182 citations · 581 across the 18 of their papers we have counts for
19 papers
Quasi--hyperbolically symmetric -metric
L. Herrera, A. Di Prisco, J. Ospino +1
We carry out a systematic study on the motion of test particles in the region inner to the naked singularity of a quasi--hyperbolically symmetric -metric. The geodesic equations…
Geodesics of the hyperbolically symmetric black hole
L. Herrera, A. Di Prisco, J. Ospino +1
We carry out a systematic study on the motion of test particles in the region inner to the horizon of a hyperbolically symmetric black hole. The geodesic equations are written and…
Self-similarity in static axially symmetric relativistic fluids
L. Herrera, A. Di Prisco
We carry on a general study on axially symmetric, static fluids admitting a conformal Killing vector (CKV). The physical relevance of this kind of symmetry is emphasized. Next, we…
Shearing and geodesic axially symmetric perfect fluids that do not produce gravitational radiation
L. Herrera, A. Di Prisco, J. Ospino +1
Using a framework based on the 1+3 formalism we carry out a study on axially and reflection symmetric perfect and geodesic fluids, looking for possible models of sources radiating…
Radiation and vorticity: The missing link
L. Herrera
In the context of General Relativity, radiation, either gravitational or electromagnetic, is closely associated to vorticity of observers world lines. We stress in this letter that…
Vorticity and entropy production in tilted Szekeres spacetimes
L. Herrera, A. Di Prisco, J. Ibañez +1
We analyze the properties of the tilted Szekeres spacetime, i.e. the version of such spacetime as seen by a congruence of observers with respect to which the fluid is moving. The i…
Reversible Dissipative Processes, Conformal Motions and Landau Damping
L. Herrera, A. Di Prisco, J. Ibañez
The existence of a dissipative flux vector is known to be compatible with reversible processes, provided a timelike conformal Killing vector (CKV) (where …
On the Meaning of General Covariance and the Relevance of Observers in General Relativity
L. Herrera
Since the appearance of General Relativity, its intrinsec general covariance has been very often misinterpreted as implying that physically meaningful quantitities (and conclusions…
Event Horizon of the Monopole-Quadrupole solution: geometric and thermodynamic properties
J. L. Hernandez-Pastora, L. Herrera
We investigate the general geometric properties of the surface of infinite red-shift corresponding to the event horizon of the static and axisymmetric solution of the Einstein vacu…
Tilted Lemaitre-Tolman-Bondi Spacetimes: Hydrodynamic and Thermodynamic Properties
L. Herrera, A. Di Prisco, J. Ibañez
We consider Lemaitre-Tolman-Bondi spacetimes from the point of view of a tilted observer, i.e. one with respect to which the fluid is radially moving. The imperfect fluid and the c…
On the dual interpretation of zero-curvature Friedmann-Robertson-Walker models
L. Herrera, A. Di Prisco, J. Ibanez
Two possible interpretations of FRW cosmologies (perfect fluid or dissipative fluid)are considered as consecutive phases of the system. Necessary conditions are found, for the tran…
Measuring multipole moments of Weyl metrics by means of gyroscopes
L. Herrera, J. L. Hernandez Pastora
Using the technique of Rindler and Perlick we calculate the total precession per revolution of a gyroscope circumventing the source of Weyl metrics. We establish thereby a link bet…
The Relativistic Transformation to Rotating Frames
L. Herrera
We present a critical review of the relativistic rotation transformation of Trocheris and Takeno. A new transformation is proposed which is free from the drawbacks of the former. S…
Dissipative Collapse Through the Critical Point
L. Herrera, J. Martinez
A relativistic model of a heat conducting collapsing star, which includes thermal pre-relaxation processes, is presented. Particular attention is paid to the influence of a given p…
Breakdown of the linear approximation in the perturbative analysis of heat conduction in relativistic systems
L. Herrera, A. Di Prisco, J. Martinez
We analyze the effects of thermal conduction in a relativistic fluid just after its departure from spherical symmetry, on a time scale of the order of relaxation time. Using first…
On the role of density inhomogeneity and local anisotropy in the fate of spherical collapse
L. Herrera, A. Di Prisco, J. L. Hernandez-Pastora +1
We obtain an expression for the active gravitational mass of a collapsing fluid distribution, which brings out the role of density inhomogeneity and local anisotropy in the fate of…
Dissipative fluids out of hydrostatic equilibrium
L. Herrera, J. Martinez
In the context of the Müller-Israel-Stewart second order phenomenological theory for dissipative fluids, we analyze the effects of thermal conduction and viscosity in a relativisti…
On the Critical Behaviour of Heat Conducting Sphere out of Hydrostatic Equilibrium
L. Herrera, J. Martinez
We comment further on the behaviour of a heat conducting fluid when a characteristic parameter of the system approaches a critical value.
Thermal Conduction in Systems out of Hydrostatic Equilibrium
L. Herrera, A. Di Prisco, J. L. Hernandez-Pastora +2
We analyse the effects of thermal conduction in a relativistic fluid, just after its departure from hydrostatic equilibrium, on a time scale of the order of thermal relaxation time…