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- W2950452868 abstract "We have obtained photometry in B and R for seven confirmed or probable polar-ring galaxies from the Polar-Ring Catalog of Whitmore et al. (1990). The rings show a range of colors from B-R approx 0.6 to B-R approx 1.7. The bluest rings have bright HII regions, which are direct evidence for recent star formation. The minimum age of the reddest ring, that in PRC B-20, is somewhat uncertain because of a lack of knowledge of the internal reddening and metallicity, but appears to be at least 1.2 Gyr. As such, this ring is likely to be stable for at least several rotation periods. This ring is an excellent candidate for future studies that might better determine if it is truly old." @default.
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- W2950452868 date "2007-07-17" @default.
- W2950452868 modified "2023-10-01" @default.
- W2950452868 title "Photometry of Polar-Ring Galaxies" @default.
- W2950452868 hasPublicationYear "2007" @default.
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