1.4k citations
- The University of MelbourneAU4 papers
- Universidad de ValladolidES4 papers
- University of the AndesVE4 papers
- Central University of VenezuelaVE2 papers
- Centre National de la Recherche ScientifiqueFR2 papers
- Health Research Institute of the Balearic IslandsES2 papers
- Simón Bolívar UniversityVE2 papers
- Universidad de ZaragozaES2 papers
- Universidad Nacional Experimental Politécnica "Antonio José de Sucre"VE2 papers
- Universidad San JorgeES2 papers
- Universitat de les Illes BalearsES2 papers
- Boston UniversityUS1 paper
8 papers · 1 filter
Bondian frames to couple matter with radiation
W. Barreto, L. Castillo, E. Barrios
A study is presented for the non linear evolution of a self gravitating distribution of matter coupled to a massless scalar field. The characteristic formulation for numerical rela…
Central equation of state in spherical characteristic evolutions
W. Barreto, L. Castillo, E. Barrios
We study the evolution of a perfect--fluid sphere coupled to a scalar radiation field. By ensuring a Ricci invariant regularity as a conformally flat spacetime at the central world…
Gravitational radiation from nonaxisymmetric spherical Couette flow in a neutron star
C. Peralta, A. Melatos, M. Giacobello +1
The gravitational wave signal generated by global, nonaxisymmetric shear flows in a neutron star is calculated numerically by integrating the incompressible Navier--Stokes equation…
A self-similar dynamics in viscous spheres
W. Barreto, J. Ovalle, B. Rodriguez
We study the evolution of radiating and viscous fluid spheres assuming an additional homothetic symmetry on the spherically simmetric space--time. We match a very simple solution t…
Equation of state and transport processes in self--similar spheres
W. Barreto, C. Peralta, L. Rosales
We study the effect of transport processes (diffusion and free--streaming) on a collapsing spherically symmetric distribution of matter in a self--similar space--time. A very simpl…
Gravitational Instability of a Kink
W. Barreto, R. Gomez, L. Lehner +1
We study the equilibria of a self-gravitating scalar field in the region outside a reflecting barrier. By introducing a potential difference between the barrier and infinity, we cr…