On the excess of physical companions among Seyfert galaxies

Details On the excess of physical companions among Seyfert galaxies On the excess of physical companions among Seyfert galaxies

Apr 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995aj....109.1546r&link_type=abstract

Astronomical Journal (ISSN 0004-6256), vol. 109, no. 4, p.1546-1554

Astronomy and Astrophysics

Astronomy

75

Interacting Galaxies, Red Shift, Seyfert Galaxies, Star Formation, Black Holes (Astronomy), Galactic Evolution, Spectrum Analysis, Star Formation Rate

Scientific paper

The results of a search for close companions in two magnitude limited samples (mB less than or equal to 15.5) of 99 Seyfert 1 and 98 Seyfert 2 galaxies are presented. It is found that there is an excess of physical companions in both samples of galaxies, compared with two control samples of normal field spiral galaxies. The calculated lower limit percentages of physical companions are (12 +/- 3)% and (12 +/- 4)% for Seyfert 1 and Seyfert 2, respectively, while the upper limits on the percentage of galaxies with physical companions are in the range (0%-5%) in both control samples. The excess is confirmed by analysis of the redshifts for all pairs found in the complete, magnitude limited (B(O) less than or equal to 14.5) CfA sample of Seyfert galaxies.

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