{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2016:I2CJPRPYXADLJKT2YLY36SYVUT","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":"a03e2a61de45b89368250a844de71cd0e1429f38271f4cc8f158eade0946e91f","cross_cats_sorted":["astro-ph.CO"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2016-02-22T21:00:00Z","title_canon_sha256":"5378551052e338b9894c572f5f98eb0e1b127dbd83eaf61819249644e11202ad"},"schema_version":"1.0","source":{"id":"1602.06948","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1602.06948","created_at":"2026-05-18T01:10:31Z"},{"alias_kind":"arxiv_version","alias_value":"1602.06948v1","created_at":"2026-05-18T01:10:31Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1602.06948","created_at":"2026-05-18T01:10:31Z"},{"alias_kind":"pith_short_12","alias_value":"I2CJPRPYXADL","created_at":"2026-05-18T12:30:22Z"},{"alias_kind":"pith_short_16","alias_value":"I2CJPRPYXADLJKT2","created_at":"2026-05-18T12:30:22Z"},{"alias_kind":"pith_short_8","alias_value":"I2CJPRPY","created_at":"2026-05-18T12:30:22Z"}],"graph_snapshots":[{"event_id":"sha256:8ee334fc80bd23493a50516f6b3fa8bdd83f1633153867f3f04563d2e7ef13c9","target":"graph","created_at":"2026-05-18T01:10:31Z","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"},"paper":{"abstract_excerpt":"We explore the impact of a cosmic ray (CR) background generated by supernova explosions from the first stars on star-forming metal-free gas in a minihalo at $z\\sim25$. Starting from cosmological initial conditions, we use the smoothed particle hydrodynamics code GADGET-2 to follow gas collapsing under the influence of a CR background up to densities of $n=10^{12}\\,{\\rm cm}^{-3}$, at which point we form sink particles. Using a suite of simulations with two sets of initial conditions and employing a range of CR background models, we follow each simulation for $5000\\,$yr after the first sink form","authors_text":"Athena Stacy, Jacob A. Hummel, Volker Bromm","cross_cats":["astro-ph.CO"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2016-02-22T21:00:00Z","title":"The First Stars: formation under cosmic ray feedback"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1602.06948","kind":"arxiv","version":1},"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:f13fabfbddfaa23901cb7992c1edd9d228e2eaf373c40721ffd65e23f0f10ef9","target":"record","created_at":"2026-05-18T01:10:31Z","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":"a03e2a61de45b89368250a844de71cd0e1429f38271f4cc8f158eade0946e91f","cross_cats_sorted":["astro-ph.CO"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2016-02-22T21:00:00Z","title_canon_sha256":"5378551052e338b9894c572f5f98eb0e1b127dbd83eaf61819249644e11202ad"},"schema_version":"1.0","source":{"id":"1602.06948","kind":"arxiv","version":1}},"canonical_sha256":"468497c5f8b806b4aa7ac2f1bf4b15a4c0eb41d44f5655f80f57a38c78fa4d5c","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"468497c5f8b806b4aa7ac2f1bf4b15a4c0eb41d44f5655f80f57a38c78fa4d5c","first_computed_at":"2026-05-18T01:10:31.006338Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:10:31.006338Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"GduqqxH8z5++U8XmgORaxxcaEbxrNXSbZm33c5AYYuy4U/ZghyW31ZIGj2ZzqnvjPB3m/IN3LW08gMA+pFcqBA==","signature_status":"signed_v1","signed_at":"2026-05-18T01:10:31.007138Z","signed_message":"canonical_sha256_bytes"},"source_id":"1602.06948","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:f13fabfbddfaa23901cb7992c1edd9d228e2eaf373c40721ffd65e23f0f10ef9","sha256:8ee334fc80bd23493a50516f6b3fa8bdd83f1633153867f3f04563d2e7ef13c9"],"state_sha256":"34e86b8eb60fc89bbb2a533a3cabe03daece26b3d89452eead06c6a5629fff0c"}