The group environment of Seyfert galaxies.

Details The group environment of Seyfert galaxies. The group environment of Seyfert galaxies.

Jul 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989a%26a...219...34k&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 219, no. 1-2, July 1989, p. 34-52.

Astronomy and Astrophysics

Astrophysics

33

Active Galactic Nuclei, Astronomical Spectroscopy, Galactic Clusters, Seyfert Galaxies, Emission Spectra, Galactic Mass, H Alpha Line, Quasars

Scientific paper

On Palomar and ESO Schmidt plates loose groups of 1 Mpc size are identified. Spectroscopy of 15 such groups containing a Seyfert galaxy and 9 loose groups without a Seyfert galaxy comprising a total number of 113 galaxies is presented. Using qualitative and absolute optical spectroscopic criteria, the activity pattern in groups is described. Galaxies with strong emission-line activity are found in Seyfert groups out to distances 300 kpc away from the Seyfert galaxy while in non-Seyfert groups such galaxies are virtually absent. The theoretical implications of these results with regard to the structural and dynamical conditions for tidally induced starburst and Seyfert activity are discussed.

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