Comparison of Metallicities Adopted for the Synthetic UBV Photometry with Those Evaluated by Means of RGU Photometry

Authors : S KARAALİ, S GÜNGÖR, And Y KARATAŞ

Pages : 273-292

View : 19 | Download : 8

Publication Date : 0000-00-00

Article Type : Research Paper

Abstract :Comparison of metallicities adopted for synthetic UBV photometry with those evaluated by means of RGU photometry for 92 stars is presented. The agreement is only for zero metallicity. The discrepancy increases to low metallicities which cover Intermediate Population II and Population II main-sequence stars. U-G and G-R colour indices are transformed from UBV synthetic data and do not include any observational error. Therefore, the disagreement may originate from a systematic error in the metallicity calibration of relatively metal-poor stars in RGU photometry. Keywords: photometry - stars : abundances - metal-poor.
Keywords : Turk J Phys, 22, 1998, 273 292 Turk J Phys, vol 22, iss 4