• Publications
  • Influence
Local anisotropy in self-gravitating systems
Abstract We review and discuss possible causes for the appearance of local anisotropy (principal stresses unequal) in self-gravitating systems and present its main consequences. We consider bothExpand
  • 514
  • 5
Dynamical instability for radiating anisotropic collapse
We study the role played by local anisotropy and radiation (in the free-streaming regime) in the onset of dynamical instabilities. In the case of anisotropy we find that, for Newtonian andExpand
  • 229
  • 5
Dynamical instability for non-adiabatic spherical collapse
Etude de l'instabilite dynamique d'une distribution de fluide a symetrie spherique lors de l'effondrement non adiabatique et subissant une dissipation sous la forme d'un ecoulement radial de chaleur.Expand
  • 110
  • 5
Dynamics of dissipative gravitational collapse
The Misner and Sharp approach to the study of gravitational collapse is extended to the dissipative case in, both, the streaming out and the diffusion approximations. The role of different terms inExpand
  • 118
  • 3
  • PDF
Shear-free radiating collapse and conformal flatness
Here we study some general properties of spherical shear-free collapse. Its general solution when imposing conformal atness is re-obtained (Refs. 1 and 2) and matched to the outgoing VaidyaExpand
  • 67
  • 3
  • PDF
Dynamical instability for shearing viscous collapse
We study the role played by the shear and the shearing viscosity in the onset of dynamical instabilities. For both the Newtonian and the relativistic regimes, the shearing viscosity decreases theExpand
  • 99
  • 2
Shearing expansion-free spherical anisotropic fluid evolution
Spherically symmetric expansion-free distributions are systematically studied. The entire set of field equations and junction conditions are presented for a general distribution of dissipativeExpand
  • 105
  • 2
  • PDF
EXPANSION-FREE EVOLVING SPHERES M UST HAVE INHOM OGENEOUS ENERGY DENSITY DISTRIBUTIONS
In a recent paper a systematic study on shearing expansion-free spherically symmetric distributions was presented. As a particular case of such systems, the Skripkin model was mentioned, whichExpand
  • 52
  • 2
  • PDF
Spatially homogeneous cosmological models
We study nonviscous and viscous fluids in Bianchi types II, VIII, and IX space-times under the restriction that the ratio of shear to expansion be constant.
  • 40
  • 2
The parameters of the Lewis metric for the Weyl class
We provide physical interpretation for the four parameters of the stationary Lewis metric restricted to the Weyl class. Matching this spacetime to a completely anisotropic, rigidly rotating, fluidExpand
  • 26
  • 2
  • PDF
...
1
2
3
4
5
...