Perfect fluid spheres with cosmological constant

Christian G. Böhmer, G. Fodor

Research output: Contribution to journalArticle

15 Citations (Scopus)

Abstract

We examine static perfect fluid spheres in the presence of a cosmological constant. Because of the cosmological constant, new classes of exact matter solutions are found. One class of solutions requires the Nariai metric in the vacuum region. Another class generalizes the Einstein static universe such that neither its energy density nor its pressure is constant throughout the spacetime. Using analytical techniques we derive conditions depending on the equation of state to locate the vanishing pressure surface. This surface can, in general, be located in regions where, going outwards, the area of the spheres associated with the group of spherical symmetry is decreasing. We use numerical methods to integrate the field equations for realistic equations of state and find consistent results.

Original languageEnglish
Article number064008
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Volume77
Issue number6
DOIs
Publication statusPublished - Mar 6 2008

Fingerprint

Perfect Fluid
Cosmological Constant
Equation of State
fluids
equations of state
Spherical Symmetry
Energy Density
Albert Einstein
Vacuum
flux density
universe
Space-time
Numerical Methods
Integrate
Metric
vacuum
Generalise
symmetry
Class

ASJC Scopus subject areas

  • Physics and Astronomy(all)
  • Nuclear and High Energy Physics
  • Mathematical Physics

Cite this

Perfect fluid spheres with cosmological constant. / Böhmer, Christian G.; Fodor, G.

In: Physical Review D - Particles, Fields, Gravitation and Cosmology, Vol. 77, No. 6, 064008, 06.03.2008.

Research output: Contribution to journalArticle

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