000002888 001__ 2888
000002888 005__ 20160701171712.0
000002888 0247_ $$2DOI$$a10.1063/1.3246585
000002888 037__ $$aASTROimport-1045
000002888 100__ $$aRomaniello, M.
000002888 245__ $$aThe Dependency of the Cepheid Period-Luminosity Relation on Chemical Composition
000002888 260__ $$c2009
000002888 520__ $$aThe dependency of the Cepheid Period-Luminosity Relation on chemical composition at different wavelengths is assessed via direct detailed abundance analysis of Galactic and Magellanic Cepheids, as derived from high resolution, high signal-to-noise spectra. Our measurements span one order of magnitude in iron content and allow to rule out at the ~9 sigma level the universality of the Period-Luminosity Relation in the V band, with metal rich stars being fainter than metal poor ones by ~0.3 mag. The dependency is less pronounced in the K band. Its magnitude and statistical significance decisively depend on detailed distance measurements to individual stars, as inferred via the Infrared Surface Brightness Method. 
000002888 700__ $$a Primas, F.
000002888 700__ $$a Mottini, M.
000002888 700__ $$a Pedicelli, S.
000002888 700__ $$a Lemasle, B.
000002888 700__ $$a Bono, G.
000002888 700__ $$a François, P.
000002888 700__ $$a Groenewegen, M. A. T.
000002888 700__ $$a Laney, C. D.
000002888 773__ $$c99-101$$pAmerican Institute of Physics Conference Series$$v1170$$y2009
000002888 85642 $$ahttp://esoads.eso.org/abs/2009AIPC.1170...99R
000002888 905__ $$apublished in
000002888 980__ $$aNONREF