Black holes in closed universes

Details Black holes in closed universes Black holes in closed universes

Aug 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988stin...8927610q&link_type=abstract

Presented at the 5th Marcel Grossman Meeting, Perth, Australia, 8-13 Aug. 1988

Astronomy and Astrophysics

Astronomy

Astronomical Models, Black Holes (Astronomy), Cosmology, Universe, Mathematical Models, Singularity (Mathematics)

Scientific paper

Black holes are usually defined in the context of asymptotically flat spacetimes. In order to demonstrate that the black hole and big crunch singularities are essentially part and parcel of the same singularity, cut-and-paste methods were used to construct models in which the black hole was embedded in a closed cosmology. The variation of the properties of the model with initial conditions is investigated. The problem, that there is no longer an observer at infinity (as a ready reference to define the black hole), is overcome by using a foliation of constant mean extrinsic curvature to define the preferred observer at every point.

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