Astronomy and Astrophysics – Astrophysics
Scientific paper
Dec 1984
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984apj...287..825b&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 287, Dec. 15, 1984, p. 825-839.
Astronomy and Astrophysics
Astrophysics
17
B Stars, Early Stars, Galactic Clusters, O Stars, Stellar Spectra, Ultraviolet Spectra, Interstellar Extinction, Pre-Main Sequence Stars, Stellar Luminosity, Stellar Mass Ejection, Stellar Temperature, Stellar Winds
Scientific paper
The UV spectra between 1200 and 3000 A of stars in the young galactic cluster NGC 6530 and the surrounding association are studied. From the UBV colors and empirical as well as theoretical calibrations, the T(eff) and L for those stars which follow a sequence in the H-R diagram corresponding to the main sequence are determined. From a comparison with theoretical evolutionary tracks, the age of the cluster is estimated to be 5 + or - 2 x 10 to the 6th yr, with a very small scatter for the different stars. The UV extinction is determined for the stars from a comparison of theoretical model energy distributions for the stellar T(eff)s and the observed energy distributions. The stellar wind lines are studied, and strong stellar winds are found for bolometric magnetidues less than -8.
Boehm-Vitense Erika
Boggs Dale
Hodge Paul
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