标题： 星系和团的动态在\textit{折射引力} 显示英文标题

标题： Dynamics of galaxies and clusters in \textit{refracted gravity}

摘要： 我们研究了\textit{折射引力}的概念验证及其意义，这是一种新的修改引力理论，旨在在不借助暗物质的情况下解决宇宙结构的发光质量和动力学质量之间的差异。 受物质中电场行为的启发，折射引力引入了一个依赖于局部质量密度的引力介电常数，并修改了标准泊松方程。 由此产生的引力场可以比牛顿引力场更强，并能模拟暗物质的存在。 我们证明，折射引力场正确描述了（1）盘状星系的旋转曲线和提尔费希关系；以及（2）星系团中 X 射线气体的观测温度分布。 根据这些有希望的结果，我们认为折射引力值得进一步研究。 显示英文摘要

摘要： We investigate the proof of concept and the implications of \textit{refracted gravity}, a novel modified gravity aimed to solve the discrepancy between the luminous and the dynamical mass of cosmic structures without resorting to dark matter. Inspired by the behavior of electric fields in matter, refracted gravity introduces a gravitational permittivity that depends on the local mass density and modifies the standard Poisson equation. The resulting gravitational field can become more intense than the Newtonian field and can mimic the presence of dark matter. We show that the refracted gravitational field correctly describes (1) the rotation curves and the Tully-Fisher relation of disk galaxies; and (2) the observed temperature profile of the X-ray gas of galaxy clusters. According to these promising results, we conclude that refracted gravity deserves further investigation.