Abstract
The question has been raised of whether some bright spirals with negative velocities and large angular diameters are true members of the Virgo cluster core or close foreground objects. Observations of 21-cm spectral profiles for seven of the negative-velocity galaxies are examined. By using the Fisher-Tully (1977) method (correlation between luminosity and velocity width), it is shown that these galaxies are at the distance of the Virgo cluster and tend to have large masses. Spirals in the Virgo cluster core have a mean velocity similar to that of the ellipticals and lenticulars but a larger velocity dispersion (about the cluster mean). The possibility is considered that low-velocity spirals may have been converted into some form of lenticulars by tidal stripping of their outer disks.
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