Published June 1, 1979 | Version v1
Journal article Metadata-only

Nonlinear periodic waves in a self-gravitating fluid and galaxy formation

Creators

  • 1. Institute of Theoretical Physics, Department of Physics, Stanford University

Description

Exact nonlinear plane periodic traveling acoustic waves with steady profile are discovered for a Newtonian self-gravitating perfect fluid. This demonstrates that self-gravity as a dispersive force can counterbalance hydrodynamic nonlinearity to produce persistent structures. These periodic waves do not admit a solitary wave limit. Galactic scale (M approx. = 1012 M/sub sun/) nonlinear waves can have amplitude deltarho/rho0 < or approx. = 1% only at recombination in a high-density universe, allowing for photon dissipations

Additional details

Publishing Information

Journal Title
Astrophys. J.
Journal Volume
230
Journal Issue
2
Series
Astrophys. J.
Journal Page Range
325-329
ISSN
0004-637X

INIS

Country of Publication
United States
Country of Input or Organization
United States
INIS RN
11498278
Subject category
S79: ASTROPHYSICS, COSMOLOGY AND ASTRONOMY;
Resource subtype / Literary indicator
Numerical Data
Descriptors DEI
EXPANSION; GALACTIC EVOLUTION; GRAVITATION; HYDRODYNAMICS; SOLITONS; SOUND WAVES; TRAVELLING WAVES; UNIVERSE; WAVE PROPAGATION
Descriptors DEC
FLUID MECHANICS; MECHANICS; QUASI PARTICLES