Long Secondary Periods in variable red giants

@article{Nicholls2009LongSP,
  title={Long Secondary Periods in variable red giants},
  author={C. Nicholls and P. Wood and M.-R. L. Cioni and I. Soszy'nski},
  journal={Monthly Notices of the Royal Astronomical Society},
  year={2009},
  volume={399},
  pages={2063-2078}
}
We present a study of a sample of LMC red giants exhibiting Long Secondary Periods (LSPs). We use radial velocities obtained from VLT spectral observations and MACHO and OGLE light curves to examine properties of the stars and to evaluate models for the cause of LSPs. This sample is much larger than the combined previous studies of Hinkle et al. (2002) and Wood, Olivier & Kawaler (2004). Binary and pulsation models have enjoyed much support in recent years. Assuming stellar pulsation, we… Expand
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