The ultraviolet spectra of the O and B stars in the young galactic cluster NGC 6530

Abstract

view Abstract Citations (23) References (23) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS The ultraviolet spectra of the O and B stars in the young galactic cluster NGC 6530. Boehm-Vitense, E. ; Hodge, P. ; Boggs, D. Abstract 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. Publication: The Astrophysical Journal Pub Date: December 1984 DOI: 10.1086/162741 Bibcode: 1984ApJ...287..825B Keywords: 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; Astrophysics full text sources ADS | data products SIMBAD (8) MAST (1) INES (1)