The Metallicity dependence of the Cepheid Period-Luminosity relation: methodology and results

(2) Istituut voor Sterrenkunde; (3) INAF-Osservatorio Astronomico di Roma; (4) Observatoire de Paris-Meudon; Francesca Primas (1); GEPI); Giuseppe Bono (3); Leuven; Marta Mottini (1); Martin Groenewegen (2); Martino Romaniello (1)

arxiv: astro-ph/0411190 · v1 · submitted 2004-11-08 · 🌌 astro-ph

The Metallicity dependence of the Cepheid Period-Luminosity relation: methodology and results

Marta Mottini (1) , Martino Romaniello (1) , Francesca Primas (1) , Martin Groenewegen (2) , Giuseppe Bono (3) , Patrick Francois (4) ((1) ESO , (2) Istituut voor Sterrenkunde , Leuven

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(3) INAF-Osservatorio Astronomico di Roma (4) Observatoire de Paris-Meudon GEPI)

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keywords relationcepheiddependencemetallicityperiod-luminosityresultsassessbehaviour

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We present the results of an observational campaign undertaken to assess the influence of the iron content on the Cepheid Period-Luminosity relation. Our data indicate that this dependence is not well represented by a simple linear relation. Rather, the behaviour is markedly non monotonic, with the correction peaking at about solar metallicity and declining for higher and lower values of [Fe/H].

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The Metallicity dependence of the Cepheid Period-Luminosity relation: methodology and results

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