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arXiv · 1104.1908

Stability analysis of f(R)-AdS black holes

Taeyoon Moon·Yun Soo Myung·Edwin J. Son
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Abstract

We study the stability of f(R)-AdS (Schwarzschild-AdS) black hole obtained from f(R) gravity. In order to resolve the difficulty of solving fourth order linearized equations, we transform f(R) gravity into the scalar-tensor theory by introducing two auxiliary scalars. In this case, the linearized curvature scalar becomes a dynamical scalaron, showing that all linearized equations are second order. Using the positivity of gravitational potentials and S-deformed technique allows us to guarantee the stability of f(R)-AdS black hole if the scalaron mass squared satisfies the Breitenlohner-Freedman bound. This is confirmed by computing quasinormal frequencies of the scalaron for large f(R)-AdS black hole.

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Taeyoon Moon, Yun Soo Myung, Edwin J. Son. 2011-10-06. Stability analysis of f(R)-AdS black holes. https://doi.org/10.1140/epjc%2Fs10052-011-1777-0

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