{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2010:UUTTXK4LFLGEAXTSQHISOXT3MC","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":"a8a330c5abb9a96486d3e7adb9ff65ceab7e7fb00aaca8765d553ccc296eef7e","cross_cats_sorted":["astro-ph.CO"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2010-11-12T21:19:27Z","title_canon_sha256":"b20b502102aa1818e3d04d98cf3b1aeeca1e376e14e86914b9552e4bf2a69697"},"schema_version":"1.0","source":{"id":"1011.3054","kind":"arxiv","version":3}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1011.3054","created_at":"2026-05-18T02:04:48Z"},{"alias_kind":"arxiv_version","alias_value":"1011.3054v3","created_at":"2026-05-18T02:04:48Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1011.3054","created_at":"2026-05-18T02:04:48Z"},{"alias_kind":"pith_short_12","alias_value":"UUTTXK4LFLGE","created_at":"2026-05-18T12:26:15Z"},{"alias_kind":"pith_short_16","alias_value":"UUTTXK4LFLGEAXTS","created_at":"2026-05-18T12:26:15Z"},{"alias_kind":"pith_short_8","alias_value":"UUTTXK4L","created_at":"2026-05-18T12:26:15Z"}],"graph_snapshots":[{"event_id":"sha256:17dd34293b782b6bd55cb9e25a84fa237b6d2990f376d491524a51ee536052e7","target":"graph","created_at":"2026-05-18T02:04:48Z","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 of spiral galaxies show a strong linear correlation between the ratio of molecular to atomic hydrogen surface density R_mol and midplane pressure. To explain this, we simulate three-dimensional, magnetized turbulence, including simplified treatments of non-equilibrium chemistry and the propagation of dissociating radiation, to follow the formation of H_2 from cold atomic gas. The formation time scale for H_2 is sufficiently long that equilibrium is not reached within the 20-30 Myr lifetimes of molecular clouds. The equilibrium balance between radiative dissociation and H_2 formati","authors_text":"Mordecai-Mark Mac Low, Simon C. O. Glover","cross_cats":["astro-ph.CO"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2010-11-12T21:19:27Z","title":"The Abundance of Molecular Hydrogen and its Correlation with Midplane Pressure in Galaxies: Non-Equilibrium, Turbulent, Chemical Models"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1011.3054","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":"sha256:454e5cf86a335ad5d1b57c1c1c2d5598a6d86eb8c591bd1ea650b74a33610f1d","target":"record","created_at":"2026-05-18T02:04:48Z","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":"a8a330c5abb9a96486d3e7adb9ff65ceab7e7fb00aaca8765d553ccc296eef7e","cross_cats_sorted":["astro-ph.CO"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2010-11-12T21:19:27Z","title_canon_sha256":"b20b502102aa1818e3d04d98cf3b1aeeca1e376e14e86914b9552e4bf2a69697"},"schema_version":"1.0","source":{"id":"1011.3054","kind":"arxiv","version":3}},"canonical_sha256":"a5273bab8b2acc405e7281d1275e7b608ecd2ac5ba5bbdb2dc176923b9869c1f","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"a5273bab8b2acc405e7281d1275e7b608ecd2ac5ba5bbdb2dc176923b9869c1f","first_computed_at":"2026-05-18T02:04:48.096381Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:04:48.096381Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"SHI5JCp5Wdbyhmwqce24eAtD+Wrw9Cw5ZRqeKkdA6qDnLlQUpWP1N7ppSQ2vupf2O+dep3NZarV38FoRNCKPAA==","signature_status":"signed_v1","signed_at":"2026-05-18T02:04:48.096927Z","signed_message":"canonical_sha256_bytes"},"source_id":"1011.3054","source_kind":"arxiv","source_version":3}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:454e5cf86a335ad5d1b57c1c1c2d5598a6d86eb8c591bd1ea650b74a33610f1d","sha256:17dd34293b782b6bd55cb9e25a84fa237b6d2990f376d491524a51ee536052e7"],"state_sha256":"fd115115a6d77293ab1777611bd791780a0df4ede91a98923c271188510b4b16"}