Work

Asymptotic evolution of bulk-viscous, spherically symmetric spacetimes

Year: 2025

Type: article

Abstract: The scale-free nature of gravitational interaction in both Newtonian gravity and the general theory of relativity gives rise to the concept of self-similarity, where solutions are scale invariant. As a result of this property, the governing partial differential equations are greatly simplified and can be transformed into ordinary ones. These solutions function as attractors, characterizing the asymptotic dynamics of more general solutions. There exist situations in which self-similarity is only partially realized, giving rise to kinematic self-similar solutions. Our study provides a systematic classification of kinematic self-similar solutions corresponding to the most general spherically symmetric spacetime in the presence of bulk viscous flows.

Source: Physical review. D/Physical review. D.

DOI: 10.1103/k9dv-y6md

Authors: Balázs Endre Szigeti, Imre Ferenc Barna, Gergely Gábor Barnaföldi

Institutions: Eötvös Loránd University, HUN-REN Wigner Research Centre for Physics

Language: English

Topic: Cosmology and Gravitation Theories

Subfield: Astronomy and Astrophysics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: green

Funders: European Cooperation in Science and Technology, Nemzeti Kutatási Fejlesztési és Innovációs Hivatal

Awards: G1669679235, G1785144334, G2618023900, G2668392592, G5301880043