317 citations · 479 across the 15 of their papers we have counts for
9 papers · 1 filter
Neutron Stars in Causal Scalar-Tensor Theories
Mark P. Hertzberg, Oleksandr S. Stashko
We study static, spherically symmetric neutron stars in a class of scalar-tensor theories with non-canonical kinetic terms (K-essence) obeying all causality and hyperbolicity condi…
Spherically symmetric configurations in the quadratic gravity
V. I. Zhdanov, O. S. Stashko, Yu. V. Shtanov
We study spherically symmetric configurations of the quadratic gravity in the Einstein frame. In case of a purely gravitational system, we have determined the global qualita…
Quasi-normal modes of naked singularities in presence of non-linear scalar fields
O. S. Stashko, O. V. Savchuk, V. I. Zhdanov
We study linear perturbations against static spherically symmetric background configurations of General Relativity with a real scalar field (SF), which is minimally coupled with gr…
Circular orbits of test particles interacting with massless linear scalar field of the naked singularity
O. S. Stashko, V. I. Zhdanov
We study effects of the particles coupling with scalar field (SF) on the distribution of stable circular orbits (SCO) around the naked singularity described by the well-known Fishe…
New Horizons for Fundamental Physics with LISA
K. G. Arun, Enis Belgacem, Robert Benkel +138
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 gravitatio…
Singularities in static spherically symmetric configurations of General Relativity with strongly nonlinear scalar fields
O. S. Stashko, V. I. Zhdanov
There are a number of publications on relativistic objects dealing either with black holes or naked singularities in the center. Here we show that there exist static spherically sy…