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Cambridge University Press, Proceedings of the International Astronomical Union, S245(3), p. 235-236, 2007

DOI: 10.1017/s1743921308017742

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Searching for Mergers in Early-Type QSO Host Galaxies and a Control Sample of Inactive Ellipticals

Journal article published in 2007 by Nicola Bennert, Gabriela Canalizo, Bruno Jungwiert, Alan Stockton, Francois Schweizer ORCID, Chien Peng, Mark Lacy
This paper is made freely available by the publisher.
This paper is made freely available by the publisher.

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Abstract

We present very deep HST/ACS images of five QSO host galaxies, classified as undisturbed ellipticals in earlier studies. For four of the five objects, our images reveal strong signs of interaction such as tidal tails, shells, and other fine structure, suggesting that a large fraction of QSO host galaxies may have experienced a relatively recent merger event. Our preliminary results for a control sample of inactive elliptical galaxies do not reveal comparable fine structure. Comment: 2 pages, 1 figure; To appear in the proceedings of IAU Symposium 245, "Formation and Evolution of Galaxy Bulges," M. Bureau, E. Athanassoula, and B. Barbuy, eds