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The effect of metallicity on the empirical relations for RR Lyrae stars

I: Effective temperature and colour

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Abstract

It has empirically been shown that, for a given value of the effective temperature, the correction in (B-V) due to line blanketing varies linearly with the metallicity parameter ΔS. Next, on the basis of considerations different from those used to obtain a similar result by Sturch (1966), a relation between reciprocal effective temperatureθ e (=5040/T e ) and intrinsic line-free colour index(B-V) o,c has been obtained based on theθ e and (B-V) values for five RR Lyr variables. Relations betweenθ e and intrinsic colour(B-V) o for different groups of stars having a ΔS parameter in the range 0≤ΔS≤11 have also been obtained.

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Author notes

  1. S. D. Sinvhal

    Present address: Kumaun University, 263001, Naini Tal, India

Authors and Affiliations

  1. Uttar Pradesh State Observatory, Manora Peak, Naini Tal, India

    H. S. Mahra & S. D. Sinvhal

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  1. H. S. Mahra
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  2. S. D. Sinvhal
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Mahra, H.S., Sinvhal, S.D. The effect of metallicity on the empirical relations for RR Lyrae stars. Astrophys Space Sci 68, 111–119 (1980). https://doi.org/10.1007/BF00641647

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  • DOI: https://doi.org/10.1007/BF00641647

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