{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2024:ZS42T2W3A3B4SQN5DCLEOQCKA2","short_pith_number":"pith:ZS42T2W3","schema_version":"1.0","canonical_sha256":"ccb9a9eadb06c3c941bd189647404a06985099b68729f4ad71e5771a04330264","source":{"kind":"arxiv","id":"2412.02737","version":5},"attestation_state":"computed","paper":{"title":"Dark matter fraction derived from the M31 rotation curve","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["gr-qc"],"primary_cat":"astro-ph.GA","authors_text":"F. Hammer, G. A. Mamon, H. F. Wang, I. Akib, J. L. Wang, L. Chemin, P. Amram, Y. B. Yang, Y. J. Jiao","submitted_at":"2024-12-03T19:00:00Z","abstract_excerpt":"Mass estimates of a spiral galaxy derived from its rotation curve must account for the galaxy's past accretion history. There are several lines of evidence indicating that M31 experienced a major merger 2 to 3 Gyr ago. Here, we have generated a dynamical model of M31 as a merger remnant that reproduces most of its properties, from the central bar to the outskirts. The model accounts for the past major merger, and reproduces the details of M31's rotation curve, including its 14 kpc bump and the observed increase of velocity beyond 25 kpc. Furthermore, we find non-equilibrium and oscillatory mot"},"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":"2412.02737","kind":"arxiv","version":5},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2024-12-03T19:00:00Z","cross_cats_sorted":["gr-qc"],"title_canon_sha256":"ead4f932897e95d28d720a7889c5622d31b4ecb959472411ade68111f3ad95a3","abstract_canon_sha256":"63b9e0cc8ac1b87787bac9bc921d72f8743a56668634a8a1f6fe96da0b4d505a"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T10:11:29.572249Z","signature_b64":"powKpr5tCeyUOl7dOPH7g8ZTrIT4OKzrfpzzhcpGHhLf9DgUKH4NxgQtKs3FUttLaPVVQ+vK22SeF4or3kDGDA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"ccb9a9eadb06c3c941bd189647404a06985099b68729f4ad71e5771a04330264","last_reissued_at":"2026-07-05T10:11:29.571763Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T10:11:29.571763Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Dark matter fraction derived from the M31 rotation curve","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["gr-qc"],"primary_cat":"astro-ph.GA","authors_text":"F. Hammer, G. A. Mamon, H. F. Wang, I. Akib, J. L. Wang, L. Chemin, P. Amram, Y. B. Yang, Y. J. Jiao","submitted_at":"2024-12-03T19:00:00Z","abstract_excerpt":"Mass estimates of a spiral galaxy derived from its rotation curve must account for the galaxy's past accretion history. There are several lines of evidence indicating that M31 experienced a major merger 2 to 3 Gyr ago. Here, we have generated a dynamical model of M31 as a merger remnant that reproduces most of its properties, from the central bar to the outskirts. The model accounts for the past major merger, and reproduces the details of M31's rotation curve, including its 14 kpc bump and the observed increase of velocity beyond 25 kpc. Furthermore, we find non-equilibrium and oscillatory mot"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2412.02737","kind":"arxiv","version":5},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2412.02737/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"},"aliases":[{"alias_kind":"arxiv","alias_value":"2412.02737","created_at":"2026-07-05T10:11:29.571822+00:00"},{"alias_kind":"arxiv_version","alias_value":"2412.02737v5","created_at":"2026-07-05T10:11:29.571822+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2412.02737","created_at":"2026-07-05T10:11:29.571822+00:00"},{"alias_kind":"pith_short_12","alias_value":"ZS42T2W3A3B4","created_at":"2026-07-05T10:11:29.571822+00:00"},{"alias_kind":"pith_short_16","alias_value":"ZS42T2W3A3B4SQN5","created_at":"2026-07-05T10:11:29.571822+00:00"},{"alias_kind":"pith_short_8","alias_value":"ZS42T2W3","created_at":"2026-07-05T10:11:29.571822+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/ZS42T2W3A3B4SQN5DCLEOQCKA2","json":"https://pith.science/pith/ZS42T2W3A3B4SQN5DCLEOQCKA2.json","graph_json":"https://pith.science/api/pith-number/ZS42T2W3A3B4SQN5DCLEOQCKA2/graph.json","events_json":"https://pith.science/api/pith-number/ZS42T2W3A3B4SQN5DCLEOQCKA2/events.json","paper":"https://pith.science/paper/ZS42T2W3"},"agent_actions":{"view_html":"https://pith.science/pith/ZS42T2W3A3B4SQN5DCLEOQCKA2","download_json":"https://pith.science/pith/ZS42T2W3A3B4SQN5DCLEOQCKA2.json","view_paper":"https://pith.science/paper/ZS42T2W3","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=2412.02737&json=true","fetch_graph":"https://pith.science/api/pith-number/ZS42T2W3A3B4SQN5DCLEOQCKA2/graph.json","fetch_events":"https://pith.science/api/pith-number/ZS42T2W3A3B4SQN5DCLEOQCKA2/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/ZS42T2W3A3B4SQN5DCLEOQCKA2/action/timestamp_anchor","attest_storage":"https://pith.science/pith/ZS42T2W3A3B4SQN5DCLEOQCKA2/action/storage_attestation","attest_author":"https://pith.science/pith/ZS42T2W3A3B4SQN5DCLEOQCKA2/action/author_attestation","sign_citation":"https://pith.science/pith/ZS42T2W3A3B4SQN5DCLEOQCKA2/action/citation_signature","submit_replication":"https://pith.science/pith/ZS42T2W3A3B4SQN5DCLEOQCKA2/action/replication_record"}},"created_at":"2026-07-05T10:11:29.571822+00:00","updated_at":"2026-07-05T10:11:29.571822+00:00"}