{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2016:GZHFRDXI3VAOYK25J633VICPH5","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":"8c190cfc8e699a41980573a4dce033e2b3abf94f42bb60bf99ac8408ed999081","cross_cats_sorted":["astro-ph.CO"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2016-01-26T21:06:10Z","title_canon_sha256":"619056e5bb4518ccc9b2e6a22a1875201cf761db1f77cff44d2da6f165ba5fde"},"schema_version":"1.0","source":{"id":"1601.07188","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1601.07188","created_at":"2026-05-18T01:11:12Z"},{"alias_kind":"arxiv_version","alias_value":"1601.07188v2","created_at":"2026-05-18T01:11:12Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1601.07188","created_at":"2026-05-18T01:11:12Z"},{"alias_kind":"pith_short_12","alias_value":"GZHFRDXI3VAO","created_at":"2026-05-18T12:30:19Z"},{"alias_kind":"pith_short_16","alias_value":"GZHFRDXI3VAOYK25","created_at":"2026-05-18T12:30:19Z"},{"alias_kind":"pith_short_8","alias_value":"GZHFRDXI","created_at":"2026-05-18T12:30:19Z"}],"graph_snapshots":[{"event_id":"sha256:50b9f0faa4433b740a903270cf17ca0e19aa04acf88e5bf66f994f0dc8172ddd","target":"graph","created_at":"2026-05-18T01:11:12Z","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":"Observations reveal that quasar host halos at z~2 have large covering fractions of cool dense gas (>~60% for Lyman limit systems within a projected virial radius). Most simulations have so far have failed to explain these large observed covering fractions. We analyze a new set of 15 simulated massive halos with explicit stellar feedback from the FIRE project, covering the halo mass range M_h~2x10^12-10^13 Msun at z=2. This extends our previous analysis of the circum-galactic medium of high-redshift galaxies to more massive halos. AGN feedback is not included in these simulations. We find Lyman","authors_text":"(2) UC Berkeley, (3) UC San Diego, (4) Caltech, (5) CITA), C.-A. Faucher-Giguere (1), D. Keres (3), E. Quataert (2), N. Murray (5) ((1) Northwestern, P. F. Hopkins (4), R. Feldmann (2)","cross_cats":["astro-ph.CO"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2016-01-26T21:06:10Z","title":"A Stellar Feedback Origin for Neutral Hydrogen in High-Redshift Quasar-Mass Halos"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1601.07188","kind":"arxiv","version":2},"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":"sha256:5fcebc895462d54f31e6a03125802ee364c519f99125d3ed43f39b7bfa472d9f","target":"record","created_at":"2026-05-18T01:11:12Z","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":"8c190cfc8e699a41980573a4dce033e2b3abf94f42bb60bf99ac8408ed999081","cross_cats_sorted":["astro-ph.CO"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2016-01-26T21:06:10Z","title_canon_sha256":"619056e5bb4518ccc9b2e6a22a1875201cf761db1f77cff44d2da6f165ba5fde"},"schema_version":"1.0","source":{"id":"1601.07188","kind":"arxiv","version":2}},"canonical_sha256":"364e588ee8dd40ec2b5d4fb7baa04f3f45ea7fabb828e52a3a67aeb9de61f769","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"364e588ee8dd40ec2b5d4fb7baa04f3f45ea7fabb828e52a3a67aeb9de61f769","first_computed_at":"2026-05-18T01:11:12.871236Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:11:12.871236Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"mHBnwnwkmcYnk0fhHzMWkQFWC6t0y9riV+1gG4FxCtD3/tBc9IENPJrG/40laCQNvfp4aYCcegTDd06Q29VGBw==","signature_status":"signed_v1","signed_at":"2026-05-18T01:11:12.871742Z","signed_message":"canonical_sha256_bytes"},"source_id":"1601.07188","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:5fcebc895462d54f31e6a03125802ee364c519f99125d3ed43f39b7bfa472d9f","sha256:50b9f0faa4433b740a903270cf17ca0e19aa04acf88e5bf66f994f0dc8172ddd"],"state_sha256":"9feb290d5f4cd7622146750a16aaad22c820572acef08c4f80a2033cb8b4fa3d"}