# On gauge invariant cosmological perturbations in UV-modified Hořava gravity

@article{Shin2017OnGI, title={On gauge invariant cosmological perturbations in UV-modified Hořava gravity}, author={Sunyoung Shin and Mu-In Park}, journal={Journal of Cosmology and Astroparticle Physics}, year={2017}, volume={2017}, pages={033 - 033} }

We consider gauge invariant cosmological perturbations in UV-modified, z = 3 (non-projectable) Hořava gravity with one scalar matter field, which has been proposed as a renormalizable gravity theory without the ghost problem in four dimensions. In order to exhibit its dynamical degrees of freedom, we consider the Hamiltonian reduction method and find that, by solving all the constraint equations, the degrees of freedom are the same as those of Einstein gravity: one scalar and two tensor…

## 9 Citations

### Birkhoff’s theorem in Hořava gravity

- PhysicsPhysical Review D
- 2019

We study Birkhoff’s theorem, which states the absence of time-dependent and spherically symmetric vacuum solutions in four-dimensional Hořava gravity, which has been proposed as a renormalizable…

### Charged throats in the Hořava–Lifshitz theory

- PhysicsThe European Physical Journal C
- 2021

A spherically symmetric solution of the field equations of the Hořava–Lifshitz gravity–gauge vector interaction theory is obtained and analyzed. It describes a charged throat. The solution exists…

### Pure electromagnetic-gravitational interaction in Hořava–Lifshitz theory at the kinetic conformal point

- PhysicsThe European Physical Journal C
- 2020

We introduce the electromagnetic-gravitational coupling in the Hořava–Lifshitz framework, in $$3+1$$ 3 + 1 dimensions, by considering the Hořava–Lifshitz gravity theory in $$4+1$$ 4 + 1 dimensions at…

### Wave zone in the Hořava–Lifshitz theory at the kinetic-conformal point in the low energy regime

- PhysicsThe European Physical Journal C
- 2021

We show that in the Hořava–Lifshitz theory at the kinetic-conformal point, in the low energy regime, a wave zone for asymptotically flat fields can be consistently defined. In it, the physical…

### Anisotropic coupling of gravity and electromagnetism in Hořava-Lifshitz theory

- PhysicsPhysical Review D
- 2018

We analyze the electromagnetic-gravity interaction in a pure Hořava-Lifshitz framework. To do so we formulate the Hořava-Lifshitz gravity in $4+1$ dimensions and perform a Kaluza-Klein reduction to…

### M ay 2 02 1 Gravitational waves in the anisotropic Hořava-Lifshitz theory

- Physics
- 2021

We show that in the anisotropic Hořava-Lifshitz gravity there is a well-defined wave zone where the physical degrees of freedom propagate according to a non-relativistic linear evolution equation of…

### Gravitational waves in Hořava-Lifshitz anisotropic gravity

- PhysicsPhysical Review D
- 2021

We show that in the anisotropic Hořava-Lifshitz gravity there is a well-defined wave zone where the physical degrees of freedom propagate according to a non-relativistic linear evolution equation of…

### Tests of standard cosmology in Hořava gravity, Bayesian evidence for a closed universe, and the Hubble tension

- Materials ScienceThe European Physical Journal C
- 2022

We consider some background tests of standard cosmology in the context of Hořava gravity with different scaling dimensions for space and time, which has been proposed as a renormalizable,…

### The Hamiltonian dynamics of Hořava gravity

- PhysicsThe European Physical Journal C
- 2020

We consider the Hamiltonian formulation of Hořava gravity in arbitrary dimensions, which has been proposed as a renormalizable gravity model for quantum gravity without the ghost problem. We study…

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