Constraints on Einstein-aether theory after GW170817
Constraints on Einstein-aether theory after GW170817
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GW170817之后对爱因斯坦以太理论的限制
DOI:
10.1103/physrevd.97.124023
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发表时间:
2018-02
影响因子:
5
通讯作者:
Wang Anzhong
中科院分区:
文献类型:
--
作者:
Oost Jacob;Mukohyama Shinji;Wang Anzhong
In this paper, we carry out a systematic analysis of the theoretical and observational constraints on the dimensionless coupling constants $c_i$ ($i=1,2,3,4$) of the Einstein-aether theory, taking into account the events GW170817 and GRB 170817A. The combination of these events restricts the deviation of the speed of the spin-2 graviton $c_T$ to the range, $- 3\times 10^{-15} < c_T -1 < 7\times 10^{-16}$, which for the Einstein-aether theory implies $\left|c_{13}\right| \le 10^{-15}$ with $c_{13} \equiv c_{1} + c_{3}$. The rest of the constraints are divided into two groups: those on the ($c_1, c_{14}$)-plane and those on the ($c_2, c_{14}$)-plane, where $c_{14}\equiv c_1+c_4$, except for the strong-field constraints. The strong-field constraints depend on the sensitivities $\sigma_{\ae}$ of neutron stars, which are not known at present in the new ranges of the parameters found in this paper.
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