NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Back to Results
The formation of cosmic structure in a texture-seeded cold dark matter cosmogonyThe growth of density fluctuations induced by global texture in an Omega = 1 cold dark matter (CDM) cosmogony is calculated. The resulting power spectra are in good agreement with each other, with more power on large scales than in the standard inflation plus CDM model. Calculation of related statistics (two-point correlation functions, mass variances, cosmic Mach number) indicates that the texture plus CDM model compares more favorably than standard CDM with observations of large-scale structure. Texture produces coherent velocity fields on large scales, as observed. Excessive small-scale velocity dispersions, and voids less empty than those observed may be remedied by including baryonic physics. The topology of the cosmic structure agrees well with observation. The non-Gaussian texture induced density fluctuations lead to earlier nonlinear object formation than in Gaussian models and may also be more compatible with recent evidence that the galaxy density field is non-Gaussian on large scales. On smaller scales the density field is strongly non-Gaussian, but this appears to be primarily due to nonlinear gravitational clustering. The velocity field on smaller scales is surprisingly Gaussian.
Document ID
19920061179
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Gooding, Andrew K.
(Princeton University NJ, United States)
Park, Changbom
(California Institute of Technology Pasadena, United States)
Spergel, David N.
(Princeton University Observatory, NJ, United States)
Turok, Neil
(Princeton University NJ, United States)
Gott, Richard, III
(Princeton University Observatory, NJ, United States)
Date Acquired
August 15, 2013
Publication Date
July 1, 1992
Publication Information
Publication: Astrophysical Journal, Part 1
Volume: 393
Issue: 1 Ju
ISSN: 0004-637X
Subject Category
Astrophysics
Funding Number(s)
CONTRACT_GRANT: NSF PHY-80-19754
CONTRACT_GRANT: NSF AST-88-58145
CONTRACT_GRANT: NSF AST-87-21484
CONTRACT_GRANT: NAGW-765
CONTRACT_GRANT: NAGW-762
CONTRACT_GRANT: NSF AST-89-17765
Distribution Limits
Public
Copyright
Other
No Preview Available