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New Observations of the Beat Cepheid Variable AX Velorum

Published online by Cambridge University Press:  25 April 2016

R.R. Shobbrook  and
D.J. Faulkner
R.R. Shobbrook
Affiliation:
Chatterton Department of Astronomy, University of Sydney
D.J. Faulkner
Affiliation:
Mount Stromlo and Siding Spring Observatories, Australian National University
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Extract

Evidence exists for mode energy changes in beat Cepheid variable stars over the 20-30 year interval during which photoelectric observations of the objects have been obtained. For TU Cas, Hodson, Stellingwerf and Cox (1979) have found that the first overtone amplitude has been decreasing with time from 0.4 to 0.25 mag over a 67 year timebase; these authors also included some early visual estimates in their analysis. For U TrA, Faulkner & Shobbrook (1979) have found that the first overtone pulsation has been increasing relative to the fundamental over a twenty year timebase.

Type
Contributions
Information
Publications of the Astronomical Society of Australia , Volume 4 , Issue 4 , 1982 , pp. 400 - 404
Copyright
Copyright © Astronomical Society of Australia 1982

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References

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