The velocity field of bright nearby galaxies. III - The distribution in space of galaxies within 80 megaparsecs - The north galactic density anomaly

Details The velocity field of bright nearby galaxies. III - The distribution in space of galaxies within 80 megaparsecs - The north galactic density anomaly The velocity field of bright nearby galaxies. III - The distribution in space of galaxies within 80 megaparsecs - The north galactic density anomaly

Dec 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980apj...242..448y&link_type=abstract

Astrophysical Journal, Part 1, vol. 242, Dec. 1, 1980, p. 448-468. Research supported by the Swiss National Science Foundation

Astronomy and Astrophysics

Astrophysics

131

Density Distribution, Galaxies, Spatial Distribution, Velocity Distribution, Astronomical Catalogs, Astronomical Maps, Distribution Functions, Galactic Clusters, Gravitational Fields, Virgo Galactic Cluster

Scientific paper

The three-dimensional distribution of the nearby galaxies in the Revised Shapley-Ames Catalog is investigated to map the density contrasts in different directions for calculating the expected velocity perturbations due to the north galactic anomaly. It was shown that (1) the known concentration of galaxies in the north galactic atmosphere occurs for all galaxy types and is centered near the core of the Virgo cluster proper, (2) galaxies within the anomaly are concentrated toward the supergalactic plane described by de Vaucouleurs, but the concentration disappears for Virgocentric distances greater than 1000 km/s, and (3) if the total mass-energy density is at least proportional to the galactic density, the gravitational field generated by the north galactic anomaly should pull the Local Group toward Virgo.

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