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TitleSeparating expansion and collapse in general fluid models with heat flux
Author(s)Mena, Filipe C.
Delliou, Morgan Le
Mimoso, José P.
Fontani, Michele
Guariento, Daniel
Abdalla, Elcio
Issue date1-Jul-2013
PublisherAIP Publishing
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Abstract(s)In this paper we consider spherically symmetric general fluids with heat flux, motivated by causal thermodynamics, and give the appropriate set of conditions that define separating shells defining the divide between expansion and collapse. To do so we add the new requirement that heat flux and its evolution vanish at the separating surface. We extend previous works with a fully nonlinear analysis in the 1+3 splitting, and present gaugeinvariant results. The definition of the separating surface is inspired by the conservation of the Misner-Sharp mass, and is obtained by generalizing the Tolman-Oppenheimer-Volkoff equilibrium and turnaround conditions. We emphasize the nonlocal character of these conditions as found in previous works and discuss connections to the phenomena of spacetime cracking and thermal peeling.
AccessRestricted access (UMinho)
Appears in Collections:CMAT - Artigos em revistas com arbitragem / Papers in peer review journals

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