星系团Abell 3558外围的两个大尺度晃动冷锋

Q1 Earth and Planetary Sciences

Monthly Notices of the Royal Astronomical Society: Letters Pub Date : 2023-08-30 DOI:10.1093/mnrasl/slad129

M. Mirakhor, S. Walker, M. Sundquist, D. Chandra

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引用次数: 0

摘要

先前对附近大质量星系团Abell 3558的研究报告称，星系团核心周围有一个冷锋，这是由于过去一次小型合并产生的引力干扰导致核心晃动造成的。在这里，我们使用XMM-Newton马赛克，报告了在Abell 3558冷却半径之外发现的两个罕见的大尺度晃动冷锋。探测到的冷锋之一位于距集群核心东南600公里的地方，而另一个位于距集群核心西北120公里的地方。后一种冷锋是在星系团中观测到的最远的冷锋之一。我们的发现与之前的研究一致，即晃动可以远远超出冷却半径，在超过病毒半径一半的尺度上，这表明晃动是一种整个星团的现象，可能会影响星团的整体特性。

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Two large-scale sloshing cold fronts in the outskirts of the galaxy cluster Abell 3558

Previous studies of the massive nearby galaxy cluster Abell 3558 reported a cold front around the cluster core, which is attributed to the sloshing of the core as it responds to the gravitational disturbance created by a past minor merger. Here, using XMM-Newton mosaic, we report the detection of two rare large-scale sloshing cold fronts far outside the cooling radius of Abell 3558. One of the detected cold fronts is located 600 kpc from the cluster core to the south-east, while the other is located 1.2 Mpc from the cluster core to the north-west. The latter cold front is one of the most distant cold fronts ever observed in a galaxy cluster. Our findings are in agreement with previous studies that sloshing can extend well beyond the cooling radius, on scales exceeding half the virial radius, suggesting that sloshing is a cluster-wide phenomenon and may affect the cluster’s global properties.

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来源期刊

Monthly Notices of the Royal Astronomical Society: Letters Earth and Planetary Sciences-Space and Planetary Science

CiteScore

8.80

自引率

0.00%

发文量

136

期刊介绍： For papers that merit urgent publication, MNRAS Letters, the online section of Monthly Notices of the Royal Astronomical Society, publishes short, topical and significant research in all fields of astronomy. Letters should be self-contained and describe the results of an original study whose rapid publication might be expected to have a significant influence on the subsequent development of research in the associated subject area. The 5-page limit must be respected. Authors are required to state their reasons for seeking publication in the form of a Letter when submitting their manuscript.