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arXiv 0905.2991astro-ph.CO
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合并双星星系团中的星系活动

Galaxy Activity in Merging Binary Galaxy Clusters

Ho Seong Hwang, Myung Gyoon Lee

摘要:

利用斯隆数字巡天(SDSS)数据,结合文献资料,对两个合并双星团(A168和A1750)的星系活动进行了研究。结合两体动力学模型和X射线数据,研究了A168和A1750的合并历史。在A168中,两个子星系团似乎已经相互通过,并从最近的最大分离中走到一起。在A1750中,两个主要的子星系团似乎已经开始相互作用,并首次走到一起。我们发现在A168的两个子星系团之间的区域中,显示恒星形成(SF)或活动星系核(AGN)活动的星系的浓度增加,这可能是由星系团合并引发的。在A1750中,我们没有发现任何星系的SF/AGN活动在两个子团之间的区域,这表明两个主要的子团合并的早期阶段。

英文摘要:

We present the results of a study of galaxy activity in two merging binary clusters (A168 and A1750) using the Sloan Digital Sky Survey (SDSS) data supplemented with the data in the literature. We have investigated the merger histories of A168 and A1750 by combining the results from a two-body dynamical model and X-ray data. In A168 two subclusters appear to have passed each other and to be coming together from the recent maximum separation. In A1750, two major subclusters appear to have started interaction and to be coming together for the first time. We find an enhanced concentration of the galaxies showing star formation (SF) or active galactic nuclei (AGN) activity in the region between two subclusters in A168, which were possibly triggered by the cluster merger. In A1750, we do not find any galaxies with SF/AGN activity in the region between two subclusters, indicating that two major subclusters are in the early stage of merging.

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。

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