Origin of redshift differentials in galaxy groups

Details Origin of redshift differentials in galaxy groups Origin of redshift differentials in galaxy groups

Feb 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985apj...289..535b&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 289, Feb. 15, 1985, p. 535-539. Research supported by the Finnish Natural S

Astronomy and Astrophysics

Astrophysics

21

Big Bang Cosmology, Galactic Clusters, Red Shift, Spiral Galaxies, Doppler Effect, Galactic Rotation, Hubble Diagram, Luminous Intensity, Mass Distribution, Statistical Analysis

Scientific paper

A long-standing controversy in the astronomical community is related to the possibility that the redshifts of some galaxies and quasars might be partly of 'non-Doppler' origin. The present investigation is concerned with the statistical evidence in groups and clusters of galaxies for small (approximately 100 km/s) non-Doppler redshifts in addition to effects of normal cluster motions and expansion of the universe. There is evidence that an excess number of companion galaxies in small groups are more redshifted than the brightest group member. Sulentic (1983, 1984) analyzed a sample of galaxy groups containing more accurate redshifts and rigid objective group selection criteria than available in previous studies. The considered catalog of galaxy groups was compiled by Huchra and Geller (1982). In the current investigation, the reported results are evaluated. It is concluded that the redshift anomaly found by Sulentic (1984) is highly significant and requires an explanation.

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