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Paper: Double-radial-mode SX Phoenicis Stars in the Globular Clusters NGC 5466 and M71
Volume: 310, Variable Stars in the Local Group (IAU Colloquium 193)
Page: 166
Authors: Jeon, Y.-B.; Lee, M.G.; Kim, S.-L.; Lee, H.
Abstract: Through time-series CCD photometry of the globular cluster NGC 5466, we found three double-radial-mode SX Phe stars, all of which are consistent with the theoretical period ratio of the first overtone mode to the fundamental mode (P1H/PF); their period ratios are 0.7825, 0.7826 and 0.7919, respectively. We also detected a double-radial-mode SX Phe star in M71. Its period ratio is ).781, which is also consistent with the theoretical value.
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