{"paper":{"title":"A Falsifiable Timing Test for the Double-White-Dwarf Model of Long-Period Transients","license":"http://creativecommons.org/licenses/by/4.0/","headline":"The double-white-dwarf model for long-period transients predicts a joint drift in burst and modulation periods that reaches tens of seconds within one year.","cross_cats":[],"primary_cat":"astro-ph.HE","authors_text":"Di Wang, Fa-Yin Wang, Yejing Zhan","submitted_at":"2026-04-13T11:19:37Z","abstract_excerpt":"Long-period transients (LPTs) are a newly identified class of radio sources with burst recurrence times from minutes to hours, and their diversity suggests multiple physical origins. CHIME/ILT J1634+44, with a short period of 841 s, a long-period modulation of 4206 s, and a significant negative period derivative, strongly suggests a binary origin. For such a short-period source, Roche-lobe constraints strongly favor an ultra-compact companion, motivating a double-white-dwarf (WD--WD) interpretation. In this Letter, we show that the WD--WD channel makes a sharp timing prediction: if the burst p"},"claims":{"count":4,"items":[{"kind":"strongest_claim","text":"if the burst period is the orbital clock and the long-period modulation is a spin-orbit beat, then the modulation period is not a free timescale. Instead it must evolve jointly with the orbital clock and the spin clock through gravitational-wave losses, magnetic dissipation, and tidal interaction. For CHIME/ILT J1634+44-like parameters, we find that the beat clock drift |P_b dot|∼10^{-10} s s^{-1}, implying an observed-minus-calculated drift of tens of seconds in one year.","source":"verdict.strongest_claim","status":"machine_extracted","claim_id":"C1","attestation":"unclaimed"},{"kind":"weakest_assumption","text":"The assumption that the observed 841 s and 4206 s periods correspond exactly to the orbital period and spin-orbit beat in an ultra-compact double-white-dwarf system, with evolution dominated by gravitational-wave losses, magnetic dissipation, and tidal interaction and no other dominant effects.","source":"verdict.weakest_assumption","status":"machine_extracted","claim_id":"C2","attestation":"unclaimed"},{"kind":"one_line_summary","text":"The double-white-dwarf model for sources like CHIME/ILT J1634+44 predicts a beat-period drift of |P_b dot| ~ 10^{-10} s s^{-1}, producing tens of seconds of O-C timing drift in one year and enabling a minimal falsifiable test via joint period and derivative measurements.","source":"verdict.one_line_summary","status":"machine_extracted","claim_id":"C3","attestation":"unclaimed"},{"kind":"headline","text":"The double-white-dwarf model for long-period transients predicts a joint drift in burst and modulation periods that reaches tens of seconds within one year.","source":"verdict.pith_extraction.headline","status":"machine_extracted","claim_id":"C4","attestation":"unclaimed"}],"snapshot_sha256":"6cc1c39f9c9f7455ff2e857d59e0b7b10415a73ec7ba3c76738693f4e43569e2"},"source":{"id":"2604.11317","kind":"arxiv","version":2},"verdict":{"id":"abd19a5c-eab9-4608-8507-68ac5e9de713","model_set":{"reader":"grok-4.3"},"created_at":"2026-05-10T15:13:37.834515Z","strongest_claim":"if the burst period is the orbital clock and the long-period modulation is a spin-orbit beat, then the modulation period is not a free timescale. Instead it must evolve jointly with the orbital clock and the spin clock through gravitational-wave losses, magnetic dissipation, and tidal interaction. For CHIME/ILT J1634+44-like parameters, we find that the beat clock drift |P_b dot|∼10^{-10} s s^{-1}, implying an observed-minus-calculated drift of tens of seconds in one year.","one_line_summary":"The double-white-dwarf model for sources like CHIME/ILT J1634+44 predicts a beat-period drift of |P_b dot| ~ 10^{-10} s s^{-1}, producing tens of seconds of O-C timing drift in one year and enabling a minimal falsifiable test via joint period and derivative measurements.","pipeline_version":"pith-pipeline@v0.9.0","weakest_assumption":"The assumption that the observed 841 s and 4206 s periods correspond exactly to the orbital period and spin-orbit beat in an ultra-compact double-white-dwarf system, with evolution dominated by gravitational-wave losses, magnetic dissipation, and tidal interaction and no other dominant effects.","pith_extraction_headline":"The double-white-dwarf model for long-period transients predicts a joint drift in burst and modulation periods that reaches tens of seconds within one year."},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2604.11317/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"}