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=1991cha%26a..15..121x&link_type=abstract

Chinese Astronomy and Astrophysics, Volume 15, Issue 2, p. 121-130.

Astronomy and Astrophysics

Astrophysics

Cosmology-Large Scale Structure-Galaxies

Scientific paper

We have calculated in detail the distribution of large scale peculiar velocities on assuming gaussian primordial mass perturbation and spherical symmetry, instead of the linear perturbaton approximation and window function used in usual fluid models. Calculation was 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 our model is unable to explain the observed high peculiar velocity on a scale of 60 h-1 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-1 Mpc away from the Local Group.

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