5 papers
On non-singular inhomogeneous cosmological models
L. Fernández-Jambrina, L. M. González-Romero
In this talk we would like to review recent results on non-singular cosmological models. It has been recently shown that among stiff perfect fluid inhomogeneous spacetimes the abse…
Towards an open set of regular cosmological models
L. Fernández-Jambrina, L. M. González-Romero
The possibility of obtaining an open set of regular cosmological models is discussed. Cylindrical stiff perfect fluid cosmologies are studied in detail. The condition for geodesic…
New families of singularity-free cosmological models
L. Fernández-Jambrina, L. M. González-Romero
In this talk we extend a family of geodesically complete stiff fluid cosmological models to the case in which the velocity of the fluid is not orthogonal to the gradient of…
Non-singular Stiff Fluids
L. Fernández-Jambrina, L. M. González-Romero
In this talk the possibility of constructing geodesically complete inhomogeneous stiff fluid cosmologies is discussed. A family with infinite parameters is derived. A wide and easy…
Neutron Stars Properties and Crust Movements in Post-glitch Epoch
L. M. González-Romero, F. Navarro-Lérida
Using a new numerical code with non-uniform adapted mesh, we study the changes produced in the global properties of neutron stars by the motion of matter in crust region during pos…