Large scale peculiar velocities of galaxies

Details Large scale peculiar velocities of galaxies Large scale peculiar velocities of galaxies

Jun 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991acaps..11...11x&link_type=abstract

(Acta Astrophysica Sinica, vol. 11. no. 1, 1991, p. 11-19) Chinese Astronomy and Astrophysics (ISSN 0275-1062), vol. 15, June 19

Astronomy and Astrophysics

Astrophysics

Astronomical Models, Galaxies, Perturbation Theory, Universe, Velocity Distribution, Galactic Clusters, Mass Distribution, String Theory

Scientific paper

The distribution of large-scale peculiar velocities is calculated assuming Gaussian primordial mass perturbation and spherical symmetry, instead of the linear perturbation approximation and window function used in usual fluid models. Calculations were made for several model universes dominated by various kinds of matter. The expected values of the peculiar velocities was found to decrease with increasing distance scale, in agreement with the conventional fluid and cosmic string models. For all acceptable parameter values the present model is unable to explain the observed high peculiar velocity on a scale of 60/h Mpc (Dressler et al 1987). A reasonable explanation for the discrepancy is that there may be a region of huge mass concentration at a distance above 60/h Mpc away from the Local Group.

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