On the metal abundance of low-activity galactic nuclei

Details On the metal abundance of low-activity galactic nuclei On the metal abundance of low-activity galactic nuclei

Dec 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989apj...347..195s&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 347, Dec. 1, 1989, p. 195-200. Research supported by FINEP and CNPq.

Other

59

Abundance, Galactic Nuclei, Metallicity, Stellar Composition, Absorption Spectra, Line Spectra, Photoionization, Seyfert Galaxies, Stellar Spectra

Scientific paper

The characteristics of the nuclear spectrum of six Seyfert 2 and LINER nuclei with low activity and strong lines of ionized nitrogen are investigated. From the equivalent widths of the absorption lines, the age and metallicity of the stellar population are derived. A comparison of the observed emission-line intensities with photoionization and shock model calculations leads to the conclusion that these nuclei are photoionized by a power-law continuum, and that the only way to reproduce the large forbidden line N II/H-alpha ratio for at least four of them is with an overabundance of nitrogen relative to the other heavy elements.

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