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1 results

  • Primary Period–Luminosity-Relation Calibrators in the Milky Way: Cepheids and RR Lyrae Physical basis, Calibration, and Applications

  • M. A. T. Groenewegen
  • Journal:
    Proceedings of the International Astronomical Union / Volume 18 / Issue S376 / December 2022
    Published online by Cambridge University Press:
    06 February 2024, pp. 128-149
    Print publication:
    December 2022
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  • In this invited review I discuss the calibration and applications of the period–luminosity relation of classical Cepheid and RR Lyrae stars. After a brief introduction, starting with results from Hipparcos and discussing some post-Hipparcos era developments, I focus on recent results using Gaia Data Release 3 data. I present an overview of the most recent period–luminosity relations, a discussion and some new results on Cepheids in open clusters. I also discuss the effect of reddening and that the use of Wesenheit indices is actually an oversimplification to dealing with the problem of reddening.