{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2013:HZDPNVGCYL4Y72LQAH645DRJPD","short_pith_number":"pith:HZDPNVGC","schema_version":"1.0","canonical_sha256":"3e46f6d4c2c2f98fe97001fdce8e2978e748c550d90c369d8a40502efeaa961a","source":{"kind":"arxiv","id":"1301.0063","version":2},"attestation_state":"computed","paper":{"title":"Molecular hydrogen regulated star formation in cosmological SPH simulations","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.CO","authors_text":"Jason Jaacks, Jun-Hwan Choi, Kentaro Nagamine, Robert Thompson","submitted_at":"2013-01-01T06:57:12Z","abstract_excerpt":"It has been shown observationally that star formation (SF) correlates tightly with the presence of molecular hydrogen (H$_2$). Therefore it would be important to investigate its implication on galaxy formation in a cosmological context. In the present work, we track the H$_2$ mass fraction within our cosmological smoothed particle hydrodynamics (SPH) code GADGET-3 using an equilibrium analytic model by Krumholz et al. This model allows us to regulate the star formation in our simulation by the local abundance of H$_2$ rather than the total cold gas density, and naturally introduce the dependen"},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"1301.0063","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2013-01-01T06:57:12Z","cross_cats_sorted":[],"title_canon_sha256":"ed64ecf9d5d577cefd41369e6bd53cba67e91a45025e4bf4c4b41cbd67dc47da","abstract_canon_sha256":"91fe74c7b150a3548a2450e40d8dc3788847f00a5d6bd3a2067704c4f4e7b6c9"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:52:22.432114Z","signature_b64":"Iy7lYG3bk1ZGa24Gpfz42XyYsBtNqcZg9G935BLv0YQj6oR9+CXwOAkuDEHb42aBcGPP5wsJ2ohMz/Ab/cajCg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"3e46f6d4c2c2f98fe97001fdce8e2978e748c550d90c369d8a40502efeaa961a","last_reissued_at":"2026-05-18T01:52:22.431603Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:52:22.431603Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Molecular hydrogen regulated star formation in cosmological SPH simulations","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.CO","authors_text":"Jason Jaacks, Jun-Hwan Choi, Kentaro Nagamine, Robert Thompson","submitted_at":"2013-01-01T06:57:12Z","abstract_excerpt":"It has been shown observationally that star formation (SF) correlates tightly with the presence of molecular hydrogen (H$_2$). Therefore it would be important to investigate its implication on galaxy formation in a cosmological context. In the present work, we track the H$_2$ mass fraction within our cosmological smoothed particle hydrodynamics (SPH) code GADGET-3 using an equilibrium analytic model by Krumholz et al. This model allows us to regulate the star formation in our simulation by the local abundance of H$_2$ rather than the total cold gas density, and naturally introduce the dependen"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1301.0063","kind":"arxiv","version":2},"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"},"aliases":[{"alias_kind":"arxiv","alias_value":"1301.0063","created_at":"2026-05-18T01:52:22.431679+00:00"},{"alias_kind":"arxiv_version","alias_value":"1301.0063v2","created_at":"2026-05-18T01:52:22.431679+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1301.0063","created_at":"2026-05-18T01:52:22.431679+00:00"},{"alias_kind":"pith_short_12","alias_value":"HZDPNVGCYL4Y","created_at":"2026-05-18T12:27:46.883200+00:00"},{"alias_kind":"pith_short_16","alias_value":"HZDPNVGCYL4Y72LQ","created_at":"2026-05-18T12:27:46.883200+00:00"},{"alias_kind":"pith_short_8","alias_value":"HZDPNVGC","created_at":"2026-05-18T12:27:46.883200+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":0,"internal_anchor_count":0,"sample":[]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/HZDPNVGCYL4Y72LQAH645DRJPD","json":"https://pith.science/pith/HZDPNVGCYL4Y72LQAH645DRJPD.json","graph_json":"https://pith.science/api/pith-number/HZDPNVGCYL4Y72LQAH645DRJPD/graph.json","events_json":"https://pith.science/api/pith-number/HZDPNVGCYL4Y72LQAH645DRJPD/events.json","paper":"https://pith.science/paper/HZDPNVGC"},"agent_actions":{"view_html":"https://pith.science/pith/HZDPNVGCYL4Y72LQAH645DRJPD","download_json":"https://pith.science/pith/HZDPNVGCYL4Y72LQAH645DRJPD.json","view_paper":"https://pith.science/paper/HZDPNVGC","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1301.0063&json=true","fetch_graph":"https://pith.science/api/pith-number/HZDPNVGCYL4Y72LQAH645DRJPD/graph.json","fetch_events":"https://pith.science/api/pith-number/HZDPNVGCYL4Y72LQAH645DRJPD/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/HZDPNVGCYL4Y72LQAH645DRJPD/action/timestamp_anchor","attest_storage":"https://pith.science/pith/HZDPNVGCYL4Y72LQAH645DRJPD/action/storage_attestation","attest_author":"https://pith.science/pith/HZDPNVGCYL4Y72LQAH645DRJPD/action/author_attestation","sign_citation":"https://pith.science/pith/HZDPNVGCYL4Y72LQAH645DRJPD/action/citation_signature","submit_replication":"https://pith.science/pith/HZDPNVGCYL4Y72LQAH645DRJPD/action/replication_record"}},"created_at":"2026-05-18T01:52:22.431679+00:00","updated_at":"2026-05-18T01:52:22.431679+00:00"}