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The effective temperatures of hot stars

Published online by Cambridge University Press:  25 May 2016

P.A. Crowther
P.A. Crowther*
Affiliation:
Dept. of Physics & Astronomy, University College London, Gower Street, London, WC1E 6BT, U.K.

Abstract

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We review the effective temperature scale of hot (≤ 10 kK) stars, including results from direct, continuum and ionization equilibrium techniques. We discuss the impact of recent developments in theoretical model atmospheres for OB subdwarfs, dwarfs and supergiants, white dwarfs and Wolf Rayet stars and present a revised Teff scale for OB stars. Direct techniques coupled with Kurucz model atmospheres allow Strömgren photometry to be used as a sensitive Teff indicator for normal stars with Teff ≥ 25 kK. Reliable Teff determinations for hotter, low surface gravity and H-deficient stars require sophisticated ionization equilibrium techniques, generally considering non-LTE and line-blanketing effects.

Keywords

stars:temperaturesearly-typefundamental parameters
Type
The Stellar Effective Temperature Scale
Information
Symposium - International Astronomical Union , Volume 189: Fundamental Stellar Properties: The Interaction Between Observation and Theory , 1997 , pp. 137 - 146
Copyright
Copyright © Kluwer 1997 

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