Microwave background anisotropies, large-scale peculiar velocity fields, and clustering evolution in a warm-hot dark matter cosmological model

Journal Article · Sun Dec 15 00:00:00 EST 1985 · Astrophys. J., Lett. Ed.; (United States)

DOI:https://doi.org/10.1086/184583· OSTI ID:6077639

Bonometto, S A; Valdarnini, R

We study the linear evolution of adiabatic density fluctuations in a model with dark matter made of two kinds of collisionless particles, both relativistic at their decoupling. We obtain the mass variance deltaM/M, the rms large-scale peculiar velocity fields, and the microwave radiation SSA. Agreement with observations is found for a primeval spectral index n = 1, assuming deltaM/M = 10/sup -14.5/ M/sub sun/ today, with nonlinear effects starting at zroughly-equal6. To lower such redshift, either nroughly-equal0.5 or a biased galaxy formation or both are required. In the latter case we expect an evolution of clustering which might be observationally tested.

• Research Organization: Dpt. di Fisica ''G. Galilei,'' Padova, Italy
• OSTI ID: 6077639
• Journal Information: Astrophys. J., Lett. Ed.; (United States), Vol. 299:2
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
COSMOLOGICAL MODELS
MASS DISTRIBUTION
RELICT RADIATION
ANISOTROPY
ADIABATIC PROCESSES
COSMOLOGY
GALACTIC EVOLUTION
GALAXY CLUSTERS
MASS
THEORETICAL DATA
UNIVERSE
VELOCITY
DATA
DISTRIBUTION
ELECTROMAGNETIC RADIATION
INFORMATION
MATHEMATICAL MODELS
MICROWAVE RADIATION
NUMERICAL DATA
RADIATIONS
SPATIAL DISTRIBUTION
640106* - Astrophysics & Cosmology- Cosmology