Perturbations of black holes, initially considered in the context of possible observations of
astrophysical effects, have been studied for the past 10 years in string theory, brane-world …

As gravitational waves are now being nearly routinely measured with interferometers, the
question of using them to probe new physics becomes increasingly legitimate. In this article …

By studying perturbations about the vacuum, we show that Hořava gravity suffers from two
different strong coupling problems, extending all the way into the deep infra-red. The first of …

There has been a significant surge of interest in Hořava's model for 3+ 1 dimensional
quantum gravity, this model being based on anisotropic scaling at az= 3 Lifshitz point …

In this paper, under the illumination of thin disk accretion, we have employed the ray-tracing
method to carefully investigate shadows and rings of the Kehagias-Sfetsos (KS) black hole …

In the nonrelativistic theory of gravitation recently proposed by Hořava, the Hamiltonian
constraint is not a local equation satisfied at each spatial point but an equation integrated …

We study scalar, electromagnetic, and gravitational test fields in the Hayward, Bardeen, and
Ayón-Beato-García regular black hole spacetimes and demonstrate that the test fields are …

Recently Hořava proposed a renormalizable gravity theory in four dimensions which
reduces to Einstein gravity with a non-vanishing cosmological constant in IR but with …

We formulate Hořava–Lifshitz cosmology with an additional scalar field that leads to an
effective dark energy sector. We find that, due to the inherited features from the gravitational …

We investigate the scalar and tensor perturbations in Hořava gravity, with and without
detailed balance, around a flat background. Once both types of perturbations are taken into …