ULTRAVIOLET LINES AND GAS-COMPOSITION IN NGC-1068

Authors
Citation
H. Netzer, ULTRAVIOLET LINES AND GAS-COMPOSITION IN NGC-1068, Astrophysics and space science, 248(1-2), 1997, pp. 127-134
Citations number
15
Categorie Soggetti
Astronomy & Astrophysics
ISSN journal
0004640X
Volume
248
Issue
1-2
Year of publication
1997
Pages
127 - 134
Database
ISI
SICI code
0004-640X(1997)248:1-2<127:ULAGIN>2.0.ZU;2-X
Abstract
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; whi ch is presented elsewhere, suggests a large Fe/H and the data shown an d discussed here, in particular the extremely weak O III] lambda 1663 line, argue for small O/N and O/C. Models to support this claim are sh own and discussed. They include improved reddening estimates, dusty an d dust-free calculations, and abnormal abundances. The anomalous compo sition makes NGC 1068 unique among Seyfert galaxies and an unusual lab oratory for investigating metal enrichment and depletion.