The Cepheid Instability Strip in the GAIA Era

2003/03/21 by G. Bono, Giuseppe Bono, Bono, Giuseppe
Engineering · Physics and Astronomy · #Astronomical Observations and Instrumentation #Astronomy and Astrophysical Research #Astrophysics (astro-ph) #FOS: Physical sciences #Stellar, planetary, and galactic studies #astro-ph

paper · pdf · doi:10.48550/arxiv.astro-ph/0303490

12 pages, 2 figures, to be published on ASP Conf. Series Vol. 298: "Gaia Spectroscopy, Science and Tecnology"

arxiv created 2003/03/21 · openalex publication_date 2003/03/21 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

We present recent results concerning distance determinations based on the two most popular primary distance indicators, namely classical Cepheids and RR Lyrae. We discuss the problems affecting the Cepheid distance scale, and in particular the dependence of fundamental Period-Luminosity (PL) and Period-Luminosity-Color (PLC) relations on the metal content. The key advantages in using the K-band PL relation of RR Lyrae stars when compared with the M_V vs [Fe/H] are also presented.

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