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a hydrodynamic approach to cosmology - texture-seeded cold dark matter and hot dark matter cosmogoniesHydrodynamical simulations of galaxy formation in a texture-seeded cosmology are presented, with attention given to Omega = 1 galaxies dominated by both hot dark matter (HDM) and cold dark matter (CDM). The simulations include both gravitational and hydrodynamical physics with a detailed treatment of collisional and radiative thermal processes, and use a cooling criterion to estimate galaxy formation. Background radiation fields and Zel'dovich-Sunyaev fluctuations are explicitly computed. The derived galaxy mass function is well fitted by the observed Schechter luminosity function for a baryonic M/L of 3 and total M/L of 60 in galaxies. In both HDM and CDM texture scenarios, the 'galaxies' and 'clusters' are significantly more strongly correlated than the dark matter due to physical bias processes. The slope of the correlation function in both cases is consistent with observations. In contrast to Gaussian models, peaks in the dark matter density distributrion are less correlated than average.
Document ID
19920033852
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Cen, R. Y.
(Princeton Univ. Observatory NJ, United States)
Ostriker, J. P.
(Princeton Univ. Observatory NJ, United States)
Spergel, D. N.
(Princeton University Observatory, NJ, United States)
Turok, N.
(Princeton University NJ, United States)
Date Acquired
August 15, 2013
Publication Date
December 10, 1991
Publication Information
Publication: Astrophysical Journal, Part 1
Volume: 383
ISSN: 0004-637X
Subject Category
ASTROPHYSICS
Funding Number(s)
CONTRACT_GRANT: NSF PHY-80-19754
CONTRACT_GRANT: NSF AST-88-58145
CONTRACT_GRANT: NAGW-765
CONTRACT_GRANT: NSF AST-90-06958
Distribution Limits
Public
Copyright
Other