42 citations · 116 across the 12 of their papers we have counts for
6 papers · 1 filter
On the invariant symmetries of the -metrics
Joan Josep Ferrando, Juan Antonio Sáez
We analyze the symmetries and other invariant qualities of the -metrics (type D aligned Einstein Maxwell solutions with cosmological constant whose Debever null princi…
Creatable Universes
Joan Josep Ferrando, Ramon Lapiedra, Juan Antonio Morales
We consider the question of properly defining energy and momenta for non asymptotic Minkowskian spaces in general relativity. Only spaces of this type, whose energy, linear 3-momen…
Rainich theory for type D aligned Einstein-Maxwell solutions
Joan Josep Ferrando, Juan Antonio Sáez
The original Rainich theory for the non-null Einstein-Maxwell solutions consists of a set of algebraic conditions and the Rainich (differential) equation. We show here that the sub…
Physics of Relativistic Perfect Fluids
Bartolomé Coll, Joan Josep Ferrando
A criterion is presented and discussed to detect when a divergence-free perfect fluid energy tensor in the space-time describes an evolution in local thermal equilibrium. This crit…
On the thermodynamics of inhomogeneous perfect fluid mixtures
Bartolomé Coll, Joan Josep Ferrando
It is shown that inhomogeneous Szekeres and Stephani universes exist corresponding to non-dissipative binary mixtures of perfect fluids in local thermal equilibrium. This result co…
Ideal Gas Stephani Universes
Bartolomé Coll, Joan Josep Ferrando
The Stephani Universes that can be interpreted as an ideal gas evolving in local thermal equilibrium are determined, and the method to obtain the associated thermodynamic schemes i…