Exploring the correlation between dark matter, intracluster light, and globular cluster distribution in SMACS0723
Exploring the correlation between dark matter, intracluster light, and globular cluster distribution in SMACS0723
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探索 SMACS0723 中暗物质、簇内光和球状星团分布之间的相关性
DOI：
10.1051/0004-6361/202345868
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发表时间：
2023
影响因子：
6.5
通讯作者：
Diego J
中科院分区：
文献类型：
--
作者：
Diego J
我们提出了一个自由形式的模型SMACS 0723，观察到的第一个集群与JWST。这个模型没有对星团中的质量分布（主要由暗物质组成）做出任何强有力的假设，我们用它来研究暗物质与星团内光和球状星团（GC）分布之间可能的相关性。为了探索质量模型的不确定性，我们推导出三个透镜模型的基础上光谱证实的系统和新的候选系统的红移预测的透镜模型来自光谱系统。我们发现，在最亮的星系团（BCG）的影响半径之外，总质量并不跟踪团内光（ICL），这意味着需要一个黑暗的组成部分（暗物质）。在团内光中观察到的两个环状结构与总质量（主要是暗物质）分布没有任何明显的对应关系。ICL的径向轮廓和GC的分布彼此相似，但它们比透镜模型的轮廓更陡。更具体地说，我们发现，总质量是浅的1德克斯在对数尺度比ICL和GC配置文件。这与冷暗物质的当前N体模拟非常一致。
We present a free-form model of SMACS0723, the first cluster observed with JWST. This model does not make any strong assumptions on the distribution of mass (mostly made up of dark matter) in the cluster and we use it to study the possible correlation between dark matter with the intracluster light and distribution of globular clusters (GCs). To explore the uncertainty in mass modeling, we derived three lens models based on spectroscopically confirmed systems and new candidate systems with redshifts predicted by the lens model derived from the spectroscopic systems. We find that beyond the radius of influence for the brightest cluster galaxy (BCG), the total mass does not trace the intracluster light (ICL), implying the need for a dark component (dark matter). Two loop-like structures observed in the intracluster light do not have any obvious correspondence with the total mass (of mostly dark matter) distribution. The radial profiles of the ICL and the distribution of GCs are similar to each other, but they are steeper than the profile of the lens model. More specifically, we find that the total mass is shallower by 1 dex in log scale than both ICL and GC profiles. This is in excellent agreement with currentN-body simulations of cold dark matter.