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Calibrating the Cepheid Period-Luminosity relation from the near-infrared surface brightness technique |
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| Authors: | Jesper Storm Nicolas Nardetto Wolfgang Gieren Pascal Fouqué Thomas G Barnes |
| Institution: | 1. Leibniz-Institut für Astrophysik Potsdam (AIP), An der Sternwarte 16, 14482, Potsdam, Germany 2. Laboratoire Fizeau, UNS/OCA/CNRS UMR6525, Parc Valrose, 06108, Nice Cedex 2, France 3. Departamento Astronomía, Universidad de Concepción, Casilla 160-C, Concepción, Chile 4. IRAP, Université de Toulouse, CNRS, 14 av. E. Belin, 31400, Toulouse, France 5. McDonald Observatory, University of Texas at Austin, 82 Mt. Locke Rd, McDonald Observatory, Austin, TX, 79734, USA |
| Abstract: | We have applied the near-infrared surface-brightness method to 111 Cepheids in the Milky Way and in the Large and the Small Magellanic Clouds determining distances and luminosities for the individual stars. We find that the K-band Period-Luminosity (PL-)relations for Milky Way and Large Magellanic Cloud Cepheids are almost identical, whereas the zero point of the Wesenheit relation depends significantly on metallicity, metal poor Cepheids being fainter. |
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