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The Perils of Pdot

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arxiv 2406.03948 v1 pith:7R3AG4PS submitted 2024-06-06 astro-ph.HE

Andrew King , Jean-Pierre Lasota This is my paper · ORCID
classification astro-ph.HE
keywords binaryevolutionaryalmostbecausecasecataclysmicconcludedconflict
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abstract

Schaefer (2024) has recently published observations of binary period derivatives $\dot P$ for 52 cataclysmic variables, and concluded that these strongly conflict with all proposed evolutionary pictures for these systems. We point out once again that using measurements of $\dot P$ is likely in practice to produce misleading evolutionary constraints in almost every case. The one identified exception to this is probably the recently-born X-ray binary SN 2022jli, because of its extremely high mass transfer rate.

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Cited by 1 Pith paper

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  1. The orbital period changes for novae

    astro-ph.SR 2025-07 conditional novelty 6.0 of 10

    Binary-driven mass loss during nova eruptions can explain nearly all observed orbital period changes of normal cataclysmic variables, while fast winds alone cannot.

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