Hair loss in parity violating gravity

Hair loss in parity violating gravity
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违反重力的胎次脱发

DOI:
10.1088/1361-6382/ab0eed
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发表时间:
2019
影响因子:
3.5
通讯作者:
Bieri, Lydia
Bieri, Lydia
中科院分区:
物理与天体物理3区
文献类型:
--
作者:
Wagle, Pratik;Yunes, Nicolás;Garfinkle, David;Bieri, Lydia

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最近LIGO/VIRGO合作探测到的引力波,使得爱因斯坦理论在极端引力状态下的首次测试成为可能,在极端引力状态下,引力相互作用同时是强的,非线性的和动态的。其中一个测试是关于双星系统螺旋上升的速率,或者说引力波频率增加的速率,这可以限制多毛黑洞的存在。这是因为具有标量毛发的黑洞通常会激发偶极辐射,这反过来又会导致更快的衰减速率和频率啁啾。在本文中,我们提出了数学证明,标量头发不是来源于静止的,渐近平坦的,和轴对称的时空,包括那些适合恒星和黑洞,当考虑扩展爱因斯坦的理论,打破奇偶引力,专注于动态陈-西蒙斯理论作为一个特殊的玩具模型。这一结果意味着,目前对吸积黑洞系统或双星系统的电磁观测不能约束今天引力的宇称破坏。
The recent detection of gravitational waves by the LIGO/VIRGO collaboration has allowed for the first tests of Einstein's theory in the extreme gravity regime, where the gravitational interaction is simultaneously strong, non-linear and dynamical. One such test concerns the rate at which the binaries inspiral, or equivalently the rate at which the gravitational wave frequency increases, which can constrain the existence of hairy black holes. This is because black holes with scalar hair typically excite dipole radiation, which in turn leads to a faster decay rate and frequency chirping. In this paper, we present mathematical proofs that scalar hair is not sourced in stationary, asymptotically flat, and axisymmetric spacetimes, including those appropriate to stars and black holes, when considering extensions of Einstein's theory that break parity in gravity, focusing on dynamical Chern–Simons theory as a particular toy model. This result implies that current electromagnetic observations of accreting black hole systems or of binary pulsars cannot constrain parity violation in gravity today.
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