论文标题
Galaxy簇的径向加速关系的另一个测试
Yet another test of Radial Acceleration Relation for galaxy clusters
论文作者
论文摘要
我们对文献中两个不同目录的星系簇进行了径向加速关系（RAR）的测试，作为最近两项最近分析的独立交叉检查，这些分析得出了相反的结论。我们考虑的数据集包括12个集群的Chandra样品和12个簇的X-Cop样品。对于两个样品，我们发现残留散射很小（0.11-0.14 dex），尽管钱德拉样品的最佳拟合值具有较大的误差线。因此，我们认为这些簇样品中至少有一个（X-COP）遵守径向加速度的关系。但是，由于最佳拟合参数彼此之间以及先前的估计值差异，因此我们认为RAR不是通用的。对于两个目录，我们获得的加速度量表大约比星系获得的加速度大于一个数量级，并且与最近的两个估计值一致。
We carry out a test of the radial acceleration relation (RAR) for galaxy clusters from two different catalogs compiled in literature, as an independent cross-check of two recent analyses, which reached opposite conclusions. The datasets we considered include a Chandra sample of 12 clusters and the X-COP sample of 12 clusters. For both the samples, we find that the residual scatter is small (0.11-0.14 dex), although the best-fit values for the Chandra sample have large error bars. Therefore, we argue that at least one of these cluster samples (X-COP) obeys the radial acceleration relation. However, since the best-fit parameters are discrepant with each other as well as the previous estimates, we argue that the RAR is not universal. For both the catalogs, the acceleration scale, which we obtain is about an order of magnitude larger than that obtained for galaxies, and is agreement with both the recent estimates.
