168 citations
- University of SzegedHU8 papers
- Bucharest University of Economic StudiesRO5 papers
- Sapienza University of RomeIT4 papers
- University of LeicesterGB4 papers
- Max Planck Institute for Radio AstronomyDE3 papers
- University College LondonGB3 papers
- University of MacerataIT3 papers
- Heriot-Watt UniversityGB2 papers
- Karlsruhe Institute of TechnologyDE2 papers
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5 papers · 1 filter
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…
Renormalized 2PN spin contributions to the accumulated orbital phase for LISA sources
László Á. Gergely, Balázs Mikóczi
We give here a new third post-Newtonisn (3PN) spin-spin contribution (in the PN parameter ) to the accumulated orbital phase of a compact binary, arising from the spin-orbit pre…
Friedmann branes with variable tension
László Á. Gergely
We introduce brane-worlds with non-constant tension, strenghtening the analogy with fluid membranes, which exhibit a temperature-dependence according to the empirical law establish…
Viscous dissipative Chaplygin gas dominated homogenous and isotropic cosmological models
C. S. J. Pun, L. Á. Gergely, M. K. Mak +3
The generalized Chaplygin gas, which interpolates between a high density relativistic era and a non-relativistic matter phase, is a popular dark energy candidate. We consider a gen…
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…