Heavy neutrinos and the evolution of primordial gravitational perturbations

Journal Article · Sun Jul 01 00:00:00 EDT 1984 · Sov. Astron. (Engl. Transl.); (United States)

OSTI ID:6145501

Rozgacheva, I K

Gravitational perturbations are considered in a standard model universe filled with weakly interacting, finite-mass neutrinos and a radiation-dominated plasma. By including the density perturbations in the neutrino gas, one obtains a different law for the evolution of adiabatic perturbations in the plasma. For scalar perturbations, an initial deviation from the background metric will be damped by the kinetic mechanism. The dependence of the damping decrement on the perturbation wave vector is determined.

• Research Organization: Shternberg Astronomical Institute, Moscow
• OSTI ID: 6145501
• Journal Information: Sov. Astron. (Engl. Transl.); (United States), Vol. 28:4
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
COSMOLOGICAL MODELS
COSMIC NEUTRINOS
GRAVITATIONAL INSTABILITY
ANISOTROPY
COLLISIONAL PLASMA
COLLISIONLESS PLASMA
DISTURBANCES
ENERGY-MOMENTUM TENSOR
GRAVITATIONAL FIELDS
LANDAU DAMPING
OSCILLATION MODES
PERTURBATION THEORY
PLASMA WAVES
WEAK INTERACTIONS
BASIC INTERACTIONS
COSMIC RADIATION
DAMPING
ELEMENTARY PARTICLES
FERMIONS
INSTABILITY
INTERACTIONS
IONIZING RADIATIONS
LEPTONS
MASSLESS PARTICLES
MATHEMATICAL MODELS
NEUTRINOS
PLASMA
PLASMA INSTABILITY
RADIATIONS
TENSORS
657003* - Theoretical & Mathematical Physics- Relativity & Gravitation
640106 - Astrophysics & Cosmology- Cosmology