Study of a complete sample of galaxies. II - Spectroscopy of the nuclei

Details Study of a complete sample of galaxies. II - Spectroscopy of the nuclei Study of a complete sample of galaxies. II - Spectroscopy of the nuclei

Dec 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986a%26as...66..335v&link_type=abstract

Astronomy and Astrophysics Supplement Series (ISSN 0365-0138), vol. 66, no. 3, Dec. 1986, p. 335-372.

Physics

Optics

153

Astronomical Spectroscopy, Galactic Nuclei, Hot Stars, Seyfert Galaxies, Astronomical Catalogs, Cassegrain Optics, Emission Spectra, H Alpha Line, H Ii Regions, Magnitude, Spectrum Analysis

Scientific paper

The authors have made spectroscopic observations of the nuclei of a complete sub-sample of galaxies. This sample comprises all (320) galaxies from the Revised Shapley-Ames Catalogue (Sandage and Tammann, 1981), with δ ≤ +20°, a galactocentric velocity lower than 3000 km s-1, and an absolute magnitude brighter than MB = -21.0. The spectra obtained at a dispersion of 171 Å mm-1 cover the range ≡4000 - 7000 Å. Emission lines have been detected in 202 galaxies. Most of the spectra could be classified as being either: (1) H II regions ionized by hot stars; or (2) Seyfert-like nebulosities including Seyfert 1, Seyfert 2, and Liners. 149 galaxies have been reobserved at 59 Å mm-1 around Hα.

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