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| Paper: |
The Frequency of Active and Quiescent Galaxies with Companions |
| Volume: |
290, Active Galactic Nuclei: from Central Engine to Host Galaxy |
| Page: |
547 |
| Authors: |
Schmitt, H. R. |
| Abstract: |
We analyze the idea that nuclear activity, either AGN or star formation, can be triggered by interactions, studying the percentage of active, HII and quiescent galaxies with companions in the Palomar survey. A first analysis of the results showed that there is a larger percentage of LINERs, transition, and absorption line galaxies with companions than Seyferts and HII galaxies. However, we find that when we consider only galaxies of similar morphological types (ellipticals or spirals), there is no difference in the percentage of galaxies with companions among different activity types, indicating that the former result was due to the morphology-density effect. We also find that the percentage of HII galaxies with companions increases as their Hα luminosity increases, in agreement with previous results. We compare these results with previous ones and discuss their implications. |
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