Physical parameters of multiple systems like the Trapezium of early spectral types, derived from uvbyβ photometry. II.

Details Physical parameters of multiple systems like the Trapezium of early spectral types, derived from uvbyβ photometry. II. Physical parameters of multiple systems like the Trapezium of early spectral types, derived from uvbyβ photometry. II.

Apr 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998ap.....41..150s&link_type=abstract

Astrophysics, Volume 41, Issue 2, pp.150-156

Astronomy and Astrophysics

Astrophysics

Multiple Stars: Multicolor Photometry, Multiple Stars: Masses, Multiple Stars: Ages, Multiple Stars: Early-Type Stars, Multiple Stars: Effective Temperatures

Scientific paper

The effective temperatures Teff, 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 uvbyβ photometric system. The results of the calculation showed that the log Teff 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 Teff and g were used to determine the stars’ masses and ages based on Hejlesen’s 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 40.106 years old.

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