We explore the distribution of position angles (PA) of galaxies in clusters. We selected for study the isolated clusters, since the distribution of the galaxy orientation in clusters with close neighbors could be altered by gravitational influence of the latter. We assume that galaxies are aligned, if their number at one $90^o$ position angle interval is more than twice higher than at the other $90^o$ interval. We study the galaxy PA distribution at the outer regions of clusters with smaller space density, where the probability of the PA variation in the result of interactions between galaxies is smaller than at the dense central regions. We found that the alignment of galaxies is more often observed in poor clusters and concluded that originally galaxies were aligned, but in the result of accretion in time of field galaxies with arbitrary orientations and also due to the mutual interactions the relative number of aligned galaxies decreases.

中文翻译：

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关于星系团中星系的排列

我们探索了星系团中星系的位置角 (PA) 的分布。我们选择孤立的星团进行研究，因为近邻星团中的星系方向分布可能会受到后者的引力影响而改变。我们假设星系是对齐的，如果它们在一个 $90^o$ 位置角间隔的数量比另一个 $90^o$ 间隔高两倍多。我们研究了空间密度较小的星团外围区域的星系PA分布，其中星系间相互作用结果中PA变化的概率小于密集的中心区域。我们发现在较差的星团中更常观察到星系的排列，并得出结论，最初的星系是排列的，