On the ratio (N II)/H-alpha in the nucleus of Seyfert 2 and LINER galaxies

Details On the ratio (N II)/H-alpha in the nucleus of Seyfert 2 and LINER galaxies On the ratio (N II)/H-alpha in the nucleus of Seyfert 2 and LINER galaxies

Apr 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991mnras.249..404s&link_type=abstract

Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 249, April 1, 1991, p. 404-408. Research supported by F

Mathematics

Logic

33

Forbidden Transitions, Galactic Nuclei, H Alpha Line, Nitrogen, Seyfert Galaxies, Stellar Spectra, Emission Spectra, Histograms, Stellar Luminosity, Stellar Radiation

Scientific paper

The dependence of the (N II)/H-alpha ratio of 180 Seyfert 2 and LINER nuclei on the aperture used in the observations is investigated and quantified. When the aperture effect is taken into account it can be concluded that the majority of Seyfert 2 and LINER galaxies present (N II)/H-alpha above 1.5, which means an overabundance of nitrogen in the nucleus, according to results of previous works. The relationship of (N II)/H-alpha to nuclear compact radio emission, absolute magnitude and morphological type of parent galaxy are also investigated.

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