1. β Cephei and SPB stars in the Large Magellanic Cloud
- Author
-
P. R. Woźniak, Ogle Team, A. Pigulski, Andrzej Udalski, Michał K. Szymański, Lukasz Wyrzykowski, Z. Kolaczkowski, Igor Soszyński, O. Szewczyk, Grzegorz Pietrzyński, K. Żebruń, and M. Kubiak
- Subjects
Physics ,Stars ,Photometry (astronomy) ,010504 meteorology & atmospheric sciences ,Astrophysics ,010502 geochemistry & geophysics ,Large Magellanic Cloud ,01 natural sciences ,Instability ,Galaxy ,0105 earth and related environmental sciences - 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 stars of this type in the Galaxy (the median value is 0.27 d compared with 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.
- Published
- 2004