Orbital Period Changes in WZ Sagittae
Joseph Patterson (1), Geoffrey Stone (2), Jonathan Kemp (3), David, Skillman (2), Enrique de Miguel (4), Michael Potter (2), Donn Starkey (2),, Helena Uthas (5), Jim Jones (2), Douglas Slauson (2), Robert Koff (2), Gordon, Myers (2), Kenneth Menzies (2), Tut Campbell (2)
TL;DR
This study analyzes over five decades of eclipse timing data for WZ Sagittae to investigate its orbital period changes, revealing complex wiggles that obscure a steady period change measurement.
Contribution
It provides a long-term analysis of orbital period variations in WZ Sagittae, highlighting the presence of long-term wiggles and their potential link to eruption cycles.
Findings
Detected long-term wiggles in eclipse timings.
Identified possible connection between wiggles and eruption intervals.
Obscured measurement of a steady orbital-period change.
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)
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