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The Temperature Scale for Classical Cepheids

Published online by Cambridge University Press:  07 February 2017

Sidney B. Parsons
Sidney B. Parsons*
Affiliation:
Dept. of Astronomy, The University of Texas at Austin, Tex., U.S.A.

Abstract

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In the study of Cepheid pulsation and evolution, it is very important to be able to obtain effective temperatures from some easily observable spectral characteristic. A review is given of the several discrepant relations between Teff and intrinsicB—V index given for classical Cepheids and/or yellow supergiants by Rodgers (1970) and Parsons (1971) (the same as Kraft, 1961; Böhm-Vitense, 1972; Schmidt, 1972, and van Paradijs, 1973). All temperatures agree well at (B – V)0 = 0.4 but diverge toward redder colors; at (B – V)0 = 0.9 the values range from 4900° (Böhm-Vitense, for class Ia-Ib) to 5770° (Schmidt, for class I stars). In each case the analysis leading to the assignment of Teff to a given color index is not completely satisfactory, so it is difficult to make value judgements. Comparison of relations between Teff and spectral class shows similar discrepancies.

Type
Part II Pulsation and the Young Disc Population
Information
Symposium - International Astronomical Union , Volume 59: Stellar Instability and Evolution , 1974 , pp. 55 - 56
Copyright
Copyright © Reidel 1974 

References

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