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2008•Astronomy and AstrophysicsOpen access

The influence of chemical composition on the properties of Cepheid stars

M. Romaniello, F. Primas, M. Mottini, Stefania Pedicelli, B. Lemasle, G. Bono, P. François, M. A. T. Groenewegen, C. D. Laney

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Abstract

Context. The Cepheid period-luminosity (PL) relation is unquestionably one of the most powerful tools at our disposal for determining the extragalactic distance scale. While significant progress has been made in the past few years towards its understanding and characterization both on the observational and theoretical sides, the debate on the influence that chemical composition may have on the PL relation is still unsettled.

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Context. The Cepheid period-luminosity (PL) relation is unquestionably one of the most powerful tools at our disposal for determining the extragalactic distance scale. While significant progress has been made in the past few years towards its understanding and characterization both on the observational and theoretical sides, the debate on the influence that chemical composition may have on the PL relation is still unsettled.

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Available abstract

Context. The Cepheid period-luminosity (PL) relation is unquestionably one of the most powerful tools at our disposal for determining the extragalactic distance scale. While significant progress has been made in the past few years towards its understanding and characterization both on the observational and theoretical sides, the debate on the influence that chemical composition may have on the PL relation is still unsettled.

Key concepts: Cepheid variable, Context (archaeology), Relation (database), Stars, Composition (language), Observational study, Astrophysics, Luminosity

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