a Search for Primordial Gas; is IZW18 a Young Galaxy ?

Details a Search for Primordial Gas; is IZW18 a Young Galaxy ? a Search for Primordial Gas; is IZW18 a Young Galaxy ?

Jul 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991hst..prop.2078l&link_type=abstract

HST Proposal ID #2078

Computer Science

Hst Proposal Id #2078

Scientific paper

Amongst blue compact galaxies, IZw 18 has the lowest heavy-element abundances in its HII regions and is by far the best candidate for a young galaxy experiencing its first star formation. If this is the case, its HII-region heavy elements may have been produced by the present burst of star formation and the surrounding neutral gas may be primeval, without heavy elements. We aim at checking this possibility by obtaining upper limits or measuring the abundance of neutral oxygen in this gas using the strong OI line at 1302A in absorption in front of the star cluster that ionizes the HII region.

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