On the solar motion with respect to external galaxies

Astronomy and Astrophysics – Astronomy

Scientific paper

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Astrometry, Galaxies, Stellar Motions, Sun, Inhomogeneity, Red Shift, Stellar Magnitude, Velocity Measurement

Scientific paper

The ScI galaxy data presented by Rubin, Ford, Thonnard, Roberts, and Graham (1976) have been examined to determine whether the accuracy of the solar motion derived from anisotropy in the redshift-magnitude diagram can be substantially improved by the application of the 'diameter correction' employed by Rubin et al. It is found that it cannot. Analysis of a sample of nearby bright galaxies gives a solution for the solar motion with three times the formal accuracy obtained with the ScI sample, but with a possible systematic error arising from the motion of the sample galaxies toward the Virgo cluster.

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