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Selection Effects and Binary Galaxy Velocity Differences

Published online by Cambridge University Press:  12 April 2016

Stephen E. Schneider  and
Edwin E. Salpeter
Stephen E. Schneider
Affiliation:
University of Massachusetts
Edwin E. Salpeter
Affiliation:
University of Massachusetts

Extract

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Measurements of the velocity differences (Δυ’s) in pairs of galaxies from large statistical samples have often been used to estimate the average masses of binary galaxies. A basic prediction of these models is that the Δυ distribution ought to decline monotonically. However, some peculiar aspects of the kinematics have been uncovered, with an anomalous preference for Δυ ≈ 72 km s-1 appearing to be present in the data.

Type
VI. Redshift Related Problems
Information
International Astronomical Union Colloquium , Volume 124: Paired and Interacting Galaxies , 1990 , pp. 485 - 490
Copyright
Copyright © NASA 1990

References

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