2024-03-29T13:46:46Z
https://nagoya.repo.nii.ac.jp/oai
oai:nagoya.repo.nii.ac.jp:00027916
2023-01-16T04:50:30Z
1924:1925:1926
Parity-violating gravity and GW170817
Nishizawa, Atsushi
Kobayashi, Tsutomu
open access
© 2018 American Physical Society
We consider gravitational waves (GWs) in generic parity-violating gravity, including recently proposed ghost-free theories with parity violation as well as Chern-Simons (CS) modified gravity, and study the implications of observational constraints from GW170817/GRB 170817A. Whereas GWs propagate at the speed of light, c, in CS gravity, we point out that this is specific to CS gravity and the GW propagation speed deviates from c, in general, in parity-violating gravity. Therefore, contrary to the previous literature in which only CS gravity is studied as a concrete example, we show that GW170817/GRB 170817A can, in fact, be used to limit gravitational parity violation. Our argument implies that the constraint on the propagation speed of GWs can pin down the parity-violating sector, if any, to CS gravity.
American Physical Society
2018-12-15
eng
journal article
VoR
http://hdl.handle.net/2237/00030115
https://nagoya.repo.nii.ac.jp/records/27916
https://doi.org/10.1103/PhysRevD.98.124018
2470-0010
2470-0029
Physical Review D
98
12
124018
https://nagoya.repo.nii.ac.jp/record/27916/files/PhysRevD98_124018.pdf
application/pdf
151.5 kB
2019-05-08