{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2008:GEXOEG3NRWBA3KGSCPJNB5RD3I","short_pith_number":"pith:GEXOEG3N","schema_version":"1.0","canonical_sha256":"312ee21b6d8d820da8d213d2d0f623da229ac95cca151981880b343c3a07976d","source":{"kind":"arxiv","id":"0809.0513","version":1},"attestation_state":"computed","paper":{"title":"Formation and evolution of disk galaxies","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"Joseph Silk","submitted_at":"2008-09-02T20:12:46Z","abstract_excerpt":"Global star formation is the key to understanding galaxy disk formation. This in turn depends on gravitational instability of disks and continuing gas accretion as well as minor merging. A key component is feedback from supernovae. Primary observational constraints on disk galaxy formation and evolution include the Schmidt-Kennicutt law, the Tully-Fisher relation and the galaxy luminosity function. I will review how theory confronts phenomenology, and discuss future prospects for refining our understanding of disk formation."},"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":"0809.0513","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph","submitted_at":"2008-09-02T20:12:46Z","cross_cats_sorted":[],"title_canon_sha256":"d7ea20e58a2b628f75030e49ac633ed5f7171525013be978c73c236259515dd5","abstract_canon_sha256":"a5d3f4660618e1a4ec220349d29d037ffe7145f3cb3454e40855056680a18ada"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:15:35.638031Z","signature_b64":"v4fQmbADqa4seeJEggxCGCx0LApgj0E8eibUkF37AwRVeI/5XVBrI6/DBIHMH4kiE3tCmXdFDX8/qPu/mZhpDg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"312ee21b6d8d820da8d213d2d0f623da229ac95cca151981880b343c3a07976d","last_reissued_at":"2026-05-18T02:15:35.637303Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:15:35.637303Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Formation and evolution of disk galaxies","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"Joseph Silk","submitted_at":"2008-09-02T20:12:46Z","abstract_excerpt":"Global star formation is the key to understanding galaxy disk formation. This in turn depends on gravitational instability of disks and continuing gas accretion as well as minor merging. A key component is feedback from supernovae. Primary observational constraints on disk galaxy formation and evolution include the Schmidt-Kennicutt law, the Tully-Fisher relation and the galaxy luminosity function. I will review how theory confronts phenomenology, and discuss future prospects for refining our understanding of disk formation."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0809.0513","kind":"arxiv","version":1},"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":"0809.0513","created_at":"2026-05-18T02:15:35.637421+00:00"},{"alias_kind":"arxiv_version","alias_value":"0809.0513v1","created_at":"2026-05-18T02:15:35.637421+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0809.0513","created_at":"2026-05-18T02:15:35.637421+00:00"},{"alias_kind":"pith_short_12","alias_value":"GEXOEG3NRWBA","created_at":"2026-05-18T12:25:57.157939+00:00"},{"alias_kind":"pith_short_16","alias_value":"GEXOEG3NRWBA3KGS","created_at":"2026-05-18T12:25:57.157939+00:00"},{"alias_kind":"pith_short_8","alias_value":"GEXOEG3N","created_at":"2026-05-18T12:25:57.157939+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/GEXOEG3NRWBA3KGSCPJNB5RD3I","json":"https://pith.science/pith/GEXOEG3NRWBA3KGSCPJNB5RD3I.json","graph_json":"https://pith.science/api/pith-number/GEXOEG3NRWBA3KGSCPJNB5RD3I/graph.json","events_json":"https://pith.science/api/pith-number/GEXOEG3NRWBA3KGSCPJNB5RD3I/events.json","paper":"https://pith.science/paper/GEXOEG3N"},"agent_actions":{"view_html":"https://pith.science/pith/GEXOEG3NRWBA3KGSCPJNB5RD3I","download_json":"https://pith.science/pith/GEXOEG3NRWBA3KGSCPJNB5RD3I.json","view_paper":"https://pith.science/paper/GEXOEG3N","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=0809.0513&json=true","fetch_graph":"https://pith.science/api/pith-number/GEXOEG3NRWBA3KGSCPJNB5RD3I/graph.json","fetch_events":"https://pith.science/api/pith-number/GEXOEG3NRWBA3KGSCPJNB5RD3I/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/GEXOEG3NRWBA3KGSCPJNB5RD3I/action/timestamp_anchor","attest_storage":"https://pith.science/pith/GEXOEG3NRWBA3KGSCPJNB5RD3I/action/storage_attestation","attest_author":"https://pith.science/pith/GEXOEG3NRWBA3KGSCPJNB5RD3I/action/author_attestation","sign_citation":"https://pith.science/pith/GEXOEG3NRWBA3KGSCPJNB5RD3I/action/citation_signature","submit_replication":"https://pith.science/pith/GEXOEG3NRWBA3KGSCPJNB5RD3I/action/replication_record"}},"created_at":"2026-05-18T02:15:35.637421+00:00","updated_at":"2026-05-18T02:15:35.637421+00:00"}