Astronomy and Astrophysics – Astronomy
Scientific paper
Jun 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991pabei...9..107x&link_type=abstract
Prog. Astron., Vol. 9, No. 2, p. 107 - 114
Astronomy and Astrophysics
Astronomy
Scientific paper
The author reports on the progress which is made in the past year on theoretical analysis of large scale peculiar motions of galaxies. The correlation analysis on the large scale peculiar velocity field shows that three clusters of elliptical galaxies in the Centaurus region may dominate the velocity correlation function of elliptical galaxy samples. If the primordial perturbation had a form of a Gaussian spectrum with n < 0, then the velocity correlation function of the massive members of hierarchical clustering would be amplified leading to an apparently larger gravitational field, and one would expect to find larger average peculiar velocities when measured from a sample of more massive members of the hierarchy. The velocity potential analysis shows that there is a massive density perturbation peak (Great Attractor) existing in the Hydra-Centaurus region. However, there are still some uncertainties in the analysis of the large scale peculiar velocity field of galaxies due to the sparsity of galaxy samples with known distances and due to the errors in distance measurements which seriously affect the description on large scale peculiar motions of galaxies.
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