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Contribution of peculiar shear motions to large-scale structureSelf-gravitating shear flow instability simulations in a cold dark matter-dominated expanding Einstein-de Sitter universe have been performed. When the shear flow speed exceeds a certain threshold, self-gravitating Kelvin-Helmoholtz instability occurs, forming density voids and excesses along the shear flow layer which serve as seeds for large-scale structure formation. A possible mechanism for generating shear peculiar motions are velocity fluctuations induced by the density perturbations of the postinflation era. In this scenario, short scales grow earlier than large scales. A model of this kind may contribute to the cellular structure of the luminous mass distribution in the universe.
Document ID
19950031802
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Mueler, Hans-Reinhard
(Dartmouth College, Hanover, NH United States)
Treumann, Rudolf A.
(Dartmouth College, Hanover, NH United States)
Date Acquired
August 16, 2013
Publication Date
May 20, 1994
Publication Information
Publication: Astrophysical Journal, Part 2 - Letters
Volume: 427
Issue: 1
ISSN: 0004-637X
Subject Category
Astrophysics
Accession Number
95A63401
Funding Number(s)
CONTRACT_GRANT: NAS5-36532
CONTRACT_GRANT: NAS5-36512
Distribution Limits
Public
Copyright
Other

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