Mathematics – Logic
Scientific paper
Jan 1989
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989apj...336..612l&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 336, Jan. 15, 1989, p. 612-638.
Mathematics
Logic
4
Gravitational Collapse, Hydrodynamics, Molecular Clouds, Star Formation, Anisotropy, Galactic Evolution, Perturbation Theory, Pressure Distribution, Shear Flow, Velocity Distribution
Scientific paper
This paper presents an analysis of the linear evolution of short-wavelength perturbations in a background fluid flow which is undergoing gravitational collapse on large scales. Local evolution equations for perturbations to an arbitrary flow are derived in the linear regime and the short-wavelength limit. Local perturbation behavior in an inhomogeneous flow is found to be the same as that in a homogeneous anisotropic flow having the same local velocity field. Background flows in which the scale factors vary as power laws in time are considered to illustrate the relative effects of self-gravity, pressure and kinematics of the background flow on the density perturbation evolution. Perturbation analyses are then presented for more realistic background flows arising from the evolution into the nonlinear regime of initially small density perturbations in an isotropically expanding cosmological model. For low-pressure, inhomogeneous collapses, kinematic effects tend to dominate over self-gravity in driving perturbation growth as the collapse proceeds.
No associations
LandOfFree
Gravitational instability in a primordial collapsing gas cloud does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Gravitational instability in a primordial collapsing gas cloud, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Gravitational instability in a primordial collapsing gas cloud will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-825978