Scalar gravitational radiation from binaries: Vainshtein mechanism in time-dependent systems

Scalar gravitational radiation from binaries: Vainshtein mechanism in time-dependent systems
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双星的标量引力辐射:依时系统中的 Vainshtein 机制

DOI:
10.1088/1361-6382/aaf5e8
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发表时间:
2019
影响因子:
3.5
通讯作者:
Tolley, Andrew J
Tolley, Andrew J
中科院分区:
物理与天体物理3区
文献类型:
--
作者:
Dar, Furqan;de Rham, Claudia;Deskins, J Tate;Giblin, John T;Tolley, Andrew J

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我们开发了一个完整的四维数值代码来研究标量引力辐射从二进制系统和探测Vainshtein机制的情况下,打破静态和球对称性,相关的二进制恒星以及黑洞和中子星双星。本研究的重点是立方Galileon出现的大规模引力理论的去耦限制。与数值方法相关的限制,使我们无法达到一个物理上现实的层次结构的尺度,然而,在这种情况下,我们观察到相同的功率定律缩放的辐射功率作为以前的分析估计,并确认一个强大的抑制发射的功率在偶极子和偶极子相比,四极辐射。在更接近物理现实参数的趋势下,我们证实了标量引力辐射中发射的功率的抑制和广义相对论的恢复具有良好的精度。这为未来的数值工作铺平了道路,探索更通用的,物理相关的情况和可能表现出Vainshtein机制的相互作用集。
We develop a full four-dimensional numerical code to study scalar gravitational radiation emitted from binary systems and probe the Vainshtein mechanism in situations that break the static and spherical symmetry, relevant for binary pulsars as well as black holes and neutron stars binaries. The present study focuses on the cubic Galileon which arises as the decoupling limit of massive theories of gravity. Limitations associated with the numerical methods prevent us from reaching a physically realistic hierarchy of scales; nevertheless, within this context we observe the same power law scaling of the radiated power as previous analytic estimates, and confirm a strong suppression of the power emitted in the monopole and dipole as compared with quadrupole radiation. Following the trend to more physically realistic parameters, we confirm the suppression of the power emitted in scalar gravitational radiation and the recovery of general relativity with good accuracy. This paves the way for future numerical work, probing more generic, physically relevant situations and sets of interactions that may exhibit the Vainshtein mechanism.
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