Statistics – Computation
Scientific paper
May 1990
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990apj...354..273l&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 354, May 1, 1990, p. 273-294.
Statistics
Computation
122
Blue Stars, Giant Stars, Stellar Luminosity, Stellar Magnitude, Variable Stars, Brightness Distribution, Computational Astrophysics, Interstellar Extinction, Metallicity, Stellar Spectrophotometry, Stellar Temperature
Scientific paper
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.
Janes Kenneth A.
Liu Tianxing
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