论文标题
关于簇中星系的对齐
On the Alignment of Galaxies in Clusters
论文作者
论文摘要
我们探索星系中星系的位置角（PA）的分布。我们选择了研究分离的簇，因为后者的重力影响可能会改变邻居群集中星系方向的分布。我们假设星系是对齐的，如果它们的数字为$ 90^o $ $位置间隔的数字是其他$ 90^o $间隔的两倍以上。我们研究了簇密度较小的簇外区域的星系PA分布，其中PA变化在星系之间相互作用的可能性小于密集的中央区域。我们发现，在较差的簇中经常观察到星系的比对，并得出结论，最初的星系是对齐的，但是由于具有任意取向的田间星系的积聚，也是由于相互相互作用的相对数量，因此对齐星系的相对数量减少了。
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.
