{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:I52DVGJLZQFCQ3FI2VNPMUQJXP","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":"a8b965d62168613cb4c1637ae22b15aefc56a6c4627557912408b018e137ef86","cross_cats_sorted":["astro-ph.GA"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2015-11-22T19:44:42Z","title_canon_sha256":"e35e1c27a55acfe74747684927be1bb09806d40ef2a0e9ad6be56ccbcdd77012"},"schema_version":"1.0","source":{"id":"1511.07060","kind":"arxiv","version":3}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1511.07060","created_at":"2026-05-18T01:22:10Z"},{"alias_kind":"arxiv_version","alias_value":"1511.07060v3","created_at":"2026-05-18T01:22:10Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1511.07060","created_at":"2026-05-18T01:22:10Z"},{"alias_kind":"pith_short_12","alias_value":"I52DVGJLZQFC","created_at":"2026-05-18T12:29:25Z"},{"alias_kind":"pith_short_16","alias_value":"I52DVGJLZQFCQ3FI","created_at":"2026-05-18T12:29:25Z"},{"alias_kind":"pith_short_8","alias_value":"I52DVGJL","created_at":"2026-05-18T12:29:25Z"}],"graph_snapshots":[{"event_id":"sha256:926b210993f79972f442694574bf1096063ff2887e36b24d9f52da5322ef6b07","target":"graph","created_at":"2026-05-18T01:22:10Z","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":"Utilizing the high-resolution, large-scale LAOZI cosmological simulations we investigate the nature of the metal-poor (${\\rm [Z/H]<-2}$) damped Lyman alpha systems (mpDLA) at $z=3$. The following physical picture of mpDLAs emerges. The majority of mpDLAs inhabit regions $\\ge 20$~kpc from the host galaxy center on infalling cold gas streams originating from the intergalactic medium, with infall velocity of $\\sim 100$ km/s and temperature of $\\sim 10^{4}$ K. For each host galaxy, on average, about $1\\%$ of the area within a radius $150$~kpc is covered by mpDLAs. The mpDLAs are relatively diffuse","authors_text":"Renyue Cen (Princeton University), Sihan Yuan (Princeton University)","cross_cats":["astro-ph.GA"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2015-11-22T19:44:42Z","title":"The Physical Nature of the Most Metal-Poor Damped Lyman Alpha Systems"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1511.07060","kind":"arxiv","version":3},"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":"sha256:8a954993c4a3bb5853bc3cd4f25adee1ad0d9cd1a9dd05309d8e6a9cf619504e","target":"record","created_at":"2026-05-18T01:22:10Z","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":"a8b965d62168613cb4c1637ae22b15aefc56a6c4627557912408b018e137ef86","cross_cats_sorted":["astro-ph.GA"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2015-11-22T19:44:42Z","title_canon_sha256":"e35e1c27a55acfe74747684927be1bb09806d40ef2a0e9ad6be56ccbcdd77012"},"schema_version":"1.0","source":{"id":"1511.07060","kind":"arxiv","version":3}},"canonical_sha256":"47743a992bcc0a286ca8d55af65209bbc50c574f634178b34d5fb74993c2c606","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"47743a992bcc0a286ca8d55af65209bbc50c574f634178b34d5fb74993c2c606","first_computed_at":"2026-05-18T01:22:10.069932Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:22:10.069932Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"ZLEYpWa+Kn5k2nw/gEbWwN7TmDDvCRslbB2FbK87ZP3d8F1/6jULke0k9tLYAgPMPnRIj5INKZcsiG1G6L7ICw==","signature_status":"signed_v1","signed_at":"2026-05-18T01:22:10.070426Z","signed_message":"canonical_sha256_bytes"},"source_id":"1511.07060","source_kind":"arxiv","source_version":3}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:8a954993c4a3bb5853bc3cd4f25adee1ad0d9cd1a9dd05309d8e6a9cf619504e","sha256:926b210993f79972f442694574bf1096063ff2887e36b24d9f52da5322ef6b07"],"state_sha256":"88ac319968af5eeda4976f71221d35c3b005c1cd09193ec6b14430ad7c74cc9a"}