{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2015:F2SRI5RZCRIHKUTD2FGE2INSEV","short_pith_number":"pith:F2SRI5RZ","schema_version":"1.0","canonical_sha256":"2ea51476391450755263d14c4d21b2255930ba3f54247c4d170e796d569d2678","source":{"kind":"arxiv","id":"1503.07880","version":2},"attestation_state":"computed","paper":{"title":"The Difficulty of Getting High Escape Fractions of Ionizing Photons from High-redshift Galaxies: a View from the FIRE Cosmological Simulations","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.CO"],"primary_cat":"astro-ph.GA","authors_text":"(2) UC Berkeley, 3), (3) LBNL, (4) Northwestern, (5) UCSD, (6) CITA), Claude-Andre Faucher-Giguere (4), Daniel Kasen (2, Dusan Keres (5), Eliot Quataert (2), Norman Murray (6) ((1) Caltech, Philip F. Hopkins (1), Xiangcheng Ma (1)","submitted_at":"2015-03-26T20:01:14Z","abstract_excerpt":"We present a series of high-resolution (20-2000 Msun, 0.1-4 pc) cosmological zoom-in simulations at z~6 from the Feedback In Realistic Environment (FIRE) project. These simulations cover halo masses 10^9-10^11 Msun and rest-frame ultraviolet magnitude Muv = -9 to -19. These simulations include explicit models of the multi-phase ISM, star formation, and stellar feedback, which produce reasonable galaxy properties at z = 0-6. We post-process the snapshots with a radiative transfer code to evaluate the escape fraction (fesc) of hydrogen ionizing photons. We find that the instantaneous fesc has la"},"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":"1503.07880","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2015-03-26T20:01:14Z","cross_cats_sorted":["astro-ph.CO"],"title_canon_sha256":"79a0d48491c08a08d6569a328b6456f85f8c1f2c5d28d3654864f4e45ece06eb","abstract_canon_sha256":"663cc4339f18de65513145d0b76a1d6d46f308886d9a5770c613339453b26d64"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:33:43.694253Z","signature_b64":"svjEqibrei7eJ3Cod5cOuF7UU5Gs6ecleCrWZkjLUrQKj896fjFbQBdhgQeh2jl6pplF3pCC8kFpWizdZs3yBw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"2ea51476391450755263d14c4d21b2255930ba3f54247c4d170e796d569d2678","last_reissued_at":"2026-05-18T01:33:43.693736Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:33:43.693736Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"The Difficulty of Getting High Escape Fractions of Ionizing Photons from High-redshift Galaxies: a View from the FIRE Cosmological Simulations","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.CO"],"primary_cat":"astro-ph.GA","authors_text":"(2) UC Berkeley, 3), (3) LBNL, (4) Northwestern, (5) UCSD, (6) CITA), Claude-Andre Faucher-Giguere (4), Daniel Kasen (2, Dusan Keres (5), Eliot Quataert (2), Norman Murray (6) ((1) Caltech, Philip F. Hopkins (1), Xiangcheng Ma (1)","submitted_at":"2015-03-26T20:01:14Z","abstract_excerpt":"We present a series of high-resolution (20-2000 Msun, 0.1-4 pc) cosmological zoom-in simulations at z~6 from the Feedback In Realistic Environment (FIRE) project. These simulations cover halo masses 10^9-10^11 Msun and rest-frame ultraviolet magnitude Muv = -9 to -19. These simulations include explicit models of the multi-phase ISM, star formation, and stellar feedback, which produce reasonable galaxy properties at z = 0-6. We post-process the snapshots with a radiative transfer code to evaluate the escape fraction (fesc) of hydrogen ionizing photons. We find that the instantaneous fesc has la"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1503.07880","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":"1503.07880","created_at":"2026-05-18T01:33:43.693828+00:00"},{"alias_kind":"arxiv_version","alias_value":"1503.07880v2","created_at":"2026-05-18T01:33:43.693828+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1503.07880","created_at":"2026-05-18T01:33:43.693828+00:00"},{"alias_kind":"pith_short_12","alias_value":"F2SRI5RZCRIH","created_at":"2026-05-18T12:29:19.899920+00:00"},{"alias_kind":"pith_short_16","alias_value":"F2SRI5RZCRIHKUTD","created_at":"2026-05-18T12:29:19.899920+00:00"},{"alias_kind":"pith_short_8","alias_value":"F2SRI5RZ","created_at":"2026-05-18T12:29:19.899920+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/F2SRI5RZCRIHKUTD2FGE2INSEV","json":"https://pith.science/pith/F2SRI5RZCRIHKUTD2FGE2INSEV.json","graph_json":"https://pith.science/api/pith-number/F2SRI5RZCRIHKUTD2FGE2INSEV/graph.json","events_json":"https://pith.science/api/pith-number/F2SRI5RZCRIHKUTD2FGE2INSEV/events.json","paper":"https://pith.science/paper/F2SRI5RZ"},"agent_actions":{"view_html":"https://pith.science/pith/F2SRI5RZCRIHKUTD2FGE2INSEV","download_json":"https://pith.science/pith/F2SRI5RZCRIHKUTD2FGE2INSEV.json","view_paper":"https://pith.science/paper/F2SRI5RZ","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1503.07880&json=true","fetch_graph":"https://pith.science/api/pith-number/F2SRI5RZCRIHKUTD2FGE2INSEV/graph.json","fetch_events":"https://pith.science/api/pith-number/F2SRI5RZCRIHKUTD2FGE2INSEV/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/F2SRI5RZCRIHKUTD2FGE2INSEV/action/timestamp_anchor","attest_storage":"https://pith.science/pith/F2SRI5RZCRIHKUTD2FGE2INSEV/action/storage_attestation","attest_author":"https://pith.science/pith/F2SRI5RZCRIHKUTD2FGE2INSEV/action/author_attestation","sign_citation":"https://pith.science/pith/F2SRI5RZCRIHKUTD2FGE2INSEV/action/citation_signature","submit_replication":"https://pith.science/pith/F2SRI5RZCRIHKUTD2FGE2INSEV/action/replication_record"}},"created_at":"2026-05-18T01:33:43.693828+00:00","updated_at":"2026-05-18T01:33:43.693828+00:00"}