发表机构
Lanzhou University（兰州大学）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
本研究通过数值相对论模拟，发现动态黑洞标量化过程中标量毛的生长会破坏初始稳定圆轨道，使其变为偏心轨道或坠入黑洞，为标量场与黑洞动力学相互作用及引力波观测提供新见解。
AI 中文摘要
动态黑洞标量化描述了“无毛”黑洞向标量化有毛状态转变的过程。这一转变显著改变了时空几何，包括测试粒子稳定圆轨道的结构，而这些轨道对于天体物理观测和引力检验至关重要。在本工作中，我们采用数值相对论模拟来建模经历标量化的真空黑洞的时变演化。通过在动态变化的时空背景下演化类时测地线方程，我们研究了标量化过程如何影响初始稳定的圆轨道。我们的结果表明，标量毛的生长破坏了这些轨道的圆性质，迫使它们要么变为偏心轨道，要么坠入黑洞。这种轨道失稳源于标量场引起的时空曲率快速变化。我们的发现为标量场与黑洞动力学之间的相互作用提供了新颖见解，对引力波信号、吸积盘稳定性以及扩展引力理论的观测检验具有重要意义。
英文摘要
Dynamical black hole scalarization describes the process by which a ``no-hair" black hole transitions to a scalarized hairy state. This transition significantly alters the spacetime geometry, including the structure of stable circular orbits of the test particles, which are critical for astrophysical observations and tests of gravity. In this work, we employ numerical relativity simulations to model the time-dependent evolution of a vacuum black hole undergoing scalarization. By evolving timelike geodesic equations within the dynamically changing spacetime background, we investigate how the scalarization process impacts initially stable circular orbits. Our results reveal that the growth of the scalar hair destroys the circular nature of these orbits, forcing them to either become eccentric or plunge into the black hole. This orbital destabilization arises from the rapid change of spacetime curvature induced by the scalar field. Our findings provide novel insights into the interplay between scalar fields and black hole dynamics, with significant implications for gravitational-wave signatures, accretion disk stability, and observational tests of extended theories of gravity.
Comments10 pages, 8 figures
