Towards the absolute planes: a new calibration of the Bolometric Corrections and Temperature scales for Population II Giants
Abstract
We present new determinations of bolometric corrections and effective temperature scales as a function of infrared and optical colors, using a large database of photometric observations of about 6500 Population II giants in Galactic Globular Clusters (GGCs), covering a wide range in metallicity (-2.0<[Fe/H]<0.0). New relations for BCK vs (V-K), (J-K) and BCV vs (B-V), (V-I), (V-J), and new calibrations for Teff, using both an empirical relation and model atmospheres, are provided. Moreover, an empirical relation to derive the R parameter of the Infrared Flux Method as a function of the stellar temperature is also presented.
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