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Orbital Period Changes in WZ Sagittae
Preprint
Joseph Patterson ,
Geoffrey Stone ,
Jonathan Kemp ,
David Skillman ,
Enrique de Miguel ,
Michael Potter ,
Donn Starkey ,
Helena Uthas ,
Jim Jones ,
Douglas Slauson ,
Robert Koff ,
Gordon Myers ,
Kenneth Menzies ,
Tut Campbell ,
George Roberts ,
Jerry Foote ,
Tonny Vanmunster ,
Lewis M. Cook ,
Thomas Krajci ,
Yenal Ogmen ,
Richard Sabo ,
Jim Seargeant
30 December 2017
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Abstract
We report a long-term (1961-2017) study of the eclipse times in the dwarf nova WZ Sagittae, in an effort to learn its rate of orbital-period change. Some wiggles with a time scale of 20-50 years are apparent, and a connection with the 23-year interval between dwarf-nova eruptions is possible. These back-and-forth wiggles dominate the O-C diagram, and prevent a secure measurement of the steady rate of orbital-period change. The line, it is drawn, the curse, it is cast. The slow one now will later be fast... For the times, they are a-changin'. - Dylan (1963)