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arXiv 1808.00632gr-qchep-phhep-th
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GW170817后Hoenava引力波和偏振

Gravitational waves and the polarizations in Hořava gravity after GW170817

Yungui Gong, Shaoqi Hou, Eleftherios Papantonopoulos, Dimitrios Tzortzis

摘要:

本文讨论了Hoelava引力的引力波、偏振态及其可能的观测特征。利用规范不变变量理论,我们发现了由该理论所包含的三个物理自由度激发的霍拉瓦引力中的三个偏振模。特别地,标量自由度激发横向呼吸和纵向偏振的混合。考虑到以前的实验观测的约束,特别是包括从GW170817和GRB 170817A的观测的速度界限。有人发现,Hoelava理论是高度约束。在实验允许的参数空间内,我们研究了脉冲星定时阵列和盖亚任务是否可以用来区分不同的偏振。通过计算光子红移与天体测量位置之间的交叉关联函数,得出利用脉冲星计时阵列和Gaia任务判断是否存在标量偏振是可能的结论。

英文摘要:

The gravitational waves of Hořava gravity, their polarization states and their possible observational signatures are discussed. Using the gauge-invariant variable formalism, we found the three polarization modes in Hořava gravity excited by the three physical degrees of freedom contained in this theory. In particular, the scalar degree of freedom excites a mix of the transverse breathing and the longitudinal polarizations. The constraints from the previous experimental observations are taken into account, especially including the speed bound from the observations of GW170817 and GRB 170817A. It was found that Hořava theory is highly constrained. Within the experimentally allowed parametric space, we studied whether the pulsar timing arrays and the Gaia mission can be used to distinguish the different polarizations. After calculating the cross-correlation functions between the redshifts of photons and the astrometric positions of stars, one concludes that it is possible to tell whether there exits the scalar polarization using pulsar timing arrays and the Gaia mission.

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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