High-excitation extranuclear gas in the Seyfert galaxy NGC 1068

Details High-excitation extranuclear gas in the Seyfert galaxy NGC 1068 High-excitation extranuclear gas in the Seyfert galaxy NGC 1068

Nov 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986apj...310l..15e&link_type=abstract

Astrophysical Journal, Part 2 - Letters to the Editor (ISSN 0004-637X), vol. 310, Nov. 1, 1986, p. L15-L19.

Astronomy and Astrophysics

Astrophysics

30

Interstellar Gas, Nebulae, Seyfert Galaxies, Balmer Series, H Ii Regions, Helium, Photoionization, Spectrophotometry

Scientific paper

Optical spectrophotometry of candidate near-nuclear H II regions in the disk of the Seyfert galaxy NGC 1068 indicates the presence of high-excitation extranuclear emission. The optical spectra appear to be very similar to ordinary H II region spectra with the addition of strong lines of forbidden Ne V 3446 and 3426 A and He II 4686 A. This is interpreted as the superposition of an H II region spectrum with the high-excitation emission and present theoretical nebular models which suggest that the high-excitation gas is most likely photoionized by a power-law spectrum, probably from the nearby Seyfert nucleus.

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