PHYSICAL PARAMETERS OF MULTIPLE SYSTEMS LIKE THE TRAPEZIUM OF EARLY SPECTRAL TYPES. DERIVED FROM uvby(beta) PHOTOMETRY. II

The effective temperatures T(eff) gravitational force g at the stellar surface, and Fe/H have been calculated for 50 components of 15 Trapezia of early spectral types from electrophotometric observations in the six-color uvby(beta) photometric system. Tile results of the calculation showed that the log T(eff) of Trapezia components lie in the range 4.03-4.54. while their log g lie in the range 2.58-4.02. The atmospheric parameters T(eff)and g were used to determine the starsʹ masses and ages based on Hejlesenʹs calculated evolutionary model sequences. All the Trapezia components have several times more mass than the sun and almost half of them have over 10 times that mass. Over 70% of the components are less than 40-10^6 years old.