Tolman-Bondi collapse in scalar-tensor theories as a probe of gravitational memory

Details Tolman-Bondi collapse in scalar-tensor theories as a probe of gravitational memory Tolman-Bondi collapse in scalar-tensor theories as a probe of gravitational memory

Nov 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002phrvd..66j4023h&link_type=abstract

Physical Review D, vol. 66, Issue 10, id. 104023

Mathematics

Logic

14

Classical Black Holes, Gravity In More Than Four Dimensions, Kaluza-Klein Theory, Unified Field Theories, Alternative Theories Of Gravity, Black Holes, Particle-Theory And Field-Theory Models Of The Early Universe

Scientific paper

In cosmological models with a varying gravitational constant, it is not clear whether primordial black holes preserve the value of G at their formation epoch. We investigate this question by using the Tolman-Bondi model to study the evolution of a background scalar field when a black hole forms from the collapse of dust in a flat Friedmann universe. Providing the back reaction of the scalar field on the metric can be neglected, we find that the value of the scalar field at the event horizon very quickly assumes the background cosmological value. This suggests that there is very little gravitational memory.

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