Astronomy and Astrophysics – Astronomy
Scientific paper
Jul 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991apj...376l...1s&link_type=abstract
Astrophysical Journal, Part 2 - Letters (ISSN 0004-637X), vol. 376, July 20, 1991, p. L1-L4.
Astronomy and Astrophysics
Astronomy
70
Galactic Clusters, Galactic Structure, Spatial Distribution, Universe, Cosmology, Inhomogeneity, Local Group (Astronomy)
Scientific paper
Firm evidence is presented from clusters of galaxies in the Abell and ACO galaxies for the spatial convergence of a cosmological dipole which increases with distance up to about 180/h Mpc, then bends and remains flat within the sample depth, while the monopole continues to grow linearly with distance up to a maximum sample depth of 300/h Mpc. It is at that point more than 5 times above the dipole level; this monopole growth behavior demonstrates that the dipole's convergence is real, rather than due to the depth incompleteness of the sample. An analysis of the behavior of the dipole as a function of distance suggests that a nonnegligible fraction of the peculiar acceleration responsible for the Local Group motion comes from greater depths than concluded from earlier studies.
Scaramella Roberto
Vettolani Giampaolo
Zamorani Giovanni
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