论文标题
巨型低表面亮度矮星系作为改良重力的测试台
Giant low-surface-brightness dwarf galaxy as a test bench for MOdified Gravity
论文作者
论文摘要
缺乏超对称颗粒的检测导致观察用于解释暗物质效应的替代途径。其中，即使对于标准宇宙学模型中所需的两个黑暗组件，修改的重力理论也可能会占重要作用。已经提出了标量调整矢量重力理论来解决暗物质难题。这种修饰的重力模型在其弱场极限中引入了Yukawa样的校正牛顿电位，并能够解释出星系和星系簇的大规模与暗物质有关的大多数现象学。然而，当研究被认为是暗物质的系统（例如矮星系）时，出现了一些不一致之处。从这个意义上讲，Antlia II是一种极度弥漫性的星系，最近在{\ em Gaia}的第二个数据发布中发现，可以用来探测上述理论，以不需要调用暗物质。我们的分析表明，几个不一致之处，并导致认为修改的重力可能无法阐明暗物质的有趣性质。
The lack of detection of supersymmetric particles is leading to look at alternative avenues for explaining dark matter's effects. Among them, modified theories of gravity may play an important role accounting even for both dark components needed in the standard cosmological model. Scalar-Tensor-Vector Gravity theory has been proposed to resolve the dark matter puzzle. Such a modified gravity model introduces, in its weak field limit, a Yukawa-like correction to the Newtonian potential, and is capable to explain most of the phenomenology related to dark matter at scale of galaxies and galaxy clusters. Nevertheless, some inconsistencies appears when studying systems that are supposed to be dark matter dominated such as dwarf galaxies. In this sense Antlia II, an extremely diffuse galaxy which has been recently discovered in {\em Gaia}'s second data release, may serve to probe the aforementioned theory against the need for invoking dark matter. Our analysis shows several inconsistencies and leads to argue that MOdified Gravity may not be able to shed light on the intriguing nature of dark matter.
