{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:4D22M5ALWDZZVSY2MZXJKM25VR","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":"5a3a014e7fd4eb91c8a768dede7e3c458e2c6ff5d8f74d972f829a18b9b4cd83","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2015-05-28T22:18:29Z","title_canon_sha256":"11378f1cacaba8525956d247dfaa0898b94a3edb01cdf366c63f75d912082019"},"schema_version":"1.0","source":{"id":"1505.07875","kind":"arxiv","version":3}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1505.07875","created_at":"2026-05-18T00:11:00Z"},{"alias_kind":"arxiv_version","alias_value":"1505.07875v3","created_at":"2026-05-18T00:11:00Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1505.07875","created_at":"2026-05-18T00:11:00Z"},{"alias_kind":"pith_short_12","alias_value":"4D22M5ALWDZZ","created_at":"2026-05-18T12:29:05Z"},{"alias_kind":"pith_short_16","alias_value":"4D22M5ALWDZZVSY2","created_at":"2026-05-18T12:29:05Z"},{"alias_kind":"pith_short_8","alias_value":"4D22M5AL","created_at":"2026-05-18T12:29:05Z"}],"graph_snapshots":[{"event_id":"sha256:b2abf4102e9b3270853ed5b5accf72dfedb857ca18a6ec083c73028522d50a6f","target":"graph","created_at":"2026-05-18T00:11:00Z","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":"Cosmological simulations of the low-density intergalactic medium exhibit a strikingly tight power-law relation between temperature and density that holds over two decades in density. It is found that this relation should roughly apply Delta z ~ 1-2 after a reionization event, and this limiting behavior has motivated the power-law parameterizations used in most analyses of the Ly-alpha forest. This relation has been explained by using equations linearized in the baryonic overdensity (which does not address why a tight power-law relation holds over two decades in density) or by equating the phot","authors_text":"Matthew McQuinn, Phoebe R. Upton Sanderbeck","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2015-05-28T22:18:29Z","title":"On the intergalactic temperature-density relation"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1505.07875","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:e3007b1c5739aca6380d043d1b8fcc1ed47159d78cafd873e8a72f02b88dc97f","target":"record","created_at":"2026-05-18T00:11:00Z","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":"5a3a014e7fd4eb91c8a768dede7e3c458e2c6ff5d8f74d972f829a18b9b4cd83","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2015-05-28T22:18:29Z","title_canon_sha256":"11378f1cacaba8525956d247dfaa0898b94a3edb01cdf366c63f75d912082019"},"schema_version":"1.0","source":{"id":"1505.07875","kind":"arxiv","version":3}},"canonical_sha256":"e0f5a6740bb0f39acb1a666e95335dac5e353f218fdc1e122b39bdcc686e1076","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"e0f5a6740bb0f39acb1a666e95335dac5e353f218fdc1e122b39bdcc686e1076","first_computed_at":"2026-05-18T00:11:00.817039Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:11:00.817039Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"dQpbwEP4rch7+ANb+eTYGElnl1ig1UFbcXMtmllZ6IYu/X52LjoMMU0gbuic/KweLVM04H6SZPU7e8Wdu3jgBQ==","signature_status":"signed_v1","signed_at":"2026-05-18T00:11:00.817797Z","signed_message":"canonical_sha256_bytes"},"source_id":"1505.07875","source_kind":"arxiv","source_version":3}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:e3007b1c5739aca6380d043d1b8fcc1ed47159d78cafd873e8a72f02b88dc97f","sha256:b2abf4102e9b3270853ed5b5accf72dfedb857ca18a6ec083c73028522d50a6f"],"state_sha256":"02ba99e3532013fb068c8451664c3437fd9a4b90825c5d56e8d42693a3b3e517"}