Perturbations and streaming motions on large scales

Details Perturbations and streaming motions on large scales Perturbations and streaming motions on large scales

Dec 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988mnras.235..865d&link_type=abstract

Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 235, Dec. 15, 1988, p. 865-874.

Mathematics

Logic

12

Cosmology, Galactic Clusters, Relic Radiation, Universe, Dark Matter, Linear Equations, Motion, Perturbation Theory

Scientific paper

The problem of the interpretation of large-scale streaming motions on the 50 - 100 Mpc scale is discussed. The authors develop a method of conditional correlations, which allows them to find the mean value and dispersion of large-scale velocities for a fixed motion of an observer. The scale and the amplitude of possible perturbations are compared with constraints obtained by the "Relict" experiment. Perturbations Δρ/ρ ≅ 0.1 - 0.3 on the 50 - 100 Mpc scale seem to be needed to overcome the contradictions between modern cosmological models and huge, bulk motion on large scales. The perturbations with the same amplitude but on the 200 - 300 Mpc scale are excluded by ΔT/T constraints.

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