arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 0911.2771astro-ph.CO
收藏

星系群的取向与本超星系团的形成

The orientations of galaxy groups and formation of the Local Supercluster

Wlodzimierz Godlowski, Piotr Flin

摘要:

我们分析了本超星系团(LSC)中星系群的取向。它与尺度中邻近群体的分布密切相关,直到约20 Mpc。星系群的长轴与两个最亮星系的连线和大南锥中心的方向一致,即室女星系团。这些相关性表明,两个最明亮的星系是由指向原超星系团中心的物质细丝形成的。之后,等级聚类导致星系聚集在这两个星系周围。这些组形成在相同或类似取向的长丝上。这与数值模拟的预测相一致。

英文摘要:

We analysed the orientation of galaxy groups in the Local Supercluster (LSC). It is strongly correlated with the distribution of neighbouring groups in the scale till about 20 Mpc. The group major axis is in alignment with both the line joining the two brightest galaxies and the direction toward the centre of the LSC, i.e. Virgo cluster. These correlations suggest that two brightest galaxies were formed in filaments of matter directed towards the protosupercluster centre. Afterwards, the hierarchical clustering leads to aggregation of galaxies around these two galaxies. The groups are formed on the same or similarly oriented filaments. This picture is in agreement with the predictions of numerical simulations.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑