Broadband imaging of eight isolated (?) Seyfert galaxies

Details Broadband imaging of eight isolated (?) Seyfert galaxies Broadband imaging of eight isolated (?) Seyfert galaxies

Dec 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991aj....102.1980x&link_type=abstract

Astronomical Journal (ISSN 0004-6256), vol. 102, Dec. 1991, p. 1980-1990. Research supported by NSERC.

Mathematics

Logic

11

Active Galactic Nuclei, Galactic Radiation, Seyfert Galaxies, Broadband, Galactic Clusters

Scientific paper

Tidal triggering by companion galaxies has been proposed as the main mechanism responsible for nuclear activity in Seyfert galaxies. However, although Seyfert galaxies show a tendency to occur in multiple systems, there is a small fraction of these galaxies that appear to be completely isolated. For eight interaction activity class 1 Seyfert galaxies, 'completely isolated' as defined by Dahari (1984), CCD V images were obtained to search for possible faint or hidden companions or other signs of distortions - evidence of a recent interaction. Two galaxies appear to have distant companions. More than 3/4 of the sample contains some type of morphological asymmetry. One galaxy (Mrk 686) shows a very prominent bar and three more (Mrk 1469, Mrk 885, and NGC 4235) show a hint of a bar. Mrk 486 appears to have a jetlike distortion. Only Mrk 1388 appears to be symmetrical.

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