Post-Newtonian analysis of regularized 4D Einstein-Gauss-Bonnet theory: Complete set of PPN parameters and observational constraints

被引：1
作者：
Toniato, Junior D. [1 ,2 ]
Richarte, Martin G. [3 ,4 ,5 ]
机构：
[1] Univ Fed Espirito Santo, Ctr Ciencias Exatas Nat & Saude, Dept Quim & Fis, Campus Alegre, BR-29500000 Alegre, ES, Brazil
[2] Univ Fed Espirito Santo, Nucleo Astrofis & Cosmol Cosmo Ufes, BR-29075910 Vitoria, ES, Brazil
[3] Univ Fed Espirito Santo, Dept Fis, BR-29075910 Vitoria, ES, Brazil
[4] Univ Fed Espirito Santo, PPGCosmo, CCE, BR-29075910 Vitoria, ES, Brazil
[5] Univ Buenos Aires, Fac Ciencias Exactas Nat, Dept Fis, Ciudad Univ 1428,Pabellon 1, RA-1428 Buenos Aires, Argentina
来源：
PHYSICAL REVIEW D | 2024年 / 109卷 / 10期
关键词：
COSMOLOGICAL CONSTANT; MODIFIED GRAVITY; DARK ENERGY;
D O I：
10.1103/PhysRevD.109.104068
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We performed a post-Newtonian analysis of the regularized four-dimensional Einstein-Gauss-Bonnet gravitational theory. The resulting metric differs from the classical parametrized post-Newtonian (PPN) formalism in that a new gravitational potential arises from the integration of the approximate field equations. We also investigated the conserved quantities and equations of motion for massive bodies and light rays to a certain degree. By computing the predicted periastron advance rate in a binary system, we obtained an observational constraint that is stronger than those of previous analyses. Although the usual 10 PPN parameters can still be derived within the PPN framework, an extra parameter is needed to account for the full post-Newtonian tests.
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页数：14
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