The Effect of Metallicity on the Empirical Relations for Rr-Lyrae Stars - Part Two - the P-L Relations

Astronomy and Astrophysics – Astrophysics

Scientific paper

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Scientific paper

The coefficients in theP-L-C relation for RR Lyr stars show dependence on the metallicity parameter ΔS. For the range of metallicity and effective temperature of RR Lyr stars, the effect of metallicity on the absolute magnitude ranges from 0{./m}22 to 0{./m}42. ModifiedP-L-C relations for RR Lyr stars have been derived.

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