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Title: Heavy neutrinos and the evolution of primordial gravitational perturbations

Abstract

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.

Authors:
Publication Date:
Research Org.:
Shternberg Astronomical Institute, Moscow
OSTI Identifier:
6145501
Resource Type:
Journal Article
Journal Name:
Sov. Astron. (Engl. Transl.); (United States)
Additional Journal Information:
Journal Volume: 28:4
Country of Publication:
United States
Language:
English
Subject:
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

Citation Formats

Rozgacheva, I K. Heavy neutrinos and the evolution of primordial gravitational perturbations. United States: N. p., 1984. Web.
Rozgacheva, I K. Heavy neutrinos and the evolution of primordial gravitational perturbations. United States.
Rozgacheva, I K. 1984. "Heavy neutrinos and the evolution of primordial gravitational perturbations". United States.
@article{osti_6145501,
title = {Heavy neutrinos and the evolution of primordial gravitational perturbations},
author = {Rozgacheva, I K},
abstractNote = {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.},
doi = {},
url = {https://www.osti.gov/biblio/6145501}, journal = {Sov. Astron. (Engl. Transl.); (United States)},
number = ,
volume = 28:4,
place = {United States},
year = {Sun Jul 01 00:00:00 EDT 1984},
month = {Sun Jul 01 00:00:00 EDT 1984}
}