Astronomy and Astrophysics – Astronomy
Scientific paper
Sep 1984
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984phdt.........5d&link_type=abstract
Ph.D. Thesis California Univ., Santa Cruz.
Astronomy and Astrophysics
Astronomy
6
Astronomical Spectroscopy, Galactic Nuclei, Interacting Galaxies, Seyfert Galaxies, Tides, Companion Stars, Hubble Diagram, Radial Velocity, Sky Surveys (Astronomy), Statistical Analysis, Stellar Luminosity
Scientific paper
The connection between the tidal interaction and distortion of galaxies and the phenomenon of Seyfert nuclei is studied observationally. Three different methods are used: (1) a search for close companions to Seyfert galaxies on the Palomar Sky Survey prints, and spectral measurements for their radial velocities; (2) a morphological study of Seyfert galaxies by direct imaging; and (3) a spectral survey of a large sample of interacting galaxies, in a search for Seyfert nuclei. The statistical analysis shows a clear connection between the tidal effects on galaxies and their Seyfert activity. The effect is relatively small (but statistically significant), and is far from being a one-to-one relationship. Therefore it provides only a partial solution to the problem of matter supply to luminous active nuclei.
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