{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2003:3BIDLUSYQ7EHCDZ6ZJUYSUMWKA","short_pith_number":"pith:3BIDLUSY","schema_version":"1.0","canonical_sha256":"d85035d25887c8710f3eca6989519650165573b5705d7127c51b0883fb387a6b","source":{"kind":"arxiv","id":"astro-ph/0310331","version":3},"attestation_state":"computed","paper":{"title":"Reionisation, chemical enrichment and seed black holes from the first stars: is Population III important?","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"Cambridge), Jeremiah P. Ostriker (IoA, Massimo Ricotti","submitted_at":"2003-10-13T16:38:52Z","abstract_excerpt":"We investigate the effects of a top-heavy stellar initial mass function on the reionisation history of the intergalactic medium (IGM). We use cosmological simulations that include self-consistently the feedback from ionising radiation, H_2 dissociating radiation and supernova (SN) explosions. We find that it is difficult to reionise the IGM at z_rei>10 with stellar sources even after making extreme assumptions. If star formation in 10^9 M_\\odot galaxies is not suppressed by SN explosions, the optical depth to Thomson scattering is tau_e< 0.13. If we allow for the normal energy input from SNe o"},"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":"astro-ph/0310331","kind":"arxiv","version":3},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"2003-10-13T16:38:52Z","cross_cats_sorted":[],"title_canon_sha256":"b0bc9be7c8861038b7ddeb8325e32ea66389150987c505acc28692d91036641d","abstract_canon_sha256":"cea04d971b240d94804873848f1a3461b2b18d4eab72a2b5c385067b964b5b51"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-04T15:20:12.586964Z","signature_b64":"PhcoywLrjdOG9HboIT6Bz15Niz6g9jj2PCRyzAeiRnDsKxEuCX0FFmNhEabw/rEBTNN1Ps9B/PIn6C/jsbJqAA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"d85035d25887c8710f3eca6989519650165573b5705d7127c51b0883fb387a6b","last_reissued_at":"2026-07-04T15:20:12.586552Z","signature_status":"signed_v1","first_computed_at":"2026-07-04T15:20:12.586552Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Reionisation, chemical enrichment and seed black holes from the first stars: is Population III important?","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"Cambridge), Jeremiah P. Ostriker (IoA, Massimo Ricotti","submitted_at":"2003-10-13T16:38:52Z","abstract_excerpt":"We investigate the effects of a top-heavy stellar initial mass function on the reionisation history of the intergalactic medium (IGM). We use cosmological simulations that include self-consistently the feedback from ionising radiation, H_2 dissociating radiation and supernova (SN) explosions. We find that it is difficult to reionise the IGM at z_rei>10 with stellar sources even after making extreme assumptions. If star formation in 10^9 M_\\odot galaxies is not suppressed by SN explosions, the optical depth to Thomson scattering is tau_e< 0.13. If we allow for the normal energy input from SNe o"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0310331","kind":"arxiv","version":3},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/astro-ph/0310331/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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":"astro-ph/0310331","created_at":"2026-07-04T15:20:12.586617+00:00"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/0310331v3","created_at":"2026-07-04T15:20:12.586617+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/0310331","created_at":"2026-07-04T15:20:12.586617+00:00"},{"alias_kind":"pith_short_12","alias_value":"3BIDLUSYQ7EH","created_at":"2026-07-04T15:20:12.586617+00:00"},{"alias_kind":"pith_short_16","alias_value":"3BIDLUSYQ7EHCDZ6","created_at":"2026-07-04T15:20:12.586617+00:00"},{"alias_kind":"pith_short_8","alias_value":"3BIDLUSY","created_at":"2026-07-04T15:20:12.586617+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/3BIDLUSYQ7EHCDZ6ZJUYSUMWKA","json":"https://pith.science/pith/3BIDLUSYQ7EHCDZ6ZJUYSUMWKA.json","graph_json":"https://pith.science/api/pith-number/3BIDLUSYQ7EHCDZ6ZJUYSUMWKA/graph.json","events_json":"https://pith.science/api/pith-number/3BIDLUSYQ7EHCDZ6ZJUYSUMWKA/events.json","paper":"https://pith.science/paper/3BIDLUSY"},"agent_actions":{"view_html":"https://pith.science/pith/3BIDLUSYQ7EHCDZ6ZJUYSUMWKA","download_json":"https://pith.science/pith/3BIDLUSYQ7EHCDZ6ZJUYSUMWKA.json","view_paper":"https://pith.science/paper/3BIDLUSY","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=astro-ph/0310331&json=true","fetch_graph":"https://pith.science/api/pith-number/3BIDLUSYQ7EHCDZ6ZJUYSUMWKA/graph.json","fetch_events":"https://pith.science/api/pith-number/3BIDLUSYQ7EHCDZ6ZJUYSUMWKA/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/3BIDLUSYQ7EHCDZ6ZJUYSUMWKA/action/timestamp_anchor","attest_storage":"https://pith.science/pith/3BIDLUSYQ7EHCDZ6ZJUYSUMWKA/action/storage_attestation","attest_author":"https://pith.science/pith/3BIDLUSYQ7EHCDZ6ZJUYSUMWKA/action/author_attestation","sign_citation":"https://pith.science/pith/3BIDLUSYQ7EHCDZ6ZJUYSUMWKA/action/citation_signature","submit_replication":"https://pith.science/pith/3BIDLUSYQ7EHCDZ6ZJUYSUMWKA/action/replication_record"}},"created_at":"2026-07-04T15:20:12.586617+00:00","updated_at":"2026-07-04T15:20:12.586617+00:00"}