In this paper, we present an overview of recent developments in the numerical solution of
Horndeski gravity theories, which are the class of all scalar–tensor theories of gravity that …

The merger remnant of a binary neutron star coalescence is initially strongly differentially
rotating. Some properties of these remnants can be accurately modeled through building …

Gravitational waves in the postmerger phase of binary neutron star mergers may become
detectable with planned upgrades of existing gravitational-wave detectors or with more …

Many classes of extended scalar-tensor theories predict that dynamical instabilities can take
place at high energies, leading to the formation of scalarized neutron stars. Depending on …

The investigation of the phase state of dense matter is hindered by complications of first-
principle nonperturbative quantum chromodynamics. By performing the first consistent …

We analyze numerically the dynamical transition to spontaneous scalarization in neutron
stars in the framework of a scalar-tensor theory of gravity where the scalar field is free but …

Dark matter, an important portion of compact objects, can influence different phenomena in
neutron stars. The spontaneous scalarization in the scalar-tensor gravity has been proposed …

We consider neutron star configurations in the scalar-tensor theory of gravity with the
coupling between the kinetic term of a scalar field and the Einstein tensor (such the model is …

Beyond black holes and neutron stars, new hypothetical compact objects have been
proposed as potential astrophysical entities. In general, their properties have not yet been …

In the first part of this thesis, we investigate some tidal phenomena in the pre-merger stage
of coalescing binaries with at least one neutron star (NS) involved. In particular, during the …