Generalized McVittie geometry in Horndeski gravity with matter
Generalized McVittie geometry in Horndeski gravity with matter
复制标题
Horndeski 物质引力中的广义 McVittie 几何
作者：
Marcello Miranda;D. Vernieri;S. Capozziello;V. Faraoni
我们调查McVittie和广义McVittie解决方案Horndeski重力与空间均匀的引力标量场，这是隐形在小尺度附近的中心对象，但在大尺度上，源FLRW宇宙中的中心不均匀性嵌入。与以往的研究不同，我们包括物质，并获得广义McVittie解决方案的扩展cuscuton模型。根据引力耦合的时间依赖性、径向能量流、中心物体的吸积速率和哈勃速率，对可能的构型进行了艾德分类。
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.
影响因子：
8.6
作者：
Abbott, B. P.;Abbott, R.;Zweizig, J.
通讯作者：
Zweizig, J.