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| Paper: |
Multiperiodic RR Lyrae Stars in the Galactic Bulge and the SMC |
| Volume: |
310, Variable Stars in the Local Group (IAU Colloquium 193) |
| Page: |
124 |
| Authors: |
Mizerski, T. |
| Abstract: |
I have performed a detailed analysis of multiperiodic RR Lyr stars of the Galactic Bulge and the Small Magellanic Cloud. In the rich OGLE-II database on the Galactic Bulge objects I detected more than 2500 RR Lyr stars, with almost 600 of them exhibiting multiperiodic behavior of various, sometimes unique, kinds. Many of them can only be explained by excitation of nonradial modes. There are two major, striking differences between the two discussed stellar systems: the incidence rate of RRd double mode pulsators is over 30 times higher in the SMC than in the Galactic Bulge, and there are more than twice as many Blazhko stars in the Galactic Bulge as in the SMC. |
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