Mass inflation in Brans-Dicke gravity
- Departamento de Fisica da Faculdade de Ciencias da, Universidade do Porto and Centro de Fisica do Porto, Rua do Campo Alegre 687, 4169-007 Porto (Portugal)
- JILA and Department Astrophysical and Planetary Sciences, Box 440, University of Colorado, Boulder, Colorado 80309 (United States)
A detailed nonlinear analysis of the internal structure of spherical, charged black holes that are accreting scalar matter is performed in the framework of the Brans-Dicke theory of gravity. We choose the lowest value of the Brans-Dicke parameter that is compatible with observational constraints. First, the homogeneous approximation is used. It indicates that mass inflation occurs and that the variations of the Brans-Dicke scalar inside the black hole, which could in principle be large in the absence of mass inflation, become small when mass inflation does occur. Then, a full nonlinear numerical study of the black hole interior perturbed by a self-gravitating massless uncharged scalar field is performed. We use an algorithm with adaptive mesh refinement capabilities. In this way, the changes in the internal structure of the black hole caused by mass inflation are determined, as well as the induced variations of the Brans-Dicke scalar, confirming, qualitatively, the indications given by the homogeneous approximation.
- OSTI ID:
- 21301004
- Journal Information:
- Physical Review. D, Particles Fields, Vol. 79, Issue 12; Other Information: DOI: 10.1103/PhysRevD.79.124045; (c) 2009 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2821
- Country of Publication:
- United States
- Language:
- English
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