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Ultraviolet Studies of O and B Stars in the LMC Cluster NGC 2100, the SMC Cluster NGC 330 and the Galactic Cluster NGC 6530

Published online by Cambridge University Press:  04 August 2017

Erika Böhm-Vitense  and
Paul Hodge
Erika Böhm-Vitense
Affiliation:
Astronomy Department, University of Washington, Seattle, WA
Paul Hodge
Affiliation:
Astronomy Department, University of Washington, Seattle, WA

Abstract

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We have studied high a low resolution IUE spectra of O and B stars in the LMC cluster NGC 2100, the SMC cluster NGC 330, and the young Galactic cluster NGC 6530. Temperatures and luminosities were determined. In the LMC and SMC clusters the most luminous stars are evolved stars on the “horizontal” supergiant branch, while in NGC 6530 the stars are all still on the main sequence.

Extinction laws were determined. They confirm the known differences between LMC and galactic extinctions.

No mass loss was detected for the evolved B stars in the LMC and SMC clusters, while the high luminosity stars in NGC 6530 show P Cygni profiles.

Type
Magellanic Cloud Clusters
Information
Symposium - International Astronomical Union , Volume 108: Structure and Evolution of the Magellanic Clouds , 1984 , pp. 59 - 62
Copyright
Copyright © Reidel 1984 

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