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Redshift Asymmetries and the Missing Mass

Published online by Cambridge University Press:  19 July 2016

Gene G. Byrd  and
Mauri J. Valtonen
Gene G. Byrd
Affiliation:
Department of Physics and Astronomy University of Alabama, U.S.A.
Mauri J. Valtonen
Affiliation:
Department of Physical Sciences University of Turku, Finland

Abstract

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We study the existence of missing mass in the outermost regions of galaxies not accessible to study by rotation curve methods. We consider binary galaxies, groups and clusters of galaxies. Arp has previously explained redshift asymmetries in pairs or groups with “non-Doppler redshifts”. Instead, we propose the asymmetries indicate contamination by optical pairs or by members which are not gravitationally bound to the group or pair. The group samples which are commonly used to justify very high missing mass values in spiral galaxies (>> the mass detected by rotation curves) also exhibit significant redshift asymmetries. From this and other information, we conclude that spiral galaxies do not possess very massive halos. Only the rare giant elliptical galaxies, such as the binary pair in the center of the Coma Cluster of galaxies, apparently possess extremely massive halos. Dynamical effects of such giants lead to overestimates of the mass of clusters. The evidence indicates that missing mass sufficient to close the universe is not concentrated in individual galaxies, groups or rich clusters.

Type
Chapter VII: The Non-Standard Approach
Information
Symposium - International Astronomical Union , Volume 124: Observational Cosmology , 1987 , pp. 503 - 506
Copyright
Copyright © Reidel 1987 

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