arXiv subjects

H. P. de Oliveira

Publications and source records attributed to H. P. de Oliveira.

56 records · Page 4Linked to original sources

arXiv1994

Dynamics of Massive Shells Ejected in a Supernova Explosion

An expanding shell is accelerated outward by radiation from the remnant star and slowed by ram pressure and accretion as it plows into the interstellar medium. We set up the general relativistic equations of motion for such a shell. In the non-relativistic limit, the reduce to the standard Ostriker-Gunn equations. Furthermore, it is shown that the motion equation can be integrated in general, reducing in this way the study of the dynamics of a shell to a set of four coupled first order differential equations, solvable up to quadrature

astro-ph↗

arXiv1993

Dynamics and Collision of Massive Shells in Curved Backgrounds

We analyse the dynamics of the collision of two spherical massive shells in a generally spherically symmetric background, obtaining an expression from the conservation law that imposes a constraint between the different parameters involved. We study the light-like limit and make some comparisons of the predictions of our master equation with the results obtained in the case of collision of light-like shells, like the short life of white holes or the mass inflation phenomena. We present some particular cases of the constraint equation.

gr-qc↗