论文标题
集群内的光作为总物质密度分布的示踪剂：模拟的视图
The intra-cluster light as a tracer of the total matter density distribution: a view from simulations
论文作者
论文摘要
通过对星系簇的深刻观察，最近发现，预计的恒星质量密度紧随预计的总（深色和重型）质量密度，最内向〜140 kpc。在这项工作中，我们旨在使用群集 - eagle模拟测试这些观察结果，并比较直接从模拟中推断出的预计密度。我们使用Montes \＆Trujillo（2019）的过程比较了ISO密度轮廓，并发现恒星质量分布的形状比观察到的总物质的形状更接近，尽管它们的径向特征有很大差异。恒星和总物质密度曲线之间的比率显示出接近-1的斜率，对簇的总质量的依赖性很小。我们提出了一种间接方法来计算群集内恒星质量密度的径向曲线的光环质量和质量密度曲线。
By using deep observations of clusters of galaxies, it has been recently found that the projected stellar mass density closely follows the projected total (dark and baryonic) mass density within the innermost ~140 kpc. In this work, we aim to test these observations using the Cluster-EAGLE simulations, comparing the projected densities inferred directly from the simulations. We compare the iso-density contours using the procedure of Montes \& Trujillo (2019), and find that the shape of the stellar mass distribution follows that of the total matter even more closely than observed, although their radial profiles differ substantially. The ratio between stellar and total matter density profiles in circular apertures, shows a slope close to -1, with a small dependence on the cluster's total mass. We propose an indirect method to calculate the halo mass and mass density profile from the radial profile of the intra-cluster stellar mass density.
