ism:) Hii Regions, Galaxies: Abundances, Galaxies: Dwarf, Galaxies: Starburst, Galaxies: Ism, Ultraviolet: Ism, Ultraviolet: Galaxies

Scientific paper

We derive the chemical composition of the neutral gas in the blue compact dwarf (BCD) Pox 36 observed with FUSE. Metals (N, O, Ar, and Fe) are underabundant as compared to the ionized gas associated with H ii regions by a factor ~7. The neutral gas, although it is not pristine, is thus probably less chemically evolved than the ionized gas. This could be due to different dispersal and mixing timescales. Results are compared to those of other BCDs observed with FUSE. The metallicity of the neutral gas in BCDs seems to reach a lower threshold of ~1/50 Z&sun; for extremely-metal poor galaxies.

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