论文标题
霍尼德斯基重力的广义麦维蒂几何形状与物质
Generalized McVittie geometry in Horndeski gravity with matter
论文作者
论文摘要
我们研究了McVittie和广义的McVittie解决方案，用于Horndeski重力，并具有空间均匀的重力标量场，该量表在中心物体附近的小尺度上是隐形的，但是在大尺度上，嵌入了中央异构性的FLRW宇宙。与以前的研究不同，我们包括物质并在扩展的Cuscuton模型中获得广义的McVittie解决方案。根据引力耦合的时间依赖性，径向能流，积聚速率和哈勃速率对可能的构型进行分类。
We investigate McVittie and generalized McVittie solutions for Horndeski gravity with a spatially homogeneous gravitational scalar field, which is stealth at small scales near the central object but, at large scales, sources the FLRW universe in which the central inhomogeneity is embedded. Unlike previous studies, we include matter and obtain generalized McVittie solutions in the extended cuscuton model. The possible configurations are classified according to the time-dependence of the gravitational coupling, the radial energy flow, the accretion rate onto the central object, and the Hubble rate.
