论文标题
星系簇的分析径向加速关系
The analytic radial acceleration relation for galaxy clusters
论文作者
论文摘要
最近，已经发现了星系中的动力径向加速度与重射径向加速度之间的紧密相关性 - 径向加速关系。这被认为是对修饰的重力理论的间接支持。但是，在星系簇中也可以发现径向加速度关系是否存在争议。在本文中，我们得出并为星系簇中央区域提供了一个分析径向加速关系。我们检查了一些大型星系簇的数据，并发现所得的径向加速关系的散射非常大。此外，尽管星系簇的径向加速度关系显示出与在一定范围的重径径径加速的星系中发现的径向加速度，但它们的功能形式彼此有些不同。这表明径向加速度的关系通常不是普遍关系。
Recently, a tight correlation between the dynamical radial acceleration and the baryonic radial acceleration in galaxies - the radial acceleration relation - has been discovered. This has been claimed as an indirect support of the modified gravity theories. However, whether the radial acceleration relation could also be found in galaxy clusters is controversial. In this article, we derive and present an analytic radial acceleration relation for the central region of galaxy clusters. We examine the data of some large galaxy clusters and we find that the resulting radial acceleration relation has a very large scatter. Moreover, although the radial acceleration relation for galaxy clusters shows some agreement with the one discovered in galaxies for a certain range of baryonic radial acceleration, their functional forms are somewhat different from each other. This suggests that the radial acceleration relation may not be a universal relation in general.
