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gr-qc2017
Gravitational waves in a flat radiation-matter universe including anisotropic stress
Andrew J. Wren, Jorge L. Fuentes, Karim A. Malik
We present novel analytical solutions for linear-order gravitational waves or tensor perturbations in a flat Friedmann-Robertson-Walker universe containing two perfect fluids, radi…
astro-ph.CO2017★ 1 cited
A core-halo pattern of entropy creation in gravitational collapse
Andrew J. Wren
This paper presents a kinetic theory model of gravitational collapse due to a small perturbation. Solving the relevant equations yields a pattern of entropy destruction in a spheri…