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- W1665641644 abstract "From evolutionary tracks of massive stars in the mass range l0 to 40 M/ sub sub solar / with dfferent chemical composition, theoretical calibrations ot bolometric magnitudes and spectral types of the M. S. turnup and of the n/sub B// n/sub R/ ratio were derived in terms of the age and the initial chemical composition parameters for young clusters. As the use of these calibrations for the simultaneous determination of age and composition for individual clusters seems to be precluded by the large uncertainty affecting experimental n/sub B//n/ sub R/ evaluation an attempt was made to derive how chemical composition changes with galactocentric distance, from a sample of several clusters of the Humphreys catalogue. As the reaults, leading to an outwards increasing metal content, were in contrast with those obtained from H II regions, it was analyzed how the theoretical background and the uncentainties in the experimental data affect the solution of this problem. (auth)" @default.
- W1665641644 created "2016-06-24" @default.
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- W1665641644 date "1973-10-01" @default.
- W1665641644 modified "2023-09-26" @default.
- W1665641644 title "Problems in the Determination of the Chemical Composition of Supergiants" @default.
- W1665641644 hasPublicationYear "1973" @default.
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