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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Separating expansion and collapse in general fluid models with heat flux

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Author(s):
Le Delliou, Morgan [1, 2] ; Mimoso, Jose P. [2, 3] ; Mena, Filipe C. [4, 5] ; Fontanini, Michele [1] ; Guariento, Daniel C. [1] ; Abdalla, Elcio [1]
Total Authors: 6
Affiliation:
[1] Univ Sao Paulo, Inst Fis, Dept Fis Matemat, BR-05314970 Sao Paulo - Brazil
[2] Univ Lisbon, Fac Ciencias, Ctr Astron & Astrofis, P-1769016 Lisbon - Portugal
[3] Univ Lisbon, Fac Ciencias, Dept Fis, P-1769016 Lisbon - Portugal
[4] Univ Minho, Ctr Matemat, P-4710057 Braga - Portugal
[5] Univ Estado Rio de Janeiro, Inst Fis, Dept Fis Teor, BR-20550900 Rio De Janeiro - Brazil
Total Affiliations: 5
Document type: Journal article
Source: Physical Review D; v. 88, n. 2 JUL 29 2013.
Web of Science Citations: 16
Abstract

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 gauge-invariant 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. (AU)

FAPESP's process: 11/24089-5 - Astroparticles: cosmology and structures formation - galaxies - clusters
Grantee:Elcio Abdalla
Support Opportunities: Research Grants - Visiting Researcher Grant - International
FAPESP's process: 11/11365-4 - Cosmological theories of matter and dark energy
Grantee:Michele Fontanini
Support Opportunities: Scholarships in Brazil - Post-Doctoral
FAPESP's process: 10/08267-8 - Thermodynamics and field theory models for dark matter and dark energy
Grantee:Daniel Carrasco Guariento
Support Opportunities: Scholarships in Brazil - Post-Doctoral