{"schema":"pubphys.bundle/1","record":{"author":{"account_ref":null,"orcid":null},"builds_on":[],"content_schema":"pubphys.content.revision/1","content_sha256":"a6c1098b346d107539d0d8c33f8e3a550c5f7d0e27dc84a172e9e5e60e2470f3","created":"2026-10-03T07:17:55Z","files":[],"origin":{"assisted_by":[],"kind":"seed"},"parents":["5475cf5dc5b1a72283d26dc95dc6e00d7ea4e00096a7c6492e409a1816eeb011"],"salt":"1cc03a04ab9d4b9a498324af430c42a8aa5f2232126168d883893cc976aba60f","schema":"pubphys.record/2","site":"pubphys.com","target":null,"type":"revision"},"content":{"answer_type":"value","assisted_by":[],"external_id":"astro.hot-jupiters.tidal-q","kind":"well-posed","literature_status":"open","n":"1","parents":[],"plain":"Tides raised by a close giant planet on its star slowly drag the planet inward. How strongly stars dissipate tidal energy decides how long hot Jupiters survive.","posed_since":"","precise":"Determine the modified tidal quality factor $Q'_{*}$ of solar-type stars at tidal periods $\\sim 1\\,\\mathrm{d}$ and its dependence on stellar structure. WASP-12 b shows orbital decay with $dP/dt$ of approximately $-29\\,\\mathrm{ms}/\\mathrm{yr}$, giving $Q'_{*}$ of approximately $2x10^{5}$, while other systems imply $Q'_{*} > 10^{7}$. The answer is $Q'_{*}$ as a function of stellar mass, age and tidal frequency.","problem_ref":null,"references":"","settled_by":"Transit-timing measurements of orbital decay in many hot Jupiter systems over decades, combined with asteroseismic stellar structure.","status_note":"Orbital decay of WASP-12 b was established by 2020; whether its rapid decay reflects an evolved host star remains open.","title":"What is the tidal dissipation factor of Sun-like 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