Black Chaplygin universes connected by a wormhole


Presenting author: Vladimir Popov

Black Chaplygin universes connected by a wormhole Einstein equations admit exact solutions describing regular black holes where a singularity is replaced with a cosmological expansion and which therefore were called black universes. Such objects can be supported by phantom matter and could arise from a collapse in another ambient universe. A similar structure with an anisotropic Chaplygin fluid are considered here. The space-time has a static spherically symmetric region with a wormhole surrounding by two horizons. Non-static regions are behind each horizon. The metric in the non-static regions represents a kind of an anisotropic Kantowski?Sachs cosmological model. Its evolution starts from the horizon and develops according to different scenarios including eternal expansion, contraction and also a finite lifetime. There is a scenario with a de Sitter regime, which can be recognized as model for the initial inflation.