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arXiv 2602.02650gr-qc
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爱因斯坦-标量-高斯-博内引力中黑洞双星的动力学毛发增长

Dynamical hair growth in black hole binaries in Einstein-scalar-Gauss-Bonnet gravity

SISSA(的里雅斯特国际高等研究学院);INFN Sezione di Trieste(意大利国家核物理研究所的里雅斯特分部);IFPU - Institute for Fundamental Physics of the Universe(宇宙基础物理研究所);Dipartimento di Fisica, Sapienza Università di Roma(罗马第一大学物理系);Instituut voor Theoretische Fysica, KU Leuven(荷鲁芬大学理论物理研究所);Leuven Gravity Institute, KU Leuven(荷鲁芬大学引力研究所);Departament d’Astronomia i Astrofísica, Universitat de València(瓦伦西亚大学天文与天体物理学系);Theoretical Astrophysics, Eberhard Karls University of Tübingen(蒂宾根大学理论天体物理学);Department of Theoretical Physics, Faculty of Physics, Sofia University(索非亚大学物理学院理论物理系);Institute of Mathematics and Informatics, Bulgarian Academy of Sciences(保加利亚科学院数学与信息学研究所)

Lodovico Capuano, Llibert Aresté Saló, Daniela D. Doneva, Stoytcho S. Yazadjiev, Enrico Barausse

AI总结:

在爱因斯坦-标量-高斯-博内引力中,双黑洞在临界轨道间距时会发生动力学标量化,通过绝热总Wald熵守恒的半解析模型和数值模拟研究标量电荷演化,发现该效应可能被第三代引力波探测器观测到。

摘要:

在标量-张量引力理论的框架内,某些模型可以规避经典黑洞无毛定理。一个著名的例子是爱因斯坦-标量-高斯-博内引力,其中可以存在携带标量电荷的黑洞。我们发现,在这个理论中,最初由广义相对论描述的双黑洞一旦达到临界轨道间距(“动力学标量化”),就会获得标量电荷。我们基于总Wald熵的绝热守恒,开发了一个简单的半解析模型来估计双星旋进过程中的标量电荷演化。我们还对不同构型进行了完全非线性的数值相对论模拟,结果一致。我们还计算了爱因斯坦-标量-高斯-博内引力和广义相对论波形之间的引力波相位差,用于评估可探测性。我们发现,在理论的维度耦合的一个狭窄范围内,几乎等质量的双黑洞合并中,动力学标量化可能被第三代地面引力波探测器观测到。

英文摘要:

Within the framework of scalar-tensor theories of gravity, certain models can evade classical black hole no-hair theorems. A well-known example is Einstein-scalar-Gauss-Bonnet gravity, where black holes carrying a scalar charge can exist. We find that, within this theory, binary black holes initially described by General Relativity can acquire scalar charges once they reach a critical orbital separation ("dynamical scalarization"). We develop a simple semi-analytic model, based on the adiabatic conservation of the total Wald entropy, to estimate the scalar charge evolution during the binary inspiral. We also run fully nonlinear numerical-relativity simulations for different configurations, finding consistent results. The gravitational-wave phase difference between Einstein-scalar-Gauss-Bonnet and General Relativity waveforms, which we use to assess detectability, is also computed. We find that dynamical scalarization might be observable in nearly equal-mass binary black hole mergers with third-generation ground-based gravitational-wave detectors, in a narrow range of the dimensional coupling of the theory.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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