{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:Y3QPPF7PONURGE7MDVRA6ALKAA","merge_version":"pith-open-graph-merge-v1","event_count":2,"valid_event_count":2,"invalid_event_count":0,"equivocation_count":0,"current":{"canonical_record":{"metadata":{"abstract_canon_sha256":"d185482220b9dd38ff67a6ba92c75ce59f5566ebe7c45bcf0e2e2decda17bcc1","cross_cats_sorted":["astro-ph.CO","hep-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2019-05-30T18:00:02Z","title_canon_sha256":"7fdb685324573276cd80e40bae8bd5519974cb2844baf710bf4cb5b83fa5ba27"},"schema_version":"1.0","source":{"id":"1905.13235","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1905.13235","created_at":"2026-05-17T23:41:08Z"},{"alias_kind":"arxiv_version","alias_value":"1905.13235v1","created_at":"2026-05-17T23:41:08Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1905.13235","created_at":"2026-05-17T23:41:08Z"},{"alias_kind":"pith_short_12","alias_value":"Y3QPPF7PONUR","created_at":"2026-05-18T12:33:33Z"},{"alias_kind":"pith_short_16","alias_value":"Y3QPPF7PONURGE7M","created_at":"2026-05-18T12:33:33Z"},{"alias_kind":"pith_short_8","alias_value":"Y3QPPF7P","created_at":"2026-05-18T12:33:33Z"}],"graph_snapshots":[{"event_id":"sha256:cb5e1a1f966646976eb4e3ac00a176a3febaa34c59be2669b64e01c9c82ad881","target":"graph","created_at":"2026-05-17T23:41:08Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"graph_snapshot":{"author_claims":{"count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","strong_count":0},"builder_version":"pith-number-builder-2026-05-17-v1","claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"paper":{"abstract_excerpt":"I develop a high velocity galaxy collision model to explain a rare but puzzling phenomenon, namely the apparent existence of ultra-diffuse galaxies with little dark matter. Predictions include simultaneous triggering of overpressured dense clouds to form luminous old globular clusters, a protogroup environment to generate high relative velocities of the initially gas-rich galaxies in the early universe, and spatially separated dark halos, possibly detectable via gravitational lensing and containing relic low metallicity stars with enhanced [alpha/Fe] at ultralow surface brightness.","authors_text":"Joseph Silk","cross_cats":["astro-ph.CO","hep-ph"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2019-05-30T18:00:02Z","title":"Ultra-diffuse galaxies without dark matter"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1905.13235","kind":"arxiv","version":1},"verdict":{"created_at":null,"id":null,"model_set":{},"one_line_summary":"","pipeline_version":null,"pith_extraction_headline":"","strongest_claim":"","weakest_assumption":""}},"verdict_id":null}}],"author_attestations":[],"timestamp_anchors":[],"storage_attestations":[],"citation_signatures":[],"replication_records":[],"corrections":[],"mirror_hints":[],"record_created":{"event_id":"sha256:97aef367f4f8551f58aeb5d858b9930037ef8b461c08eec15d0163a37eddb5da","target":"record","created_at":"2026-05-17T23:41:08Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"attestation_state":"computed","canonical_record":{"metadata":{"abstract_canon_sha256":"d185482220b9dd38ff67a6ba92c75ce59f5566ebe7c45bcf0e2e2decda17bcc1","cross_cats_sorted":["astro-ph.CO","hep-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2019-05-30T18:00:02Z","title_canon_sha256":"7fdb685324573276cd80e40bae8bd5519974cb2844baf710bf4cb5b83fa5ba27"},"schema_version":"1.0","source":{"id":"1905.13235","kind":"arxiv","version":1}},"canonical_sha256":"c6e0f797ef73691313ec1d620f016a003c52432477b5d2f0e1f7d0d347c98ef6","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"c6e0f797ef73691313ec1d620f016a003c52432477b5d2f0e1f7d0d347c98ef6","first_computed_at":"2026-05-17T23:41:08.113946Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:41:08.113946Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"q8vqDaTIRP9hpGLU9Bun+d93D5LKTEU4sEKIjBZgjfGe3XAzbQfMVzxmR5mcuIHKuxqZ8Ee6pOP9emXITyBtAQ==","signature_status":"signed_v1","signed_at":"2026-05-17T23:41:08.114653Z","signed_message":"canonical_sha256_bytes"},"source_id":"1905.13235","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:97aef367f4f8551f58aeb5d858b9930037ef8b461c08eec15d0163a37eddb5da","sha256:cb5e1a1f966646976eb4e3ac00a176a3febaa34c59be2669b64e01c9c82ad881"],"state_sha256":"739141454c43fdcfa2d6f281daf0e64fa62107068e37b8e78f3e37f23348e753"}