We model the surface brightness profiles of a sample of 119 Abell Brightest Cluster Galaxies (BCG), finding a generalised deVaucouleurs R^{1/n} law, where n is a free parameter, to be appropriate. Departures from the R^{1/4} law are shown to be a real feature of galaxy profiles, not due to observational errors or coupling of n with the other model parameters. BCG typically have values of n greater than 4. The shape parameter n is shown to correlate with effective half-light radius, such that the larger BCG have larger values of n. This continues a trend noticed amongst ordinary elliptical galaxies and dwarf ellipticals, such that the fainter galaxies have smaller values of n.
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机译：我们对119个Abell最亮簇星系（BCG）的样本的表面亮度分布进行建模，找到了广义的deVaucouleurs R ^ {1 / n}定律，其中n为自由参数是合适的。事实证明，背离R ^ {1/4}定律是银河剖面的真实特征，而不是由于观测误差或n与其他模型参数的耦合所致。 BCG通常具有大于4的n值。形状参数n显示为与有效半光半径相关，因此，较大的BCG具有较大的n值。这延续了普通椭圆星系和矮椭圆星系中的趋势，使得较暗的星系的n值较小。
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