2 papers
gr-qc2010
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…
gr-qc2009
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…