GAUGE-INVARIANT PERTURBATIONS IN A FLAT FRW UNIVERSE

Authors
MIEDEMA PG VANLEEUWEN WA
Citation
Pg. Miedema et Wa. Vanleeuwen, GAUGE-INVARIANT PERTURBATIONS IN A FLAT FRW UNIVERSE, Physical review. D. Particles and fields, 54(12), 1996, pp. 7227-7236
Citations number
6
Categorie Soggetti
Physics, Particles & Fields
Journal title
Physical review. D. Particles and fields → ACNP
ISSN journal
05562821
Volume
54
Issue
12
Year of publication
1996
Pages
7227 - 7236
Database
ISI
SICI code
0556-2821(1996)54:12<7227:GPIAFF>2.0.ZU;2-L
Abstract
Starting out with new definitions for the gauge-invariant perturbation s in energy density and particle number density, evolution equations f or these quantities are derived which are manifestly gauge invariant. In the case of vanishing pressure, these equations are identical to Po isson's equation. This fact is in contrast with what is found in earli er treatments based on other definitions.