{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2011:KE2TK5YXWK2GPK6QNPJITP3H3A","short_pith_number":"pith:KE2TK5YX","schema_version":"1.0","canonical_sha256":"5135357717b2b467abd06bd289bf67d82106dccf1563400166d639bdc8fc3b60","source":{"kind":"arxiv","id":"1108.0663","version":2},"attestation_state":"computed","paper":{"title":"The angular momentum of disc galaxies: implications for gas accretion, outflows, and dynamical friction","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.GA"],"primary_cat":"astro-ph.CO","authors_text":"Aaron A. Dutton (Victoria), Frank C. van den Bosch (Yale)","submitted_at":"2011-08-02T20:00:01Z","abstract_excerpt":"We combine constraints on the galaxy-dark matter connection with structural and dynamical scaling relations to investigate the angular momentum content of disc galaxies. For haloes with masses in the interval 10^{11.3} < M_vir/M_sun < 10^{12.7} we find that the galaxy spin parameters are independent of halo mass with <\\lambda'_gal> = (J_gal/M_gal) / (\\sqrt{2} R_vir V_vir) = 0.019^{+0.004}_{-0.003} (1sigma). This is significantly lower than for relaxed LCDM haloes, which have an average spin parameter <\\lambda'_halo> = 0.031. The average ratio between the specific angular momentum of disk galax"},"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":"1108.0663","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2011-08-02T20:00:01Z","cross_cats_sorted":["astro-ph.GA"],"title_canon_sha256":"378f0f58f9d815e2a04cba3cbef9bead7c4d0fb5a313b558193262b78776c8c8","abstract_canon_sha256":"163d300827a0eb5e065a0fc6a37f74eec53504041bab7e9f6f5cfbde2c699f56"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:01:04.053150Z","signature_b64":"V9QNgoUvvr96GQUUH94tqJ4XN8OkjnpchGivKadkkzgLGk8HHffeYigiOOiG6LHcAMJHmYwNpRWy14VWAWZcCw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"5135357717b2b467abd06bd289bf67d82106dccf1563400166d639bdc8fc3b60","last_reissued_at":"2026-05-18T02:01:04.052370Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:01:04.052370Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"The angular momentum of disc galaxies: implications for gas accretion, outflows, and dynamical friction","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.GA"],"primary_cat":"astro-ph.CO","authors_text":"Aaron A. Dutton (Victoria), Frank C. van den Bosch (Yale)","submitted_at":"2011-08-02T20:00:01Z","abstract_excerpt":"We combine constraints on the galaxy-dark matter connection with structural and dynamical scaling relations to investigate the angular momentum content of disc galaxies. For haloes with masses in the interval 10^{11.3} < M_vir/M_sun < 10^{12.7} we find that the galaxy spin parameters are independent of halo mass with <\\lambda'_gal> = (J_gal/M_gal) / (\\sqrt{2} R_vir V_vir) = 0.019^{+0.004}_{-0.003} (1sigma). This is significantly lower than for relaxed LCDM haloes, which have an average spin parameter <\\lambda'_halo> = 0.031. The average ratio between the specific angular momentum of disk galax"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1108.0663","kind":"arxiv","version":2},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"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":"1108.0663","created_at":"2026-05-18T02:01:04.052488+00:00"},{"alias_kind":"arxiv_version","alias_value":"1108.0663v2","created_at":"2026-05-18T02:01:04.052488+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1108.0663","created_at":"2026-05-18T02:01:04.052488+00:00"},{"alias_kind":"pith_short_12","alias_value":"KE2TK5YXWK2G","created_at":"2026-05-18T12:26:32.869790+00:00"},{"alias_kind":"pith_short_16","alias_value":"KE2TK5YXWK2GPK6Q","created_at":"2026-05-18T12:26:32.869790+00:00"},{"alias_kind":"pith_short_8","alias_value":"KE2TK5YX","created_at":"2026-05-18T12:26:32.869790+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/KE2TK5YXWK2GPK6QNPJITP3H3A","json":"https://pith.science/pith/KE2TK5YXWK2GPK6QNPJITP3H3A.json","graph_json":"https://pith.science/api/pith-number/KE2TK5YXWK2GPK6QNPJITP3H3A/graph.json","events_json":"https://pith.science/api/pith-number/KE2TK5YXWK2GPK6QNPJITP3H3A/events.json","paper":"https://pith.science/paper/KE2TK5YX"},"agent_actions":{"view_html":"https://pith.science/pith/KE2TK5YXWK2GPK6QNPJITP3H3A","download_json":"https://pith.science/pith/KE2TK5YXWK2GPK6QNPJITP3H3A.json","view_paper":"https://pith.science/paper/KE2TK5YX","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1108.0663&json=true","fetch_graph":"https://pith.science/api/pith-number/KE2TK5YXWK2GPK6QNPJITP3H3A/graph.json","fetch_events":"https://pith.science/api/pith-number/KE2TK5YXWK2GPK6QNPJITP3H3A/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/KE2TK5YXWK2GPK6QNPJITP3H3A/action/timestamp_anchor","attest_storage":"https://pith.science/pith/KE2TK5YXWK2GPK6QNPJITP3H3A/action/storage_attestation","attest_author":"https://pith.science/pith/KE2TK5YXWK2GPK6QNPJITP3H3A/action/author_attestation","sign_citation":"https://pith.science/pith/KE2TK5YXWK2GPK6QNPJITP3H3A/action/citation_signature","submit_replication":"https://pith.science/pith/KE2TK5YXWK2GPK6QNPJITP3H3A/action/replication_record"}},"created_at":"2026-05-18T02:01:04.052488+00:00","updated_at":"2026-05-18T02:01:04.052488+00:00"}