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arXiv 2009.08159astro-ph.GA
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落入大质量星系团的富HI星系的冲压压力剥离

Ram pressure stripping of HI-rich galaxies infalling into massive clusters

Jing Wang, Weiwei Xu, Bumhyun Lee, Min Du, Roderik Overzier, Li Shao

摘要:

本文估计了X射线探测星系团中富HI星系的冲压压力剥离强度。我们发现,在较强的RPS下的星系往往表现出更显着减少总HI质量和增强中央SFR相比,在该领域的控制星系具有类似的恒星质量,恒星表面密度和积分恒星形成率。在强或弱RPS下的Galerkin约占R200处HI丰富人口的40%,甚至在最大规模的集群中超过R200。我们的研究结果表明,RPS作为一个通道的环境处理远之前,星系到达星系团的核心区域的重要作用。

英文摘要:

We estimate the strength of ram pressure stripping (RPS) for HI-rich galaxies in X-ray detected clusters. We find that galaxies under stronger RPS tend to show more significantly reduced total HI mass and enhanced central SFR, compared to control galaxies in the field which have similar stellar mass, stellar surface density and integral star formation rate. Galaxies under strong or weak RPS account for around 40% of the HI-rich population at R200, and even beyond R200 in the most massive clusters. Our results imply the important role of RPS as a channel of environmental processing far before the galaxies reach the core region of clusters.

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