We carry out a test of the radial acceleration relation (RAR) for a sample of 10 dynamically relaxed and cool-core galaxy clusters imaged by the Chandra X-ray telescope, which was studied in Giles et al. (2016). For this sample, we observe that the best-fit RAR shows a very tight residual scatter equal to 0.09 dex. We obtain an acceleration scale of $1.59\times 10^{-9}$ m/s${}^2$, which is about an order of magnitude higher than that obtained for galaxies. Furthermore, the best-fit RAR parameters differ from those estimated from some of the previously analysed cluster samples, which indicates that the acceleration scale found from the RAR could be of an emergent nature, instead of a fundamental universal scale.

我们对由钱德拉 X 射线望远镜成像的 10 个动态松弛和冷核星系团的样本进行了径向加速度关系 (RAR) 测试，该样本由 Giles 等人研究。(2016)。对于这个样本，我们观察到最适合的 RAR 显示出非常紧密的残余散射，等于 0.09 dex。我们得到一个加速度尺度$1.59\times 10^{-9}$ 小姐${}^2$，这比从星系中获得的高一个数量级。此外，最适合的 RAR 参数与从先前分析的一些集群样本中估计的参数不同，这表明从 RAR 中发现的加速度尺度可能具有紧急性质，而不是基本的通用尺度。