Ultraviolet Lines and Gas Composition in NGC 1068

Details Ultraviolet Lines and Gas Composition in NGC 1068 Ultraviolet Lines and Gas Composition in NGC 1068

1997-06-15

arxiv.org/abs/astro-ph/9706140v1

Astrophys.Space Sci. 248 (1997) 127-134

Astronomy and Astrophysics

Astrophysics

10 pages, latex plus one figure To appear in Astrophysics and Space Science

Scientific paper

10.1023/A:1000509024526

Recent ultraviolet and X-ray observations suggest that the Fe/O ratio in the NLR gas in NGC 1068 is abnormally high. The X-ray analysis, which is presented elsewhere, suggests a large Fe/H and the data shown and discussed here, in particular the extremely weak Oiii] 1664 line, argue for small O/N and O/C. Models to support this claim are shown and discussed. They include improved reddening estimates, dusty and dust-free calculations, and a range of abundances. The anomelous composition makes NGC 1068 unique among Seyfert galaxies and an unusual laboratory for investigating metal enrichment and depletion.

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