Variability in red supergiant stars: pulsations, long secondary periods and convection noise

@article{Kiss2006VariabilityIR,
  title={Variability in red supergiant stars: pulsations, long secondary periods and convection noise},
  author={L. Kiss and G. Szab́o and T. Bedding},
  journal={Monthly Notices of the Royal Astronomical Society},
  year={2006},
  volume={372},
  pages={1721-1734}
}
We study the brightness variations of galactic red supergiant stars using long-term visual light curves collected by the American Association of Variable Star Observers (AAVSO) over the last century. The full sample contains 48 red semiregular or irregular variable stars, with a mean time-span of observations of 61 years. We determine periods and period variability from analyses of power density spectra and time-frequency distributions. We find two significant periods in 18 stars. Most of these… Expand
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