Ultraviolet lines and gas composition in NGC 1068

Research output: Contribution to journalArticlepeer-review

Abstract

Recent ultraviolet and X-ray observations suggest that the Fc/O ratio in the NLR gas in NGC 1068 is abnormally high. The X-ray analysis, which is presented elsewhere, suggests a large Fc/H and the data shown and discussed here, in particular the extremely weak O III] λ1663 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 abnormal abundances. The anomalous composition makes NGC 1068 unique among Seyfert galaxies and an unusual laboratory for investigating metal enrichment and depletion.

Original languageEnglish
Pages (from-to)127-134
Number of pages8
JournalAstrophysics and Space Science
Volume248
Issue number1-2
DOIs
StatePublished - 1997

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