Cosmological black holes from self-gravitating fields

Autor(es)

Abdalla, Elcio ^[1] ; Afshordi, Niayesh ^{[2, 3]} ; Fontanini, Michele ^[1] ; Guariento, Daniel C. ^{[1, 2]} ; Papantonopoulos, Eleftherios ^[4]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Inst Fis, BR-05315970 Sao Paulo - Brazil

^[2] Perimeter Inst Theoret Phys, Waterloo, ON N2L 2Y5 - Canada

^[3] Univ Waterloo, Dept Phys & Astron, Waterloo, ON N2L 3G1 - Canada

^[4] Natl Tech Univ Athens, Dept Phys, GR-15773 Athens - Greece

• Tipo de documento: Artigo Científico
• Fonte: Physical Review D; v. 89, n. 10 MAY 12 2014.
• Citações Web of Science: 16

Resumo

Both cosmological expansion and black holes are ubiquitous features of our observable Universe, yet exact solutions connecting the two have remained elusive. To this end, we study self-gravitating classical fields within dynamical spherically symmetric solutions that can describe black holes in an expanding universe. After attempting a perturbative approach of a known black-hole solution with scalar hair, we show by exact methods that the unique scalar field action with first-order derivatives that can source shear-free expansion around a black hole requires noncanonical kinetic terms. The resulting action is an incompressible limit of k-essence, otherwise known as the cuscuton theory, and the spacetime it describes is the McVittie metric. We further show that this solution is an exact solution to the vacuum Horava-Lifshitz gravity with anisotropic Weyl symmetry. (AU)

• Processo FAPESP: 13/01854-3 - Buracos negros no universo em expansão e a interação entre matéria e energia escuras
• Beneficiário: Daniel Carrasco Guariento
• Modalidade de apoio: Bolsas no Exterior - Estágio de Pesquisa - Pós-Doutorado
• 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