Accretion of perfect fluids onto a class of regular black holes

Autor(es)

Neves, Juliano C. S. ^[1] ; Saa, Alberto ^[2]

Afiliação do(s) autor(es)

^[1] Univ Fed ABC, Ctr Ciencias Nat & Humanas, Ave Estados 5001, BR-09210580 Santo Andre, SP - Brazil

^[2] Univ Estadual Campinas, Dept Matemat Aplicada, BR-13083859 Campinas, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: ANNALS OF PHYSICS; v. 420, SEP 2020.
• Citações Web of Science: 0

Resumo

We consider the stationary spherical accretion process of perfect fluids onto a class of spherically symmetric regular black holes corresponding to quantum-corrected Schwarzschild space times. We show that the accretion rates can differ from the Schwarzschild case, suggesting that the de Sitter core inside these regular black holes, which indeed precludes the central singularity, can act for some cases as a sort of antigravitational source, decreasing the fluid's radial infall velocity in the accretion process, and for others as a gravitational enhancer, increasing the fluid flow into the black hole horizon. Our analysis and results can be extended and also applied to the problem of black hole evaporation in cosmological scenarios with phantom fluids. In particular, we show that the mass of typical regular black holes can be used in order to constrain turnaround events in cyclic cosmologies. (c) 2020 Elsevier Inc. All rights reserved. (AU)

• Processo FAPESP: 13/09357-9 - Física e geometria do espaço-tempo
• Beneficiário: Alberto Vazquez Saa
• Modalidade de apoio: Auxílio à Pesquisa - Temático