Astronomy and Astrophysics – Astrophysics
Scientific paper
Jun 2006
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006aspc..348..486l&link_type=abstract
Astrophysics in the Far Ultraviolet: Five Years of Discovery with FUSE ASP Conference Series, Vol. 348, Proceedings of the Confe
Astronomy and Astrophysics
Astrophysics
Scientific paper
We present the far-UV spectroscopic study of the giant H II region NGC604 in the dwarf spiral galaxy M33. Neutral hydrogen and many metal lines are observed in absorption against the continuum given by the young massive stars embedded in the ionized gas. From profile fitting, we determine the abundances in the diffuse neutral gas and compare them with the ionized gas values. We find that nitrogen, oxygen, argon and iron are underabundant in the neutral phase by a factor of ˜6. This could either be explained by the presence of less chemically evolved gas pockets in the sightlines or by dense clouds out of which H II regions form. Those could be more metallic than the diffuse medium.
Aloisi Alessandra
Kunth Daniel
Lebouteiller Vianney
Lequeux James
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