54 citations · 467 across the 45 of their papers we have counts for
3 papers · 2 filters
Casimir energy in finite expanding universes: a prelude
Sandro Silva e Costa, Reuven Opher
We present the Green's functions that are the solutions of the massive Klein-Gordon equation for a scalar field with non-minimal coupling to gravitation for several static and expa…
Global Alfven Wave Heating of the Magnetosphere of Young Stars
A. G. Elfimov, R. M. O. Galvao, V. Jatenco-Pereira +1
Excitation of a Global Alfven wave (GAW) is proposed as a viable mechanism to explain plasma heating in the magnetosphere of young stars. The wave and basic plasma parameters are c…
On the thickness of a mildly relativistic collisional shock wave
Jose A. S. Lima, Alejandra Kandus, Reuven Opher
We consider an imperfect relativistic fluid which develops a shock wave and discuss its structure and thickness, taking into account the effects of viscosity and heat conduction in…