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gr-qc1998
Exact solutions of Einstein's equations with ideal gas sources
Roberto A. Sussman, Josep Triginer
We derive a new class of exact solutions characterized by the Szekeres-Szafron metrics (of class I), admitting in general no isometries. The source is a fluid with viscosity but ze…
astro-ph1998
Acoustic oscillations and viscosity
Roy Maartens, Josep Triginer
Using a simple thermo-hydrodynamic model that respects relativistic causality, we revisit the analysis of qualitative features of acoustic oscillations in the photon-baryon fluid.…