{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2025:XAYVJNXS63OZBELX2KMKSKABFA","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":"503d2524b6d96e2146d38f79b4ec9e40b5aef7abe1787d946c8658d77408ae66","cross_cats_sorted":["astro-ph.CO"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2025-03-06T19:00:00Z","title_canon_sha256":"24f1126c495e93a62b5c32101930ebda37dd97e32a9923d3e3ef7a57c7dd6b35"},"schema_version":"1.0","source":{"id":"2503.04885","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2503.04885","created_at":"2026-07-05T10:46:01Z"},{"alias_kind":"arxiv_version","alias_value":"2503.04885v2","created_at":"2026-07-05T10:46:01Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2503.04885","created_at":"2026-07-05T10:46:01Z"},{"alias_kind":"pith_short_12","alias_value":"XAYVJNXS63OZ","created_at":"2026-07-05T10:46:01Z"},{"alias_kind":"pith_short_16","alias_value":"XAYVJNXS63OZBELX","created_at":"2026-07-05T10:46:01Z"},{"alias_kind":"pith_short_8","alias_value":"XAYVJNXS","created_at":"2026-07-05T10:46:01Z"}],"graph_snapshots":[{"event_id":"sha256:182377a1fba7e4661d857b18f1eece982f7ef78d422617054afcd28d1bb7e246","target":"graph","created_at":"2026-07-05T10:46:01Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/2503.04885/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We study the impact of molecular (${\\rm H_2}$) and atomic (HI) hydrogen cooling on the galaxy formation threshold. We calculate the fraction of dark matter (DM) halos that exceeds a critical mass required for star formation, $M_{\\mathrm{crit}}(z)$, as a function of their peak mass. By convolving analytic halo mass accretion histories (MAHs) with models for $M_{\\mathrm{crit}}(z)$, we predict that halos with peak virial masses below $\\sim 10^8~M_{\\mathrm{\\odot}}$ can form stars before reionization through ${\\rm H_2}$ cooling. These halos remain dark when only HI cooling and reionization are mode","authors_text":"Ethan O. Nadler","cross_cats":["astro-ph.CO"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2025-03-06T19:00:00Z","title":"The Impact of Molecular Hydrogen Cooling on the Galaxy Formation Threshold"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2503.04885","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":"sha256:4ebac27983bc8feb458abdc313429ba0388d4a2d99d82694703e73e0b4a5d07b","target":"record","created_at":"2026-07-05T10:46:01Z","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":"503d2524b6d96e2146d38f79b4ec9e40b5aef7abe1787d946c8658d77408ae66","cross_cats_sorted":["astro-ph.CO"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2025-03-06T19:00:00Z","title_canon_sha256":"24f1126c495e93a62b5c32101930ebda37dd97e32a9923d3e3ef7a57c7dd6b35"},"schema_version":"1.0","source":{"id":"2503.04885","kind":"arxiv","version":2}},"canonical_sha256":"b83154b6f2f6dd909177d298a92801283dd4d957faf4c0dd7ecfd93a91506356","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"b83154b6f2f6dd909177d298a92801283dd4d957faf4c0dd7ecfd93a91506356","first_computed_at":"2026-07-05T10:46:01.862258Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T10:46:01.862258Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"bTzFDbiVp2RksbiUkUpt1NHQiPX9DVqC9Z80gx+zO22aHBxcJk91xAHDwNEeI34AqvMaTAswY9SFhAgwhBBSCA==","signature_status":"signed_v1","signed_at":"2026-07-05T10:46:01.862905Z","signed_message":"canonical_sha256_bytes"},"source_id":"2503.04885","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:4ebac27983bc8feb458abdc313429ba0388d4a2d99d82694703e73e0b4a5d07b","sha256:182377a1fba7e4661d857b18f1eece982f7ef78d422617054afcd28d1bb7e246"],"state_sha256":"918038b6f223ff6f23009edc55110b6fb6ae3671f55afd1a5d5ca692b68805a3"}