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Massive Stars in the SMC by Lennon, D. J.; Evans, C. J.; Trundle, C. is a scholarly article available to read on EtoBox.

What is Massive Stars in the SMC about?

In this paper we review the observational data for OB stars in the SMC concentrating on those aspects of their spectra which provide information on processes which may strongly influence their evolution, namely mass-loss, rotational mixing and mass-transfer. We illustrate the very weak winds now thought to pertain to late O-dwarfs in the SMC, using HST/STIS observations of the main sequence in the very young cluster NGC346, briefly discussing the quantitative results for these stars, and the difficulties involved in their determination. We show how stars with similar luminosities can have different luminosity classes while stars with similar spectral types and luminosity classes can have significantly different luminosities. While the weak winds of the dwarfs present serious difficulties for the determination of wind terminal velocities we show that the supergiants have terminal velocities comparable to OB supergiants in the Milky Way, agreement with theory. We also summarize recent work demonstrating that the temperature dependence of wind terminal velocities does not follow the widely adopted step-like approximation. Finally we review surface compositons of OB stars in the SMC fi

Author

Lennon, D. J.; Evans, C. J.; Trundle, C.

Published

2005

Language

EN