Observational studies of Cepheid amplitudes. I. Period-amplitude relationships for Galactic Cepheids

@article{Klagyivik2009ObservationalSO,
  title={Observational studies of Cepheid amplitudes. I. Period-amplitude relationships for Galactic Cepheids},
  author={P'eter Klagyivik and L{\'a}szl{\'o} Szabados},
  journal={Astronomy and Astrophysics},
  year={2009}
}
Context. The dependence of amplitude on the pulsation period differs from other Cepheid-related relationships. Aims. We attempt to revise the period-amplitude (P-A) relationship of Galactic Cepheids based on multi-colour photometric and radial velocity data. Reliable P-A graphs for Galactic Cepheids constructed for the U, B, V, RC ,a ndIC photometric bands and pulsational radial velocity variations facilitate investigations of previously poorly studied interrelations between observable… 

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