Approximate black holes from a variable cosmological constant

Details Approximate black holes from a variable cosmological constant Approximate black holes from a variable cosmological constant

1998-02-02

arxiv.org/abs/gr-qc/9802004v2

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

3 pages,latex,2 figures; corrected typos and existence proof

Scientific paper

The small or zero cosmological constant, $\Lambda$, probably results from a macroscopic cancellation mechanism of the zero-point energies. However, nearby horizon surfaces any macroscopic mechanism is expected to result in imperfect cancellations. A phenomenological description is given for the residual variable cosmological constant. In the static, spherically symmetric case it produces approximate black holes. The model describes the case of exponential decay by $\Box\ln\Lambda=-3a$, were $a$ is a positive constant.

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