ListarArticulos, Pre-prints (Facultad de Ciencias) por tema "Laboratorio de Física Teórica"
Mostrando ítems 1-18 de 18
-
Comment on Ricci Collineations of static spherically symmetric spacetimes
(SABER ULA, 2006-01-26)Comment on Ricci Collineations of static spherically symmetric spacetimes (Núñez, Luis; Contreras, Gerardo; Percoco, Umberto; Bertolotti, Ricardo; Carot, J.) Abstract We present a counter example to a theorem given ... -
Cracking of self-gravitating compact objects with local and non local equations of state.
(SABER ULA, 2006-12-28)Cracking of self-gravitating compact objects with local and non local equations of state. (Abreu, Henso; Hernández, Hector y Núñez, Luis) Abstract We discuss the effect that small fluctuations of density and local ... -
Curvature singularity of the distributional BTZ black hole geometry
(SABER ULA, 2005-05-25)Curvature singularity of the distributional BTZ black hole geometry Pantoja, Nelson; Rago, Héctor; Rodríguez, R.O. Abstract For the non-rotating BTZ black hole, the distributional curvature ... -
Distributional sources in general relativity:
(SABER ULA, 2003-07-04)Distributional sources in general relativity: Two point-like examples revisited (Pantoja, Nelson; Rago, Hector) Abstract A regularization procedure, that allows one to relate singularities of curvature to those ... -
Energy-momentum tensor valued distributions for the Schwarzschild and Reissner-Nordstrom geometries
(SABER ULA, 2003-07-04)Energy-momentum tensor valued distributions for the Schwarzschild and Reissner-Nordstrom geometries (Pantoja, Nelson; Rago, Hector) Abstract An approach to computing, withing the framework of distribution theory, ... -
Luminosity profiles and the evolution of shock waves in general-relativistic radiating spheres
(SABER ULA, 2005-12-08)Luminosity profiles and the evolution of shock waves in general-relativistic radiating spheres (Herrera, L.; Núñez, Luis) Abstract A method recently proposed by the authors to study the evolution of discontinuities ... -
Modeling "hydrodynamic phase transitions" in a radiating spherically symmetric distribution of matter
(SABER ULA, 2005-12-08)Modeling "hydrodynamic phase transitions" in a radiating spherically symmetric distribution of matter (Herrera, L.; Núñez, Luis) Abstract A method recently proposed by the authors to study the evolution of discontinuities ... -
Nonlocal equation of state in general relativistic radiating spheres
(SABER ULA, 2006-01-26)Nonlocal equation of state in general relativistic radiating spheres (Núñez, Luis; Hernández, Hector; Percoco, Umberto) Abstract We show that under particular circumstances a general relativistic spherically symmetric ... -
On the eccentricity behaviour of radiating slowly rotating bodies in general relativity
(SABER ULA, 2006-01-26)On the eccentricity behaviour of radiating slowly rotating bodies (Núñez, Luis; Hernández, Hector; Herrera, Luis; Percoco, Umberto) Abstract We study different models of radiating slowly rotating bodies up to the ... -
On the general structure of Ricci collineations for type B warped spacetimes.
(SABER ULA, 2005-08-18)On the general structure of Ricci collineations for type B warped spacetimes (Flores, J. L.; Parra, Yoan; Percoco, Umberto.) Abstract A complete study of the structure of Ricci collineations for type B warped spacetimes ... -
Propagation of a shock wave in a radiating spherically symmetric distribution of matter
(SABER ULA, 2005-12-08)Propagation of a shock wave in a radiating spherically symmetric distribution of matter (Herrera, L.; Núñez, Luis) Abstract A method used to study the evolution of radiating spheres reported by L. Herrera, J. Jimenez, ... -
Radiating spheres in general relativity with a mixed transport energy flow
(SABER ULA, 2006-01-26)Radiating spheres in general relativity with a mixed transport energy flow (Barreto Acevedo, Willians; Núñez, Luis) Abstract A semi-numerical method by Herrera et al. (1980) is extended to handle the evolution of ... -
Radiation flow and viscous stresses in anisotropic gravitational collapse
(SABER ULA, 2006-01-26)Radiation flow and viscous stresses in anisotropic gravitational collapse (Martínez, Justino; Pavón, Diego; Núñez, Luis) Abstract The Herrera-Jimenez-Ruggeri method is employed to analyse the evolution of anisotropic ... -
Ricci collineations for non-degenerate, diagonal and spherically symmetric ricci tensors
(SABER ULA, 2006-01-26)Ricci collineations for non-degenerate, diagonal and spherically symmetric ricci tensors (Núñez, Luis; Percoco, Umberto; Contreras, Gerardo) Abstract The expression of the vector field generator of a Ricci Collineation ... -
Sound speeds, cracking and stability of self-gravitating anisotropic compact objects.
(SABER ULA, 2007-06-25)Sound speeds, cracking and stability of self-gravitating anisotropic compact objects. Abstract Using the the concept of cracking we explore the influence of density fluctuations and local anisotropy have on the stability ... -
Supernovae: Where and why do they break off?
(SABER ULA, 2005-12-08)Supernovae: Where and why do they break off? (Herrera, L.; Núñez, Luis) Abstract The precise mechanism whereby gravitational collapse leads to a type II supernova event is one of the most controversial points in the ... -
The evolution of discontinuities in radiating spheres in the diffusion approximation
(SABER ULA, 2005-12-08)The evolution of discontinuities in radiating spheres in the diffusion approximation (Barreto Acevedo, Willians; Herrera, L.; Núñez, Luis) Abstract The evolution of discontinuities in a general relativistic sphere ... -
The gravitational and electrostatic fields far from an isolated Einstein-maxwell source.
(SABER ULA, 2006-08-03)