{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2015:I52DVGJLZQFCQ3FI2VNPMUQJXP","short_pith_number":"pith:I52DVGJL","canonical_record":{"source":{"id":"1511.07060","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2015-11-22T19:44:42Z","cross_cats_sorted":["astro-ph.GA"],"title_canon_sha256":"e35e1c27a55acfe74747684927be1bb09806d40ef2a0e9ad6be56ccbcdd77012","abstract_canon_sha256":"a8b965d62168613cb4c1637ae22b15aefc56a6c4627557912408b018e137ef86"},"schema_version":"1.0"},"canonical_sha256":"47743a992bcc0a286ca8d55af65209bbc50c574f634178b34d5fb74993c2c606","source":{"kind":"arxiv","id":"1511.07060","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"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2015:I52DVGJLZQFCQ3FI2VNPMUQJXP","target":"record","payload":{"canonical_record":{"source":{"id":"1511.07060","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2015-11-22T19:44:42Z","cross_cats_sorted":["astro-ph.GA"],"title_canon_sha256":"e35e1c27a55acfe74747684927be1bb09806d40ef2a0e9ad6be56ccbcdd77012","abstract_canon_sha256":"a8b965d62168613cb4c1637ae22b15aefc56a6c4627557912408b018e137ef86"},"schema_version":"1.0"},"canonical_sha256":"47743a992bcc0a286ca8d55af65209bbc50c574f634178b34d5fb74993c2c606","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:22:10.070426Z","signature_b64":"ZLEYpWa+Kn5k2nw/gEbWwN7TmDDvCRslbB2FbK87ZP3d8F1/6jULke0k9tLYAgPMPnRIj5INKZcsiG1G6L7ICw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"47743a992bcc0a286ca8d55af65209bbc50c574f634178b34d5fb74993c2c606","last_reissued_at":"2026-05-18T01:22:10.069932Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:22:10.069932Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1511.07060","source_version":3,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T01:22:10Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"/I39C1pcfABc+3g78/FEVtvGr6WZWfuc7IW05+gfYSyJjaou59Y8hjX1G8hQP/FS1ZpouNPlcjCkG/UUmTAWDg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-23T21:54:33.989411Z"},"content_sha256":"8a954993c4a3bb5853bc3cd4f25adee1ad0d9cd1a9dd05309d8e6a9cf619504e","schema_version":"1.0","event_id":"sha256:8a954993c4a3bb5853bc3cd4f25adee1ad0d9cd1a9dd05309d8e6a9cf619504e"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2015:I52DVGJLZQFCQ3FI2VNPMUQJXP","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"The Physical Nature of the Most Metal-Poor Damped Lyman Alpha Systems","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.GA"],"primary_cat":"astro-ph.CO","authors_text":"Renyue Cen (Princeton University), Sihan Yuan (Princeton University)","submitted_at":"2015-11-22T19:44:42Z","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"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1511.07060","kind":"arxiv","version":3},"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"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T01:22:10Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"5cWm8M9vLSc0PcRPmRDIm5lRhsrCmD3CpK8jUCyKw0Sa2rjBDRRTn9jktVoRBSvbIzAg10QYKz1hPcIL+kdCDw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-23T21:54:33.990102Z"},"content_sha256":"926b210993f79972f442694574bf1096063ff2887e36b24d9f52da5322ef6b07","schema_version":"1.0","event_id":"sha256:926b210993f79972f442694574bf1096063ff2887e36b24d9f52da5322ef6b07"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/I52DVGJLZQFCQ3FI2VNPMUQJXP/bundle.json","state_url":"https://pith.science/pith/I52DVGJLZQFCQ3FI2VNPMUQJXP/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/I52DVGJLZQFCQ3FI2VNPMUQJXP/bundle.json","status":"primary"}],"public_keys":[{"key_id":"pith-v1-2026-05","algorithm":"ed25519","format":"raw","public_key_b64":"stVStoiQhXFxp4s2pdzPNoqVNBMojDU/fJ2db5S3CbM=","public_key_hex":"b2d552b68890857171a78b36a5dccf368a953413288c353f7c9d9d6f94b709b3","fingerprint_sha256_b32_first128bits":"RVFV5Z2OI2J3ZUO7ERDEBCYNKS","fingerprint_sha256_hex":"8d4b5ee74e4693bcd1df2446408b0d54","rotates_at":null,"url":"https://pith.science/pith-signing-key.json","notes":"Pith uses this Ed25519 key to sign canonical record SHA-256 digests. Verify with: ed25519_verify(public_key, message=canonical_sha256_bytes, signature=base64decode(signature_b64))."}],"merge_version":"pith-open-graph-merge-v1","built_at":"2026-05-23T21:54:33Z","links":{"resolver":"https://pith.science/pith/I52DVGJLZQFCQ3FI2VNPMUQJXP","bundle":"https://pith.science/pith/I52DVGJLZQFCQ3FI2VNPMUQJXP/bundle.json","state":"https://pith.science/pith/I52DVGJLZQFCQ3FI2VNPMUQJXP/state.json","well_known_bundle":"https://pith.science/.well-known/pith/I52DVGJLZQFCQ3FI2VNPMUQJXP/bundle.json"},"state":{"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"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"234dRUnWuyhvM1bGpx29FyOpO9Q1tDaRgPLy2SAKIjTEVwvkjbHxe9x5yma6MYqU40hUbadC26AvmdxH8DP6AA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-23T21:54:33.994239Z","bundle_sha256":"32bc71e412daa423eac20d9279ef5231b604222c0fd7fdc6599a38550232583f"}}