404 citations · 3k across the 30 of their papers we have counts for
29 papers
Complexity factors for axially symmetric static sources
L. Herrera, A. Di Prisco, J. Ospino
A previously found definition of complexity for spherically symmetric fluid distributions [1], is extended to axially symmetric static sources. In this case there are three differe…
Expansion-Free Cavity Evolution: Some exact Analytical Models
A. Di Prisco, L. Herrera, J. Ospino +2
We consider spherically symmetric distributions of anisotropic fluids with a central vacuum cavity, evolving under the condition of vanishing expansion scalar. Some analytical solu…
Relativistic gravitational collapse in comoving coordinates: The post-quasistatic approximation
L. Herrera, W. Barreto
A general iterative method proposed some years ago for the description of relativistic collapse, is presented here in comoving coordinates. For doing that we redefine the basic con…
Dynamical instability and the expansion-free condition
L. Herrera, G. Le Denmat, N. O. Santos
We study the dynamical instability of a spherically symmetric anisotropic fluid which collapses adiabatically under the condition of vanishing expansion scalar. The Newtonian and p…
Cavity evolution in relativistic self-gravitating fluids
L. Herrera, G. Le Denmat, N. O. Santos
We consider the evolution of cavities within spherically symmetric relativistic fluids, under the assumption that proper radial distance between neighboring fluid elements remains…
Expansion-Free Evolving Spheres Must Have Inhomogeneous Energy Density Distributions
L. Herrera, G. Le Denmat, N. O. Santos
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 ment…