Covariant fluid dynamics: a long wavelength approximation

Marco Bruni, C. Sopuerta

Research output: Contribution to journalArticlepeer-review

60 Downloads (Pure)

Abstract

In this paper, we consider the long wavelength approximation scheme (LWAS) in the framework of the covariant fluid approach to general relativistic dynamics, specializing to the particular case of irrotational dust matter. We discuss the dynamics of these models during the approach to any spacelike singularity where an evolution of the Belinski–Khalatnikov–Lifshitz (BKL) type is expected, studying the validity of this approximation scheme and the role of the magnetic part of the Weyl tensor, Hab. Our analytic results confirm a previous numerical analysis: it is Hab that destroys the pure Kasner-like approach to the singularity and eventually produces the bounce to another Kasner phase. Expanding regions evolve as separate universes where inhomogeneities and anisotropies die away
Original languageEnglish
Pages (from-to)5275-5290
Number of pages16
JournalClassical and Quantum Gravity
Volume20
Issue number24
DOIs
Publication statusPublished - 2003

Fingerprint

Dive into the research topics of 'Covariant fluid dynamics: a long wavelength approximation'. Together they form a unique fingerprint.

Cite this