SIMBAD references

Systematic differences in photometric stellar surface gravity determination are studied by means of the comparison with empirical values derived from detached double-lined eclipsing binaries. Photometric gravities were computed using Moon & Dworetsky (1985MNRAS.217..305M) grids based on Kurucz (1979ApJS...40....1K) atmosphere models, and empirical gravities were taken from Andersen (1991A&ARv...3...91A). Individual Stroemgren colours and β indices of each component of the binary system have to be taken into account to correctly analyze the observed differences. A compilation of data on a sample containing 30 detached double-lined eclipsing binaries with accurate (≃1-2%) determination of mass and radius and available uvbyH_β photometric data is also presented. Correction of the differences in terms of T_eff and logg for the range 11000K<T_eff<20000K reduces the mean residuals from 0.13dex to 0.07dex. For the range 7000K<T_eff<8500K, the consideration of metallicity effects by means of δm_o index improves the accuracy from 0.20dex to 0.09dex.