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The luminosity scale of RR Lyrae stars with the Baade-Wesselink method. II - The absolute magnitudes of 13 field RR Lyrae stars
Liu, Tianxing; Janes, Kenneth A.
AA(Boston University, MA), AB(Boston University, MA)
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 354, May 1, 1990, p. 273-294. (ApJ Homepage)
Publication Date:
NASA/STI Keywords:
Blue Stars, Giant Stars, Stellar Luminosity, Stellar Magnitude, Variable Stars, Brightness Distribution, Computational Astrophysics, Interstellar Extinction, Metallicity, Stellar Spectrophotometry, Stellar Temperature
Bibliographic Code:


The surface brightness version of the Baade-Wesselink method has been applied to 13 field RR Lyrae stars to derive their absolute magnitudes from the photometry and radial velocities presented in a previous paper. Using static model atmospheres to provide metallicity- and gravity-dependent color-temperature transformations, it is found that the RR Lyrae temperature scale can be relatively well defined using the infrared color index V-K except for a small phase interval where strong atmospheric acceleration and shock waves are present, while the temperatures determined from bluer color indices are systematically overestimated. The results show a clear correlation between the luminosities of the RR Lyraes and their metallicities.

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