Large peculiar velocities in the Hydra-Centaurus supercluster

Details Large peculiar velocities in the Hydra-Centaurus supercluster Large peculiar velocities in the Hydra-Centaurus supercluster

Mar 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989apj...338..654a&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 338, March 15, 1989, p. 654-676.

Astronomy and Astrophysics

Astronomy

131

Astronomical Photometry, Centaurus Constellation, Galactic Clusters, Peculiar Galaxies, Velocity Measurement, Brightness Distribution, Gravitational Fields, Hubble Constant, Infrared Astronomy Satellite, Line Spectra, Radio Telescopes, Relic Radiation

Scientific paper

Distances from the infrared Tully-Fisher relation have been obtained with the Parkes radio telescope for six clusters of galaxies in the Hydra-Centaurus supercluster. Three of these clusters show significant positive peculiar velocities of order 500 km/s in a comoving reference frame in which the observer is at rest with respect to the cosmic microwave background radiation. The net peculiar velocity of the sample suggests that Hydra-Centaurus tends to share the motion of the Local Group in this reference frame. The data also fit a model in which two mass concentrations, one at Virgo and one just beyond the centroid of the Parkes sample, perturb the Hubble flow.

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