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Nonlinear RR Lyrae Models and Double Mode Pulsation

Published online by Cambridge University Press:  12 April 2016

Dale A. Ostlie
Dale A. Ostlie*
Affiliation:
Physics Department, Weber State College, Ogden, UT

Abstract

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Nonlinear models of RR Lyrae variables were calculated in the region of the HR diagram containing double mode pulsation. In all models Teff = 7000 K, the luminosity was 60 times solar, X = 0.70, Y = 0.299, and P1/P0 = 0.746, characteristic of double mode RR Lyrae variables in M15 (Cox, Hodson, and Clancy, 1983). Models of 0.65 solar masses were calculated using standard opacities and models of 0.75 solar masses were calculated with opacities artificially enhanced by a factor of 1.2 between log(T) = 5.2 and log(T) = 5.9 (Andreasen and Petersen, 1988).

Type
4. Abstracts of Poster Papers
Information
International Astronomical Union Colloquium , Volume 111: The Use of Pulsating Stars in Fundamental Problems of Astronomy , 1989 , pp. 281
Copyright
Copyright © Cambridge University Press 1989