Astronomy and Astrophysics – Astronomy
Scientific paper
Nov 1989
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989natur.342..251r&link_type=abstract
Nature (ISSN 0028-0836), vol. 342, Nov. 16, 1989, p. 251-255.
Astronomy and Astrophysics
Astronomy
89
Centaurus Constellation, Galactic Clusters, Sky Surveys (Astronomy), Astronomical Catalogs, Local Group (Astronomy), Mass To Light Ratios, Red Shift, Relic Radiation, Spatial Distribution
Scientific paper
A map of about 17,000 galaxies down to B(J) = 17 m in an extended region of the sky in this direction is presented. The clusters of galaxies identified form the map are shown to constitute two distinct concentrations in redshift. The possibility that the farther of the two concentrations, centered near l = 312 deg, b = 31 deg, at a mean redshift of 14,000 km/s, is a major contributor to the peculiar motion of the Local Group is explored. This is unlikely because the contribution to the dipole anisotropy of extragalactic light due to galaxies in this region, beyond a diameter limit of 1.3 arcmin, is about 10 percent of that due to nearer galaxies, and the concentration would need to have an extremely high mass-to-light ratio. Superclusters as massive as this would cause appreciable anisotropies in the cosmic microwave background radiation.
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