In the (logR_e_, μ_e_) plane defined by the logarithm of the effective radius and the effective surface brightness, elliptical galaxies that are members of Hickson's compact groups turn out to belong to the bright family, thus suggesting that most of them have likely experiences subtantial secondary evolution.
New evidence for mergers in compact groups of galaxies
D'ONOFRIO, MAURO;
1994
Abstract
In the (logR_e_, μ_e_) plane defined by the logarithm of the effective radius and the effective surface brightness, elliptical galaxies that are members of Hickson's compact groups turn out to belong to the bright family, thus suggesting that most of them have likely experiences subtantial secondary evolution.
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