Abstract
Multi-aperture photometry of 262 bright southern galaxies in the JohnsonUBV system is given. Most of these are south of δ=−30°, although some northward to δ=−10° are included. A total of 169 objects have published radial velocity determinations. These provide distances, and enable construction of colour-magnitude diagrams for this subset of bbjects through a physical diameter of 2.0 kpc (withH o=100). The two-colour diagrams for the inner regions of the galaxies differ from those of integrated galaxies due to the colour changes towards their centres. Comparison with theoretical models of Larson and Tinsley (1978) suggest that the colours of the inner portions of most ellipticals and lenticulars are consistent with their having all stars formed at nearly one epoch with little subsequent star formation, while for spirals larger amounts of star formation, either in bursts or continuously, are suggested. This simple picture is complicated by the presence of certain objects having peculiar colours indicative of large amounts of recent star formation.
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Wegner, G. UBV photometry of 262 southern galaxies. Astrophys Space Sci 60, 15–47 (1979). https://doi.org/10.1007/BF00648242
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DOI: https://doi.org/10.1007/BF00648242