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On the metal abundance of low-activity galactic nuclei

1989; IOP Publishing; Volume: 347; Linguagem: Inglês

10.1086/168109

1538-4357

Thaisa Storchi‐Bergmann, M. G. Pastoriza,

Atomic and Molecular Physics

view Abstract Citations (68) References (27) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS On the Metal Abundance of Low-Activity Galactic Nuclei Storchi Bergmann, Thaisa ; Pastoriza, Miriani Griselda Abstract 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 [N II]/Hα ratio for at least four of them is with an overabundance of nitrogen relative to the other heavy elements. Publication: The Astrophysical Journal Pub Date: December 1989 DOI: 10.1086/168109 Bibcode: 1989ApJ...347..195S Keywords: Abundance; Galactic Nuclei; Metallicity; Stellar Composition; Absorption Spectra; Line Spectra; Photoionization; Seyfert Galaxies; Stellar Spectra; Astrophysics; GALAXIES: STELLAR CONTENT; GALAXIES: ABUNDANCES full text sources ADS | data products SIMBAD (6) NED (6)