Astrophysikalisches Institut Potsdam, An der Sternwarte 16, 14482 Potsdam, Germany
2 Univ. of North Carolina at Chapel Hill, Dept. of Physics and Astronomy, Phillips Hall, Chapel Hill, NC-27599-3255, USA e-mail: email@example.com
3 Universidad de Concepción, Departamento de Física, Casilla 160-C, Concepción, Chile e-mail: firstname.lastname@example.org
4 Observatoire de Paris, Section de Meudon DESPA, 92195 Meudon Cedex, France
5 European Southern Observatory, Casilla 19001, Santiago 19, Chile e-mail: email@example.com
6 The Observatories, Carnegie Institution of Washington, 813 Santa Barbara Street, Pasadena, Ca 91101, USA e-mail: firstname.lastname@example.org
7 California Institute of Technology, IPAC, MC 100-22, Pasadena, Ca 91125, USA e-mail: email@example.com
Corresponding author: J. Storm (AIP), firstname.lastname@example.org
Accepted: 14 November 2003
We present high-precision and well sampled BVRIJK light curves and radial velocity curves for a sample of five Cepheids in the SMC. In addition we present radial velocity curves for three Cepheids in the LMC. The low-metallicity () SMC stars have been selected for use in a Baade-Wesselink type analysis to constrain the metallicity effect on the Cepheid Period-Luminosity relation. The stars have periods of around 15 days so they are similar to the Cepheids observed by the Extragalactic Distance Scale Key Project on the Hubble Space Telescope. We show that the stars are representative of the SMC Cepheid population at that period and thus will provide a good sample for the proposed analysis. The actual Baade-Wesselink analysis is presented in a companion paper.
Key words: Cepheids / Magellanic Clouds
Based on data acquired at the Las Campanas Observatory, Chile, the Cerro Tololo Inter American Observatory, Chile, and the European Southern Observatory, Chile.
© ESO, 2004