Black holes in vector-tensor theories

Lavinia Heisenberg, Ryotaro Kase, Masato Minamitsuji, Shinji Tsujikawa

研究成果: Article査読

45 被引用数 (Scopus)

抄録

We study static and spherically symmetric black hole (BH) solutions in second-order generalized Proca theories with nonminimal vector field derivative couplings to the Ricci scalar, the Einstein tensor, and the double dual Riemann tensor. We find concrete Lagrangians which give rise to exact BH solutions by imposing two conditions of the two identical metric components and the constant norm of the vector field. These exact solutions are described by either Reissner-Nordström (RN), stealth Schwarzschild, or extremal RN solutions with a non-trivial longitudinal mode of the vector field. We then numerically construct BH solutions without imposing these conditions. For cubic and quartic Lagrangians with power-law couplings which encompass vector Galileons as the specific cases, we show the existence of BH solutions with the difference between two non-trivial metric components. The quintic-order power-law couplings do not give rise to non-trivial BH solutions regular throughout the horizon exterior. The sixth-order and intrinsic vector-mode couplings can lead to BH solutions with a secondary hair. For all the solutions, the vector field is regular at least at the future or past horizon. The deviation from General Relativity induced by the Proca hair can be potentially tested by future measurements of gravitational waves in the nonlinear regime of gravity.

本文言語English
論文番号024
ジャーナルJournal of Cosmology and Astroparticle Physics
2017
8
DOI
出版ステータスPublished - 2017 8月 21
外部発表はい

ASJC Scopus subject areas

  • 天文学と天体物理学

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