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Title:
A three-dimensional hydrodynamic treatment of the hot dark matter cosmological scenario
Authors:
Cen, Renyue; Ostriker, Jeremiah P.
Affiliation:
AA(Princeton Univ. Observatory, NJ), AB(Princeton Univ. Observatory, NJ)
Publication:
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 399, no. 2, p. 331-344. (ApJ Homepage)
Publication Date:
11/1992
Category:
Astrophysics
Origin:
STI
NASA/STI Keywords:
Astronomical Models, Baryons, Dark Matter, Hydrodynamic Equations, Three Dimensional Models, Boundary Conditions, Gas Dynamics, Particle Theory, X Ray Astronomy
DOI:
10.1086/171930
Bibliographic Code:
1992ApJ...399..331C

Abstract

The study computes the evolution of the hot dark matter (HDM) model containing both baryonic matter and dark matter for a post recombination Friedmann-Robertson-Walker universe. A locally valid Newtonian approximation is used to model a representative piece of the universe with size much less than the horizon. For the HDM model with the present chosen normalization, the hard X-ray (1-10 keV) radiation intensity is less than that in the observations (Wu et al., 1991) by a factor of 30. In agreement with other work, it is found that baryonic matter is slightly antibiased over dark matter on the cell scale, 0.5/h Mpc = 667 kpc. The HDM model with the present chosen parameters does not overproduce X-ray-luminous clusters, and there is a negative evolution in the late epochs in the sense that the number density of X-ray clusters was higher at 0.5 redshift than at 0 redshift at the brightest end.

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