Astronomy and Astrophysics – Astronomy
Scientific paper
Jan 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991natur.349...45s&link_type=abstract
Nature (ISSN 0028-0836), vol. 349, Jan. 3, 1991, p. 45-47. Research supported by the Canadian Institute for Advanced Research an
Astronomy and Astrophysics
Astronomy
7
Black Holes (Astronomy), Cosmology, Gravitational Collapse, Stellar Rotation, Universe, Energy Dissipation, Gravitational Fields, Inflating, Thermodynamic Properties
Scientific paper
It is shown here how recent developments in the physics of black-hole interiors force a major revision of ideas concerning the final moments of a contracting universe and remove a thermodynamic difficulty which had appeared to rule out any kind of bounce origin for the universe. As the black hole formed by the collapse of a rotating star settles down, it absorbs part of the gravitational radiation emitted during the last moments of collapse. This radiation, strongly blue-shifted near the inner horizon, enormously increases the mass of the black hole's core. External observers cannot detect this mass, but it manifests itself dramatically when the black holes in a collapsing universe merge, a few minutes before the 'big crunch'. The mass of a rebounding universe is enormously inflated, and its specific entropy correspondingly reduced. This allows the expansion to begin from a state of relatively low disorder.
Israel Werner
Sikkema Arnold E.
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