{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2026:GKB2N2V3CWFIBO7AVYZURWDYWI","short_pith_number":"pith:GKB2N2V3","schema_version":"1.0","canonical_sha256":"3283a6eabb158a80bbe0ae3348d878b22ac293bb6ba1c23991ad2a4ca66f3b7f","source":{"kind":"arxiv","id":"2605.10092","version":2},"attestation_state":"computed","paper":{"title":"Tracing the kinematic perturbations of the Milky Way spiral arms with APOGEE DR17 and Gaia DR3","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"A revised model including both sine and cosine radial-velocity terms reproduces Milky Way stellar streaming motions to within 2 percent, constraining spiral pitch angle to about 10 degrees.","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"Hao Tian, Iulia T. Simion, Shuting Fan, Xi-Can Tang, Zhijian Luo, Zhi Li, Zi-Qi Li","submitted_at":"2026-05-11T07:10:42Z","abstract_excerpt":"Aims. We constrain the dynamical perturbations of the spiral arms in the Milky Way disk, based on the non-axisymmetric streaming motions of RGB stars revealed by APOGEE and \\textit{Gaia}.\n  Methods. We develop a revised steady-state radial-velocity response model that incorporates both the \\(V_{R,\\sin}\\) and the dynamically important \\(V_{R,\\cos}\\) components for a two-armed logarithmic spiral potential. The model is validated using orbit integrations with \\texttt{AGAMA} and Bayesian parameter recovery with \\texttt{dynesty}, and is applied to the smoothed two-dimensional radial-velocity field "},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"2605.10092","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2026-05-11T07:10:42Z","cross_cats_sorted":[],"title_canon_sha256":"50bd27bd15cf663ef90b412a54fc0c665ef633c243da2fbd93ec7be64619bb25","abstract_canon_sha256":"b5ec5412d71c8cf3fb7e60d976a297bc8bd7fe7c5c704970e491a1940739a7af"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-06-19T16:12:54.820358Z","signature_b64":"RBFYiT+iA8XnVRMk7fejHGPzopp1/hokAxKKy5ygiXXNG6r6SGmroWnH5zIcvmMnbthEWHJavkhEsD3kyYFIAQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"3283a6eabb158a80bbe0ae3348d878b22ac293bb6ba1c23991ad2a4ca66f3b7f","last_reissued_at":"2026-06-19T16:12:54.819990Z","signature_status":"signed_v1","first_computed_at":"2026-06-19T16:12:54.819990Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Tracing the kinematic perturbations of the Milky Way spiral arms with APOGEE DR17 and Gaia DR3","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"A revised model including both sine and cosine radial-velocity terms reproduces Milky Way stellar streaming motions to within 2 percent, constraining spiral pitch angle to about 10 degrees.","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"Hao Tian, Iulia T. Simion, Shuting Fan, Xi-Can Tang, Zhijian Luo, Zhi Li, Zi-Qi Li","submitted_at":"2026-05-11T07:10:42Z","abstract_excerpt":"Aims. We constrain the dynamical perturbations of the spiral arms in the Milky Way disk, based on the non-axisymmetric streaming motions of RGB stars revealed by APOGEE and \\textit{Gaia}.\n  Methods. We develop a revised steady-state radial-velocity response model that incorporates both the \\(V_{R,\\sin}\\) and the dynamically important \\(V_{R,\\cos}\\) components for a two-armed logarithmic spiral potential. The model is validated using orbit integrations with \\texttt{AGAMA} and Bayesian parameter recovery with \\texttt{dynesty}, and is applied to the smoothed two-dimensional radial-velocity field "},"claims":{"count":4,"items":[{"kind":"strongest_claim","text":"The revised model reproduces the phase and amplitude of the mock radial-velocity field to the ~2% level, substantially improving upon earlier V_R,sin-only formulations. Applied to the observational data, it yields a robust pitch angle of p ≃ 10° and a local surface density contrast of ξ ≃ 5--18% at the solar radius. The observed kinematics constrain the spiral pattern speed to Ω_p ≈ 10--20 km s^{-1} kpc^{-1}.","source":"verdict.strongest_claim","status":"machine_extracted","claim_id":"C1","attestation":"unclaimed"},{"kind":"weakest_assumption","text":"The assumption that the observed velocity field is dominated by the steady-state response to a two-armed logarithmic spiral potential, with resonances properly accounted for and no major contributions from other non-axisymmetric perturbations or time-dependent effects.","source":"verdict.weakest_assumption","status":"machine_extracted","claim_id":"C2","attestation":"unclaimed"},{"kind":"one_line_summary","text":"A revised steady-state radial-velocity response model with both V_R,sin and V_R,cos terms constrains the Milky Way's two-armed spiral to a pitch angle of ~10° and local density contrast of 5-18% at the solar radius.","source":"verdict.one_line_summary","status":"machine_extracted","claim_id":"C3","attestation":"unclaimed"},{"kind":"headline","text":"A revised model including both sine and cosine radial-velocity terms reproduces Milky Way stellar streaming motions to within 2 percent, constraining spiral pitch angle to about 10 degrees.","source":"verdict.pith_extraction.headline","status":"machine_extracted","claim_id":"C4","attestation":"unclaimed"}],"snapshot_sha256":"6fb1c09d01816f617c003d2c99d974e13cb2874dd5f51fc8b22f68e2325d8da2"},"source":{"id":"2605.10092","kind":"arxiv","version":2},"verdict":{"id":"e8523356-3310-4594-880b-da4414381274","model_set":{"reader":"grok-4.3"},"created_at":"2026-05-12T02:50:28.490734Z","strongest_claim":"The revised model reproduces the phase and amplitude of the mock radial-velocity field to the ~2% level, substantially improving upon earlier V_R,sin-only formulations. Applied to the observational data, it yields a robust pitch angle of p ≃ 10° and a local surface density contrast of ξ ≃ 5--18% at the solar radius. The observed kinematics constrain the spiral pattern speed to Ω_p ≈ 10--20 km s^{-1} kpc^{-1}.","one_line_summary":"A revised steady-state radial-velocity response model with both V_R,sin and V_R,cos terms constrains the Milky Way's two-armed spiral to a pitch angle of ~10° and local density contrast of 5-18% at the solar radius.","pipeline_version":"pith-pipeline@v0.9.0","weakest_assumption":"The assumption that the observed velocity field is dominated by the steady-state response to a two-armed logarithmic spiral potential, with resonances properly accounted for and no major contributions from other non-axisymmetric perturbations or time-dependent effects.","pith_extraction_headline":"A revised model including both sine and cosine radial-velocity terms reproduces Milky Way stellar streaming motions to within 2 percent, constraining spiral pitch angle to about 10 degrees."},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2605.10092/integrity.json","findings":[],"available":true,"detectors_run":[{"name":"claim_evidence","ran_at":"2026-05-20T06:42:01.049305Z","status":"completed","version":"1.0.0","findings_count":0},{"name":"ai_meta_artifact","ran_at":"2026-05-19T15:41:05.788028Z","status":"completed","version":"1.0.0","findings_count":0},{"name":"doi_title_agreement","ran_at":"2026-05-19T12:01:17.826932Z","status":"completed","version":"1.0.0","findings_count":0},{"name":"doi_compliance","ran_at":"2026-05-19T09:41:36.448230Z","status":"completed","version":"1.0.0","findings_count":0}],"snapshot_sha256":"37077c0f2d4017d882c302b9c0cbcc6c52fb1294a5348a6caf945a0903d152e7"},"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"},"aliases":[{"alias_kind":"arxiv","alias_value":"2605.10092","created_at":"2026-06-19T16:12:54.820053+00:00"},{"alias_kind":"arxiv_version","alias_value":"2605.10092v2","created_at":"2026-06-19T16:12:54.820053+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2605.10092","created_at":"2026-06-19T16:12:54.820053+00:00"},{"alias_kind":"pith_short_12","alias_value":"GKB2N2V3CWFI","created_at":"2026-06-19T16:12:54.820053+00:00"},{"alias_kind":"pith_short_16","alias_value":"GKB2N2V3CWFIBO7A","created_at":"2026-06-19T16:12:54.820053+00:00"},{"alias_kind":"pith_short_8","alias_value":"GKB2N2V3","created_at":"2026-06-19T16:12:54.820053+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":0,"internal_anchor_count":0,"sample":[]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/GKB2N2V3CWFIBO7AVYZURWDYWI","json":"https://pith.science/pith/GKB2N2V3CWFIBO7AVYZURWDYWI.json","graph_json":"https://pith.science/api/pith-number/GKB2N2V3CWFIBO7AVYZURWDYWI/graph.json","events_json":"https://pith.science/api/pith-number/GKB2N2V3CWFIBO7AVYZURWDYWI/events.json","paper":"https://pith.science/paper/GKB2N2V3"},"agent_actions":{"view_html":"https://pith.science/pith/GKB2N2V3CWFIBO7AVYZURWDYWI","download_json":"https://pith.science/pith/GKB2N2V3CWFIBO7AVYZURWDYWI.json","view_paper":"https://pith.science/paper/GKB2N2V3","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=2605.10092&json=true","fetch_graph":"https://pith.science/api/pith-number/GKB2N2V3CWFIBO7AVYZURWDYWI/graph.json","fetch_events":"https://pith.science/api/pith-number/GKB2N2V3CWFIBO7AVYZURWDYWI/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/GKB2N2V3CWFIBO7AVYZURWDYWI/action/timestamp_anchor","attest_storage":"https://pith.science/pith/GKB2N2V3CWFIBO7AVYZURWDYWI/action/storage_attestation","attest_author":"https://pith.science/pith/GKB2N2V3CWFIBO7AVYZURWDYWI/action/author_attestation","sign_citation":"https://pith.science/pith/GKB2N2V3CWFIBO7AVYZURWDYWI/action/citation_signature","submit_replication":"https://pith.science/pith/GKB2N2V3CWFIBO7AVYZURWDYWI/action/replication_record"}},"created_at":"2026-06-19T16:12:54.820053+00:00","updated_at":"2026-06-19T16:12:54.820053+00:00"}