Abstract
The variable star PG1159–035, discovered by McGraw et al.1, is the prototype of a new class of extremely hot pulsating degenerate stars. Here we present preliminary theoretical results indicating that the pulsation periods of these stars should be decreasing with an e-folding time of the order of 106 yr—a value directly reflecting their rapid cooling times. We point out that such a rapid change in period should be measurable on a time scale of 1–3 yr, and that such measurements should be a direct test of stellar evolution and pulsation theory for hot degenerate objects.
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References
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Winget, D., Hansen, C. & Van Horn, H. Do pulsating PG1159–035 stars put constraints on stellar evolution?. Nature 303, 781–782 (1983). https://doi.org/10.1038/303781a0
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DOI: https://doi.org/10.1038/303781a0
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