标题： 球对称黑洞在具有Ricci耦合的标量-Gauss-Bonnet引力中的动力学 显示英文标题

标题： The dynamics of spherically symmetric black holes in scalar-Gauss-Bonnet gravity with a Ricci coupling

摘要： 我们研究了在标量高斯-博内重力中球对称黑洞的动力学，该理论中额外引入了标量场与里奇标量之间的耦合，并使用了采用切除技术的非线性模拟。在这个理论类别中，如果黑洞位于特定的质量范围内，它们会具有毛发，在这种情况下，它们表现出有限面积的奇点，这与广义相对论不同。我们的结果表明，里奇耦合可以缓解球对称演化中黑洞初始数据导致的双曲性损失。使用切除可以扩大系统保持良好定义的参数空间，因为可以切除在视界内部形成的椭圆区域。此外，我们探讨了双曲性损失与视界内部有限面积奇点形成之间可能的关系。我们发现从静态分析中提取的奇点位置与声速线的位置非常吻合。最后，当可能时，我们提取了单极准正则模式以及与标量化的线性超光速不稳定性相关的时间尺度。我们还通过利用连续分数分析并假设静态解的线性扰动来验证我们的结果。 显示英文摘要

摘要： We study the dynamics of spherically symmetric black holes in scalar Gauss-Bonnet gravity with an additional coupling between the scalar field and the Ricci scalar using non-linear simulations that employ excision. In this class of theories, black holes possess hair if they lie in a specific mass range, in which case they exhibit a finite-area singularity, unlike general relativity. Our results show that the Ricci coupling can mitigate the loss of hyperbolicity in spherical evolution with black hole initial data. Using excision can enlarge the parameter space for which the system remains well-posed, as one can excise the elliptic region that forms inside the horizon. Furthermore, we explore a possible relation between the loss of hyperbolicity and the formation of the finite-area singularity inside the horizon. We find that the location of the singularity extracted from the static analysis matches the location of the sonic line well. Finally, when possible, we extract the monopolar quasi-normal modes and the time scale of the linear tachyonic instability associated with scalarization. We also check our results by utilizing a continued fraction analysis and supposing linear perturbations of the static solutions.