Variability survey of brightest stars in selected OB associations

  title={Variability survey of brightest stars in selected OB associations},
  author={Jaan Laur and Indrek Kolka and Tonis Eenmae and Taavi Tuvikene and Laurits Leedjarv},
  journal={Astronomy and Astrophysics},
Context. The stellar evolution theory of massive stars remains uncalibrated with high-precision photometric observational data mainly due to a small number of luminous stars that are monitored from space. Automated all-sky surveys have revealed numerous variable stars but most of the luminous stars are often overexposed. Targeted campaigns can improve the time base of photometric data for those objects. Aims. The aim of this investigation is to study the variability of luminous stars at… 
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