arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2005.07650gr-qchep-th
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Einstein-scalar-Gauss-Bonnet理论中超紧类粒子解的性质

Properties of ultra-compact particle-like solutions in Einstein-scalar-Gauss-Bonnet theories

Burkhard Kleihaus, Jutta Kunz, Panagiota Kanti

摘要:

除了标量化的黑洞和虫洞,爱因斯坦-标量-高斯-邦纳理论也允许粒子类的解决方案。这些类粒子解的标量场在原点发散,类似于库仑势在带电粒子位置的发散。然而,这些类粒子解具有全局正则度量,并且它们的有效应力能量张量也没有病态。我们确定了一些爱因斯坦-标量-高斯-邦纳理论中的粒子类解的存在域,考虑到声子和幂律耦合函数,我们分析了解决方案的物理性质。有趣的是,这些解可能拥有成对的轻链,因此代表超紧凑的物体。我们确定这些光的位置,并研究在引力波谱的回波发生的有效潜力。我们还解决了这些粒子的解决方案,各自的虫洞和黑洞解的关系,并澄清限制程序恢复Fisher解决方案(也称为Janis-Newman-Winicourt-Wyman解决方案)。

英文摘要:

Besides scalarized black holes and wormholes, Einstein-scalar-Gauss-Bonnet theories allow also for particle-like solutions. The scalar field of these particle-like solutions diverges at the origin, akin to the divergence of the Coulomb potential at the location of a charged particle. However, these particle-like solutions possess a globally regular metric, and their effective stress energy tensor is free from pathologies, as well. We determine the domain of existence for particle-like solutions in a number of Einstein-scalar-Gauss-Bonnet theories, considering dilatonic and power-law coupling functions, and we analyze the physical properties of the solutions. Interestingly, the solutions may possess pairs of lightrings, and thus represent ultra-compact objects. We determine the location of these lightrings, and study the effective potential for the occurrence of echoes in the gravitational-wave spectrum. We also address the relation of these particle-like solutions to the respective wormhole and black-hole solutions, and clarify the limiting procedure to recover the Fisher solution (also known as Janis-Newman-Winicourt-Wyman solution).

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