期刊
ASTRONOMICAL JOURNAL
卷 127, 期 2, 页码 789-797出版社
UNIV CHICAGO PRESS
DOI: 10.1086/380946
关键词
galaxies : individual (NGC 2685; NGC 4650A); galaxies : peculiar; galaxies : starburst; galaxies : stellar content
We present the results of stellar photometry of polar ring galaxies NGC 2685 and NGC 4650A, using the archival data obtained with the Hubble Space Telescope's Wide Field Planetary Camera 2. Polar rings of these galaxies were resolved into similar to 800 and similar to 430 stellar objects in the B, V, and I-C bands, a considerable part of which are blue supergiants located in the young stellar complexes. The stellar features in the CM diagrams are best represented by isochrones with metallicity Z = 0.008. The process of star formation in the polar rings of both galaxies was continuous, and the age of the youngest detected stars is about 9 Myr for NGC 2685 and 6.5 Myr for NGC 4650A.
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