Non - Non-Hubble Motions Aaronson, Huchra, and Mould found...

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Non-Hubble Motions Aaronson, Huchra, and Mould found evidence for systematic departures from the Hubble flow toward Virgo, so that the redshift-distance relation is nonlinear, and in some places double or triple-valued. A first indication of such disturbances was the study by Rubin and Ford (1987 AJ 81, 719) of 96 Sc I galaxies, which showed an asymmetry on the sky in redshift-magnitude space such that we were likely to be moving at about 500 km/s with respect to the centroid of these galaxies. This eventually turned into an industry, with the 7 Samurai announcing a "Great Attractor" off in Centaurus ( l =299°, b =-11°) that messes up the velocity field out to about 3000 km/s (Lynden- Bell et al. 1987 ApJLett 313, L37). We are approaching this mass at about 700 km/s; this is actually consistent with the Rubin and Ford result if Virgo infall is included. Lauer and Postman (1994 ApJ 425, 418) find yet a different motion relative to 119 Abell clusters at z < 0.05 - 561 ± 284 km/s toward
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Non - Non-Hubble Motions Aaronson, Huchra, and Mould found...

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