{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2008:FOFDA2OFW5OI2VPFUG6ON37K5M","short_pith_number":"pith:FOFDA2OF","schema_version":"1.0","canonical_sha256":"2b8a3069c5b75c8d55e5a1bce6efeaeb160426f0f134b141f6405a56511cb364","source":{"kind":"arxiv","id":"0810.4148","version":2},"attestation_state":"computed","paper":{"title":"Modeling Molecular Hydrogen and Star Formation in Cosmological Simulations","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"Andrey V. Kravtsov, Konstantinos Tassis, Nickolay Y. Gnedin","submitted_at":"2008-10-22T20:06:12Z","abstract_excerpt":"We describe a phenomenological model for molecular hydrogen formation suited for applications in galaxy formation simulations, which includes on-equilibrium formation of molecular hydrogen on dust and approximate treatment of both its self-shielding and shielding by dust from the dissociating UV radiation. The model is applicable in simulations in which individual star forming regions - the giant molecular complexes - can be identified (resolution of tens of pc) and their mean internal density estimated reliably, even if internal structure is not resolved. In agreement with previous studies, c"},"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":"0810.4148","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph","submitted_at":"2008-10-22T20:06:12Z","cross_cats_sorted":[],"title_canon_sha256":"60b4fa28897ec08555eb2fb9c768fc5fb2f334480f305d7bcf5c1108c721f414","abstract_canon_sha256":"f10ab1cd3d0e1ae55e087f54daeab621050c6ddb26734e7cd55c164a6ee25938"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T04:32:34.856835Z","signature_b64":"LMFwl9qhHvBsBoEOqwtWo6d0Aw4V1AAKexH4CMu6w+ImeKcm9xgAv4tpCEUC2CB8YNH5w8XU84FOofsYe7JhBA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"2b8a3069c5b75c8d55e5a1bce6efeaeb160426f0f134b141f6405a56511cb364","last_reissued_at":"2026-05-18T04:32:34.856191Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T04:32:34.856191Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Modeling Molecular Hydrogen and Star Formation in Cosmological Simulations","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"Andrey V. Kravtsov, Konstantinos Tassis, Nickolay Y. Gnedin","submitted_at":"2008-10-22T20:06:12Z","abstract_excerpt":"We describe a phenomenological model for molecular hydrogen formation suited for applications in galaxy formation simulations, which includes on-equilibrium formation of molecular hydrogen on dust and approximate treatment of both its self-shielding and shielding by dust from the dissociating UV radiation. The model is applicable in simulations in which individual star forming regions - the giant molecular complexes - can be identified (resolution of tens of pc) and their mean internal density estimated reliably, even if internal structure is not resolved. In agreement with previous studies, c"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0810.4148","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":"0810.4148","created_at":"2026-05-18T04:32:34.856291+00:00"},{"alias_kind":"arxiv_version","alias_value":"0810.4148v2","created_at":"2026-05-18T04:32:34.856291+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0810.4148","created_at":"2026-05-18T04:32:34.856291+00:00"},{"alias_kind":"pith_short_12","alias_value":"FOFDA2OFW5OI","created_at":"2026-05-18T12:25:57.157939+00:00"},{"alias_kind":"pith_short_16","alias_value":"FOFDA2OFW5OI2VPF","created_at":"2026-05-18T12:25:57.157939+00:00"},{"alias_kind":"pith_short_8","alias_value":"FOFDA2OF","created_at":"2026-05-18T12:25:57.157939+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/FOFDA2OFW5OI2VPFUG6ON37K5M","json":"https://pith.science/pith/FOFDA2OFW5OI2VPFUG6ON37K5M.json","graph_json":"https://pith.science/api/pith-number/FOFDA2OFW5OI2VPFUG6ON37K5M/graph.json","events_json":"https://pith.science/api/pith-number/FOFDA2OFW5OI2VPFUG6ON37K5M/events.json","paper":"https://pith.science/paper/FOFDA2OF"},"agent_actions":{"view_html":"https://pith.science/pith/FOFDA2OFW5OI2VPFUG6ON37K5M","download_json":"https://pith.science/pith/FOFDA2OFW5OI2VPFUG6ON37K5M.json","view_paper":"https://pith.science/paper/FOFDA2OF","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=0810.4148&json=true","fetch_graph":"https://pith.science/api/pith-number/FOFDA2OFW5OI2VPFUG6ON37K5M/graph.json","fetch_events":"https://pith.science/api/pith-number/FOFDA2OFW5OI2VPFUG6ON37K5M/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/FOFDA2OFW5OI2VPFUG6ON37K5M/action/timestamp_anchor","attest_storage":"https://pith.science/pith/FOFDA2OFW5OI2VPFUG6ON37K5M/action/storage_attestation","attest_author":"https://pith.science/pith/FOFDA2OFW5OI2VPFUG6ON37K5M/action/author_attestation","sign_citation":"https://pith.science/pith/FOFDA2OFW5OI2VPFUG6ON37K5M/action/citation_signature","submit_replication":"https://pith.science/pith/FOFDA2OFW5OI2VPFUG6ON37K5M/action/replication_record"}},"created_at":"2026-05-18T04:32:34.856291+00:00","updated_at":"2026-05-18T04:32:34.856291+00:00"}