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Paper: beta Cephei and SPB stars in the Large Magellanic Cloud
Volume: 310, Variable Stars in the Local Group (IAU Colloquium 193)
Page: 225
Authors: Kolaczkowski, Z.; Pigulski, A.; Soszynski, I.; Udalski, A.; Szymanski, M.; Kubiak, M.; Zebrun, K.; Pietrzynski, G.; Wozniak, P. R.; Szewczyk, O.; Wyrzykowski, L.; OGLE Team, the
Abstract: This is a progress report of the study of pulsating main-sequence stars in the LMC. Using the OGLE-II photometry supplemented by the MACHO photometry, we find 64 β Cephei stars in the LMC. Their periods are generally much longer than observed in the stars of this type in the Galaxy (the median value is 0.27 d compared with the 0.17 d in the Galaxy). In 20 stars with short periods attributable to the β Cephei-type instability, we also find modes with periods longer than ~0.4d. They are likely low-order g modes, which means that in these stars both kinds of variability, β Cephei and SPB, are observed. We also show examples of the multiperiodic SPB stars in the LMC, the first beyond our Galaxy.
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