Separating expansion and collapse in general fluid models with heat flux

Autor(es)

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]

Afiliação do(s) autor(es)

^[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

• Tipo de documento: Artigo Científico
• Fonte: Physical Review D; v. 88, n. 2 JUL 29 2013.
• Citações Web of Science: 16

Resumo

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)

• Processo FAPESP: 11/24089-5 - Astropartículas: cosmologia e formação de estruturas galácticas e aglomerados
• Beneficiário: Elcio Abdalla
• Modalidade de apoio: Auxílio à Pesquisa - Pesquisador Visitante - Internacional
• Processo FAPESP: 11/11365-4 - Teorias cosmológicas de matéria e energia escuras
• Beneficiário: Michele Fontanini
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado
• Processo FAPESP: 10/08267-8 - Termodinâmica e modelos de teoria de campos em matéria e energia escuras
• Beneficiário: Daniel Carrasco Guariento
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado