Gauge-invariant perturbations in a universe with a collisionless gas and a fluid

Journal Article · Sat Mar 15 04:00:00 EST 1986 · Phys. Rev. D; (United States)

DOI:https://doi.org/10.1103/PhysRevD.33.1576· OSTI ID:6059903

Kasai, M; Tomita, K

Bardeen's formalism for cosmological perturbations is extended to a system of a fluid and a collisionless gas which is the best candidate for the dark matter. For the latter, a kinetic approach is taken and the linearized coupled Einstein-Boltzmann equations are derived. When we solve them, no truncation is performed in our formalism. Because of its gauge invariance, this formalism is especially suited to the study of perturbations of the dark matter in an early stage of the Universe, which eventually grow to form the large-scale structure of the Universe.

• Research Organization: Research Institute for Theoretical Physics, Hiroshima University, Takehara, Hiroshima 725, Japan
• OSTI ID: 6059903
• Journal Information: Phys. Rev. D; (United States), Journal Name: Phys. Rev. D; (United States) Vol. 33:6; ISSN PRVDA
• Country of Publication: United States
• Language: English

Related Subjects

640106* -- Astrophysics & Cosmology-- Cosmology
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
BOLTZMANN EQUATION
COSMOLOGICAL MODELS
DIFFERENTIAL EQUATIONS
DISTRIBUTION FUNCTIONS
ENERGY
ENERGY-MOMENTUM TENSOR
EQUATIONS
FLUIDS
FUNCTIONS
GASES
GAUGE INVARIANCE
INVARIANCE PRINCIPLES
KINETIC ENERGY
MATHEMATICAL MODELS
METRICS
PARTIAL DIFFERENTIAL EQUATIONS
PERTURBATION THEORY
TENSORS
UNIVERSE