43 citations · 103 across the 9 of their papers we have counts for
10 papers
Tachyon cosmology, supernovae data and the Big Brake singularity
Z. Keresztes, L. Á. Gergely, V. Gorini +2
We compare the existing observational data on type Ia Supernovae with the evolutions of the universe predicted by a one-parameter family of tachyon models which we have introduced…
On the validity of the 5-dimensional Birkhoff theorem: The tale of an exceptional case
Zoltán Keresztes, László Á. Gergely
The 5-dimensional (5d) Birkhoff theorem gives the class of 5d vacuum space-times containing spatial hypersurfaces with cosmological symmetries. This theorem is violated by the 5d v…
Cosmological tests of generalized RS brane-worlds with Weyl fluid
László Á. Gergely, Zoltán Keresztes, Gyula M. Szabó
A class of generalized Randall-Sundrum type II (RS) brane-world models with Weyl fluid are confronted with the Gold supernovae data set and BBN constraints. We consider three model…
The luminosity-redshift relation in brane-worlds: II. Confrontation with experimental data
Gyula M. Szabó, László Á. Gergely, Zoltán Keresztes
The luminosity distance - redshift relation for a wide class of generalized Randall-Sundrum type II brane-world models with Weyl fluid is compared to the presently available supern…
The second post-Newtonian order generalized Kepler equation
László Á. Gergely, Zoltán Keresztes, Balázs Mikóczi
The radial component of the motion of compact binary systems composed of neutron stars and/or black holes on eccentric orbit is integrated. We consider all type of perturbations th…
Kepler Equation for the Compact Binaries under the Spin-spin Interaction
Zoltán Keresztes, Balázs Mikóczi
In this work we consider compact binaries on eccentric orbit under the spin-spin interaction. Using the post-Newtonian formalism, the binaries undergo a perturbed Keplerian motion.…