{"paper":{"title":"GRRMHD Simulations of State Transitions in Non-Jetted Tidal Disruption Events","license":"http://creativecommons.org/licenses/by/4.0/","headline":"GRRMHD simulations show TDE disks become thermally unstable in 17-46 days, causing X-ray luminosity to drop by nearly 100 times.","cross_cats":[],"primary_cat":"astro-ph.HE","authors_text":"Aviyel Ahiyya, Brandon Curd, Richard Anantua, Safira Heridia","submitted_at":"2026-04-27T00:10:19Z","abstract_excerpt":"Circularization of the stream material into a debris cloud during tidal disruption events (TDEs) was recently demonstrated in one of the most accurate long duration TDE simulations to-date. The cooling envelope model (CEM) provides a description of the circularized debris cloud and its emission over time well beyond circularization across different disruption parameters. In the CEM, sub-Eddington accretion rates occur early in TDEs and the debris has a shallow density profile of roughly $\\rho \\propto r^{-1}$, with Eddington accretion only being achieved after several months. To explore the lat"},"claims":{"count":4,"items":[{"kind":"strongest_claim","text":"We find that the disk becomes thermally unstable within 17.1-46.5 days depending on the spin of the BH. Thermal spectra show a soft X-ray excess prior to collapse, with a nearly two order of magnitude decline in X-ray luminosity upon disk collapse. The spectral properties and soft X-ray luminosity in our models are similar to the TDE AT2021ehb.","source":"verdict.strongest_claim","status":"machine_extracted","claim_id":"C1","attestation":"unclaimed"},{"kind":"weakest_assumption","text":"The initial magnetized torus accurately represents the late-stage debris from the cooling envelope model without requiring full self-consistent evolution from the initial stellar disruption; the simulations also assume standard ideal MHD and radiative cooling prescriptions whose validity at these densities is not re-derived here.","source":"verdict.weakest_assumption","status":"machine_extracted","claim_id":"C2","attestation":"unclaimed"},{"kind":"one_line_summary","text":"GRRMHD simulations of TDE debris disks reveal thermal instability and collapse within weeks, producing soft X-ray excess followed by a sharp luminosity drop that resembles AT2021ehb observations.","source":"verdict.one_line_summary","status":"machine_extracted","claim_id":"C3","attestation":"unclaimed"},{"kind":"headline","text":"GRRMHD simulations show TDE disks become thermally unstable in 17-46 days, causing X-ray luminosity to drop by nearly 100 times.","source":"verdict.pith_extraction.headline","status":"machine_extracted","claim_id":"C4","attestation":"unclaimed"}],"snapshot_sha256":"2c21c62f0bbd8e7a6aae4e898657cf34540a5dd2306371db6cc5f7ed6d7e27fd"},"source":{"id":"2604.23916","kind":"arxiv","version":2},"verdict":{"id":"3f98b8af-1bd7-421e-a667-9b16a86fcace","model_set":{"reader":"grok-4.3"},"created_at":"2026-05-08T02:19:05.423911Z","strongest_claim":"We find that the disk becomes thermally unstable within 17.1-46.5 days depending on the spin of the BH. Thermal spectra show a soft X-ray excess prior to collapse, with a nearly two order of magnitude decline in X-ray luminosity upon disk collapse. The spectral properties and soft X-ray luminosity in our models are similar to the TDE AT2021ehb.","one_line_summary":"GRRMHD simulations of TDE debris disks reveal thermal instability and collapse within weeks, producing soft X-ray excess followed by a sharp luminosity drop that resembles AT2021ehb observations.","pipeline_version":"pith-pipeline@v0.9.0","weakest_assumption":"The initial magnetized torus accurately represents the late-stage debris from the cooling envelope model without requiring full self-consistent evolution from the initial stellar disruption; the simulations also assume standard ideal MHD and radiative cooling prescriptions whose validity at these densities is not re-derived here.","pith_extraction_headline":"GRRMHD simulations show TDE disks become thermally unstable in 17-46 days, causing X-ray luminosity to drop by nearly 100 times."},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2604.23916/integrity.json","findings":[],"available":true,"detectors_run":[{"name":"ai_meta_artifact","ran_at":"2026-05-21T07:42:07.591340Z","status":"completed","version":"1.0.0","findings_count":0},{"name":"doi_compliance","ran_at":"2026-05-19T22:36:19.147955Z","status":"completed","version":"1.0.0","findings_count":0}],"snapshot_sha256":"38aae3b5292ca4e6692943104fc92f17668ac9e9c20aeaf635ab8e8a3497668f"},"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"}