Some properties of the centers of cD galaxies

Astronomy and Astrophysics – Astronomy

Scientific paper

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Astronomical Photography, Elliptical Galaxies, Galactic Clusters, Galactic Evolution, Galactic Nuclei, Angular Resolution, Brightness

Scientific paper

A comparison of large scale images of supergiant galaxy cores with those of associated galaxies is presented, giving attention to apparent central surface brightness and the frequency of close companions in order to better constrain models for the origin and evolution of cD galaxies. It is found that, in four out of five nearby, rich cD clusters, the central surface brightness of the cD galaxy appears to be less than, or comparable to, that of neighboring giant ellipticals

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