Abstract The Laser Interferometer Space Antenna (LISA) has the potential to reveal wonders
about the fundamental theory of nature at play in the extreme gravity regime, where the …

The understanding of stellar structure represents the crossroads of our theories of the
nuclear force and the gravitational interaction under the most extreme conditions observably …

The dawn of the twenty-first century came with very positive prospects for gravity, cosmology,
and astrophysics. Technological progress made it possible for cosmology to enter to its …

We study the cosmological propagation of gravitational waves (GWs) beyond general
relativity (GR) across homogeneous and isotropic backgrounds. We consider scenarios in …

The violations of parity and Lorentz symmetries in gravity can change the propagating
properties of gravitational waves (GWs) in the cosmological background, which can arise …

Gravitational waves emitted by distorted black holes, such as those arising from the
coalescence of binary black holes, or a falling compact star into a supermassive black hole …

The examination of parity symmetry in gravitational interactions has drawn increasing
attention. Although Einstein's General Relativity is parity-conserved, numerous theories of …

Lorentz symmetry is a fundamental property of Einstein's theory of general relativity that one
may wish to test with gravitational wave observations. Einstein-æther theory is a model that …

In nonminimally coupled theories where a scalar field ϕ is coupled to the Ricci scalar,
neutron stars (NSs) can have scalar charges through an interaction with matter mediated by …

Gravitational-wave (GW) memory effects produce permanent shifts in the GW strain and its
time integrals after the passage of a burst of GWs. Their presence is closely tied to the …