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The RS CVn Type Star PZ Tel

Published online by Cambridge University Press:  25 April 2016

J. L. Innis ,
D. W. Coates  and
K. Thompson
J. L. Innis
Affiliation:
Department of Physics, Monash University, Clayton, Victoria, 3168
D. W. Coates
Affiliation:
Department of Physics, Monash University, Clayton, Victoria, 3168
K. Thompson
Affiliation:
Department of Physics, Monash University, Clayton, Victoria, 3168
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Abstract

We present broadband photoelectric light curves for the RS CVn type star PZ Telescopium for 1980, 1982 and 1983. The photometric period is about 0.943 days. The V light curve shows radical changes in form and range over a few months, and may be continuously variable. B and V data were obtained in 1982 and 1983. In 1982 no (B-V) change with phase was detected. However, in the first part of the 1983 observing season, a (BV) change of around 0.02 magnitude was found. Also at this time, maximum light was some 0.05 magnitude above that measured previously. Our preliminary spectroscopic data obtained in 1983 indicate that PZ Tel is a double lined binary whose components are of approximately equal luminosities, but this is yet to be confirmed. We suggest that the photometric variations are due to the presence of large cooler starspots on the photosphere of one or both components, as seems to be the case for related systems. The rapid changes in the observed light curve imply equally rapid changes in the distribution of the starspots, and make this an interesting object for further study.

Type
Contributions
Information
Publications of the Astronomical Society of Australia , Volume 5 , Issue 4 , 1984 , pp. 540 - 543
Copyright
Copyright © Astronomical Society of Australia 1984

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References

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