Accretion of nonminimally coupled scalar fields into black holes

Details Accretion of nonminimally coupled scalar fields into black holes Accretion of nonminimally coupled scalar fields into black holes

2009-09-16

arxiv.org/abs/0909.3033v2

Phys.Rev.D80:104018,2009

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

6 pages, final version to appear in PRD

Scientific paper

10.1103/PhysRevD.80.104018

By using a quasi-stationary approach, we consider the mass evolution of Schwarzschild black holes in the presence of a nonminimally coupled cosmological scalar field. The mass evolution equation is analytically solved for generic coupling, revealing a qualitatively distinct behavior from the minimal coupling case. In particular, for black hole masses smaller than a certain critical value, the accretion of the scalar field can lead to mass decreasing even if no phantom energy is involved. The physical validity of the adopted quasi-stationary approach and some implications of our result for the evolution of primordial and astrophysical black holes are discussed. More precisely, we argue that black hole observational data could be used to place constraints on the nonminimally coupled energy content of the universe.

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