Detection of forbidden NI II lambda 7378 in six Seyfert galaxies

Details Detection of forbidden NI II lambda 7378 in six Seyfert galaxies Detection of forbidden NI II lambda 7378 in six Seyfert galaxies

Feb 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986apj...301..753h&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 301, Feb. 15, 1986, p. 753-758. Previously announced in STAR as N86-14205.

Astronomy and Astrophysics

Astrophysics

18

Abundance, Crab Nebula, Detection, Nickel, Seyfert Galaxies, Flux (Rate), Line Spectra, Red Shift, Supernovae

Scientific paper

The authors detected a line due to [Ni II] λ7378 in the Seyfert galaxies NGC 1068, NGC 2110, NGC 3227, NGC 4151, NGC 5506, and Arp 102 B. The average Ni abundance is about 2 times solar, which is 5 times less than in the filaments of the Crab Nebula. This argues for nucleosynthetic processing in the latter. The [Ni II] line is spatially resolved in NGC 1068, and shows at least a factor of 4 enhancement in the Ni abundance away from the nucleus. The off-nuclear abundance of Ni in NGC 1068 approaches that of the Crab, which strongly suggests that Type II supernovae enriched the off-nuclear gas clouds.

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