Scalar-Tensor Black Holes Embedded in an Expanding Universe

Abstract

Abstract:In this review, we focus our attention on scalar-tensor gravity models and their empirical verification in terms of black hole and wormhole physics. We focus on black holes, embedded in an expanding universe, describing both cosmological and astrophysical scales. We show that in scalar-tensor gravity it is quite common that the local geometry is isolated from the cosmological expansion, so that it does not backreact on the black hole metric. We try to extract common features of scalar-tensor black holes in an expanding universe and point out the issues that are not fully investigated.

Embedding Black Holes and Other Inhomogeneities in the Universe in Various Theories of Gravity: A Short Review

“…Nevertheless, a complete review would be too long 5 and a somewhat arbitrary selection needs to be made, but the geometries appearing most often in the literature are reported below. For extra discussion of cosmological black holes in alternative gravity see [122,69,45,130].…”

Horndeski gravity without screening in binary pulsars

“…Therefore during last few years in connection with all these circumstances, the Horndeski gravity attracts a large number of researchers. This theory has recently been studied extensively in the context of cosmology (Germani & Martin-Moruno 2017; Kennedy, Lombriser & Taylor 2017; Nunes, Martn-Moruno & Lobo 2017) and physics of black holes (Tretyakova 2017;Tretyakova & Latosh 2018). Taking into account the generality and importance of Horndeski model, it is natural to ask how this theory pass different experimental gravitational tests and impose restrictions on its parameters.…”

Exact cosmological black hole solutions in scalar tensor vector gravity

“…The McVittie metric and its generalization have been widely studied through the years (see for instance the works by Faraoni and Jacques [33] and Carrera and Giulini [34]). The investigation of such solutions has transcended GR to encompass alternative theories of gravitation [35]. The results of the studies of inhomogeneous spacetimes have direct astrophysical implications: a cosmological force acting on large scales can modify the structure of galaxies and clusters of galaxies, and inhibit accretion processes.…”