Scalarized black hole dynamics in Einstein-dilaton-Gauss-Bonnet gravity
Scalarized black hole dynamics in Einstein-dilaton-Gauss-Bonnet gravity
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DOI：
10.1103/physrevd.101.044015
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发表时间：
2019-11
影响因子：
5
通讯作者：
Justin L. Ripley;F. Pretorius
中科院分区：
文献类型：
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作者：
Justin L. Ripley;F. Pretorius
本文报道了在完全动力学理论下，在爱因斯坦-高斯-邦内引力场中标量化黑洞的稳定性的数值研究，但仅限于球对称。我们发现的证据表明，足够小的曲率耦合的标量黑洞的解决方案是非线性稳定的。对于这样小的耦合，我们表明，椭圆形区域内形成这些EdGB黑洞时空（之前的任何曲率奇异性），并给出证据，该区域仍然审查从渐近的观点。然而，对于相对于给定黑洞质量的耦合值“超极值”，在视界外部形成椭圆区域，这意味着外部柯西问题在该区域是不适定的。
We report on a numerical investigation of the stability of scalarized black holes in Einstein dilaton Gauss-Bonnet (EdGB) gravity in the full dynamical theory, though restricted to spherical symmetry. We find evidence that for sufficiently small curvature-couplings the resulting scalarized black hole solutions are nonlinearly stable. For such small couplings, we show that an elliptic region forms inside these EdGB black hole spacetimes (prior to any curvature singularity), and give evidence that this region remains censored from asymptotic view. However, for coupling values "superextremal" relative to a given black hole mass, an elliptic region forms exterior to the horizon, implying the exterior Cauchy problem is ill-posed in this regime.