2024-03-28T10:15:05Z
https://nagoya.repo.nii.ac.jp/oai
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2023-01-16T04:50:24Z
1924:1925:1926
Generalized framework for testing gravity with gravitational-wave propagation. II. Constraints on Horndeski theory
Arai, Shun
85276
Nishizawa, Atsushi
85277
Gravitational waves (GW) are generally affected by modification of a gravity theory during propagation at cosmological distances. We numerically perform a quantitative analysis on Horndeski theory at the cosmological scale to constrain the Horndeski theory by GW observations in a model-independent way. We formulate a parametrization for a numerical simulation based on the Monte Carlo method and obtain the classification of the models that agrees with cosmic accelerating expansion within observational errors of the Hubble parameter. As a result, we find that a large group of the models in the Horndeski theory that mimic cosmic expansion of the ΛCDM model can be excluded from the simultaneous detection of a GW and its electromagnetic transient counterpart. Based on our result and the latest detection of GW170817 and GRB170817A, we conclude that the subclass of Horndeski theory including arbitrary functions G4 and G5 can hardly explain cosmic accelerating expansion without fine-tuning.
journal article
American Physical Society
2018-05-22
application/pdf
Physical Review D
10
97
104038
2470-0010
2470-0029
https://nagoya.repo.nii.ac.jp/record/26364/files/PhysRevD97_104038.pdf
eng
https://doi.org/10.1103/PhysRevD.97.104038
© 2018 American Physical Society