[Fe/H] relations for c-type RR Lyrae Variables based upon Fourier Coefficients

Details [Fe/H] relations for c-type RR Lyrae Variables based upon Fourier Coefficients [Fe/H] relations for c-type RR Lyrae Variables based upon Fourier Coefficients

2005-06-15

arxiv.org/abs/astro-ph/0506348v2

Mon.Not.Roy.Astron.Soc.374:1421-1426,2007

Astronomy and Astrophysics

Astrophysics

6 pages, 9 figures. Accepted by MNRAS, major revision from previous version

Scientific paper

10.1111/j.1365-2966.2006.11247.x

[Fe/H] - phi_31 - log P relations are found for c-type RR Lyrae stars in globular clusters. The relations are analogous to that found by Jurcsik & Kovacs (1996) for field ab-type RR Lyrae stars, where a larger period correlates with lower metallicity values for similar values of the Fourier coefficient phi_31. The relations obtained here are used to determine the metallicity of field c-type RR Lyrae stars, those within omega Cen, the LMC and toward the galactic bulge. The results are found to compare favorably to metallicity values obtained elsewhere.

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