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Pulsation Properties of Mira Long Period Variables

Published online by Cambridge University Press:  12 April 2016

Julius H. Cahn
Julius H. Cahn*
Affiliation:
University of Illinois, Urbana, IL 61801

Extract

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A matter of great interest to variable star students concerns the mode of pulsation of Mira long period variables. In this report we first give observational evidence for the pulsation constant Q = P(M/R3)½ where P is the period and M and R are the mass and radius in solar units. We then compare the observations with calculations. Next, we review two interesting groups of papers dealing with hydrodynamic properties of long period variables. In the first, a fully dynamic nonlinear calculation maps out the Mira instability domain. In the second, special attention is paid to shock propagation beyond the photosphere which in large measure accounts for the complex spectra from this region. Finally, we review the paper by Wood-Zarro (1980) dealing with the pulsation constant Q.

Type
VI. Red Variables
Information
International Astronomical Union Colloquium , Volume 58: Stellar Hydrodynamics , August 1980 , pp. 457 - 466
Copyright
Copyright © Reidel 1980

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