English

Dilatonic dyon-like black hole solutions in the model with two Abelian gauge fields

General Relativity and Quantum Cosmology 2017-04-26 v3

Abstract

Dilatonic black hole dyon-like solutions in the gravitational 4d4d model with a scalar field, two 2-forms, two dilatonic coupling constants λi0\lambda_i \neq 0, i=1,2i =1,2, obeying λ1λ2\lambda_1 \neq - \lambda_2 and the sign parameter ε=±1\varepsilon = \pm 1 for scalar field kinetic term are considered. Here ε=1\varepsilon = - 1 corresponds to a ghost scalar field. These solutions are defined up to solutions of two master equations for two moduli functions, when λi21/2\lambda^2_i \neq 1/2 for ε=1\varepsilon = - 1. Some physical parameters of the solutions are obtained: gravitational mass, scalar charge, Hawking temperature, black hole area entropy and parametrized post-Newtonian (PPN) parameters β\beta and γ\gamma. The PPN parameters do not depend on the couplings λi\lambda_i and ε\varepsilon. A set of bounds on the gravitational mass and scalar charge are found by using a certain conjecture on the parameters of solutions, when 1+2λi2ε>01 +2 \lambda_i^2 \varepsilon > 0, i=1,2i =1,2.

Keywords

Cite

@article{arxiv.1701.02029,
  title  = {Dilatonic dyon-like black hole solutions in the model with two Abelian gauge fields},
  author = {M. E. Abishev and K. A. Boshkayev and V. D. Ivashchuk},
  journal= {arXiv preprint arXiv:1701.02029},
  year   = {2017}
}

Comments

23 pages, Latex, 2 figures, corrected revised version: several paragraphs, remarks, equations and 5 references are added, ref. [13] is replaced. To appear in EPJC. arXiv admin note: substantial text overlap with arXiv:1504.07657