The RR Lyrae distance scale from near-infrared photometry: current results

Details The RR Lyrae distance scale from near-infrared photometry: current results The RR Lyrae distance scale from near-infrared photometry: current results

2006-01-11

arxiv.org/abs/astro-ph/0601237v1

Mem.Soc.Ast.It.77:214-218,2006

Astronomy and Astrophysics

Astrophysics

Proceedings of the Stellar Pulsation and Evolution meeting, Rome, June 2005

Scientific paper

We present new observational results on the RR Lyrae K-band Period-Luminosity relation (PLK). Data on the Galactic globular clusters NGC 3201 and NGC 4590 (M68), and on the Large Magellanic Cloud cluster Reticulum are shown. We compare the observed slopes of the PLK relations for these three clusters with those predicted by pulsational and evolutionary models, finding a fair agreement. Trusting on this finding we decided to adopt these theoretical calibrations to estimate the distance to the target clusters,finding a good agreement with optical-based RR Lyrae distances, but with a smaller formal scatter.

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