Parity-violating gravity and GW170817 in non-Riemannian cosmology

Conroy, A. and Koivisto, T. (2019) Parity-violating gravity and GW170817 in non-Riemannian cosmology. Journal of Cosmology and Astroparticle Physics, 2019 (12). ISSN 1475-7516

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Abstract

The cosmological propagation of tensor perturbations is studied in the context of parity-violating extensions of the symmetric teleparallel equivalent of General Relativity theory. This non-Riemannian formulation allows for a wider variety of consistent extensions than the metric formulation of gravity theory. It is found that while many of the possible quadratic terms do not influence the propagation of the gravitational waves, a generic modification predicts a signature that distinguishes the left- A nd right-handed circular polarizations. The parameters of such modifications can be constrained stringently because the propagation speed of the gravitational waves is scale-dependent and differs from the speed of light. © 2019 IOP Publishing Ltd and Sissa Medialab.

Item Type:
Journal Article
Journal or Publication Title:
Journal of Cosmology and Astroparticle Physics
Uncontrolled Keywords:
/dk/atira/pure/subjectarea/asjc/3100/3103
Subjects:
ID Code:
142564
Deposited By:
Deposited On:
20 Mar 2020 15:30
Refereed?:
Yes
Published?:
Published
Last Modified:
23 Sep 2020 06:03