Quadrupolar radiation in de Sitter: displacement memory and Bondi metric

IF 3.6 3区 物理与天体物理 Q2 ASTRONOMY & ASTROPHYSICS
Geoffrey Compère, Sk Jahanur Hoque and Emine Şeyma Kutluk
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引用次数: 0

Abstract

We obtain the closed form expression for the metric perturbation around de Sitter spacetime generated by a matter source below Hubble scale both in generalized harmonic gauge and in Bondi gauge up to quadrupolar order in the multipolar expansion, including both parities (i.e. both mass and current quadrupoles). We demonstrate that such a source causes a displacement memory effect close to future infinity that originates, in the even-parity sector, from a Λ-BMS transition between the two non-radiative regions of future infinity.
德西特中的四极辐射:位移记忆和邦迪度量
我们得到了一个低于哈勃尺度的物质源在德西特时空周围产生的度量扰动的闭式表达,它既是广义谐波轨则的,也是邦迪轨则的,在多极扩展中达到四极阶,包括两个奇偶性(即质量和电流四极)。我们证明,这种物质源会在接近未来无穷大的地方产生位移记忆效应,这种效应在偶偶极部门源自未来无穷大的两个非辐射区域之间的Λ-BMS 转变。
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来源期刊
Classical and Quantum Gravity
Classical and Quantum Gravity 物理-天文与天体物理
CiteScore
7.00
自引率
8.60%
发文量
301
审稿时长
2-4 weeks
期刊介绍: Classical and Quantum Gravity is an established journal for physicists, mathematicians and cosmologists in the fields of gravitation and the theory of spacetime. The journal is now the acknowledged world leader in classical relativity and all areas of quantum gravity.
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