{"paper":{"title":"The Neptunian ridge as a natural outcome of high-eccentricity tidal migration","license":"http://creativecommons.org/licenses/by/4.0/","headline":"High-eccentricity tidal migration explains the Neptunian ridge as a natural clustering of survivors beyond the tidal disruption limit.","cross_cats":[],"primary_cat":"astro-ph.EP","authors_text":"A. Castro-Gonz\\'alez, A. C. M. Correia, D. Ehrenreich, D. J. Armstrong, M. Lendl, V. Bourrier","submitted_at":"2026-04-17T17:59:53Z","abstract_excerpt":"Recent occurrence-rate analyses have shown that the transition between the Neptunian desert and the savanna is not smooth but instead exhibits an overdensity of planets at $P_{\\rm orb}\\simeq3$-$6$ d, known as the Neptunian ridge. We confronted the high-eccentricity tidal migration (HEM) scenario with this updated desert-ridge-savanna landscape. We mapped the HEM tidal survival constraints onto the period-radius plane using empirically inferred mass-radius relations and provided an independent consistency check in the period-density plane. The HEM tidal survival formalism reproduces the slope o"},"claims":{"count":4,"items":[{"kind":"strongest_claim","text":"High-eccentricity tidal migration thus provides a self-consistent explanation for the ridge and desert boundary geometry.","source":"verdict.strongest_claim","status":"machine_extracted","claim_id":"C1","attestation":"unclaimed"},{"kind":"weakest_assumption","text":"That a single representative tidal encounter parameter can be chosen to set the overall period offset across the sub-Neptune to super-Neptune regime while the slope is independently reproduced by the survival formalism.","source":"verdict.weakest_assumption","status":"machine_extracted","claim_id":"C2","attestation":"unclaimed"},{"kind":"one_line_summary","text":"High-eccentricity tidal migration reproduces the Neptunian desert boundary slope and produces the ridge overdensity through density-dependent survival and clustering just beyond the disruption limit.","source":"verdict.one_line_summary","status":"machine_extracted","claim_id":"C3","attestation":"unclaimed"},{"kind":"headline","text":"High-eccentricity tidal migration explains the Neptunian ridge as a natural clustering of survivors beyond the tidal disruption limit.","source":"verdict.pith_extraction.headline","status":"machine_extracted","claim_id":"C4","attestation":"unclaimed"}],"snapshot_sha256":"9cb4e7da5c29e0f4a26ef618cea3837492f8f88e8e64758964fcbaae118e367f"},"source":{"id":"2604.16300","kind":"arxiv","version":3},"verdict":{"id":"d68aa377-4384-45d1-a75e-4e7ae2d2e121","model_set":{"reader":"grok-4.3"},"created_at":"2026-05-10T06:53:19.033707Z","strongest_claim":"High-eccentricity tidal migration thus provides a self-consistent explanation for the ridge and desert boundary geometry.","one_line_summary":"High-eccentricity tidal migration reproduces the Neptunian desert boundary slope and produces the ridge overdensity through density-dependent survival and clustering just beyond the disruption limit.","pipeline_version":"pith-pipeline@v0.9.0","weakest_assumption":"That a single representative tidal encounter parameter can be chosen to set the overall period offset across the sub-Neptune to super-Neptune regime while the slope is independently reproduced by the survival formalism.","pith_extraction_headline":"High-eccentricity tidal migration explains the Neptunian ridge as a natural clustering of survivors beyond the tidal disruption limit."},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2604.16300/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"references":{"count":37,"sample":[{"doi":"","year":2016,"title":"R., Storch , N","work_id":"","ref_index":1,"cited_arxiv_id":"","is_internal_anchor":false},{"doi":"","year":2021,"title":"2021, , 647, A40","work_id":"","ref_index":2,"cited_arxiv_id":"","is_internal_anchor":false},{"doi":"","year":2023,"title":"2023, , 669, A63","work_id":"","ref_index":3,"cited_arxiv_id":"","is_internal_anchor":false},{"doi":"","year":2018,"title":"2018, , 553, 477","work_id":"","ref_index":4,"cited_arxiv_id":"","is_internal_anchor":false},{"doi":"","year":2025,"title":"2025, , 701, A190","work_id":"","ref_index":5,"cited_arxiv_id":"","is_internal_anchor":false}],"resolved_work":0,"snapshot_sha256":"85d7a5c389465aa2936cdf5a1c1fe329cea84bf5e43dacafe21e706545203feb","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"}