{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2013:IO5AX4ICT2J6PDKF7GDEG7RG33","short_pith_number":"pith:IO5AX4IC","canonical_record":{"source":{"id":"1305.0823","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2013-05-03T20:00:00Z","cross_cats_sorted":[],"title_canon_sha256":"e5de9825793c708d10977a24700b5a4b0d8a65824d03a2084dddf29b4521197e","abstract_canon_sha256":"3dc4b8155596796691698525990b4773432e8e7b8b70308acc15dd9afe26a522"},"schema_version":"1.0"},"canonical_sha256":"43ba0bf1029e93e78d45f986437e26defa6a2281be2abed190a3f6a8c8c7bbdf","source":{"kind":"arxiv","id":"1305.0823","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1305.0823","created_at":"2026-05-18T01:50:12Z"},{"alias_kind":"arxiv_version","alias_value":"1305.0823v2","created_at":"2026-05-18T01:50:12Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1305.0823","created_at":"2026-05-18T01:50:12Z"},{"alias_kind":"pith_short_12","alias_value":"IO5AX4ICT2J6","created_at":"2026-05-18T12:27:46Z"},{"alias_kind":"pith_short_16","alias_value":"IO5AX4ICT2J6PDKF","created_at":"2026-05-18T12:27:46Z"},{"alias_kind":"pith_short_8","alias_value":"IO5AX4IC","created_at":"2026-05-18T12:27:46Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2013:IO5AX4ICT2J6PDKF7GDEG7RG33","target":"record","payload":{"canonical_record":{"source":{"id":"1305.0823","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2013-05-03T20:00:00Z","cross_cats_sorted":[],"title_canon_sha256":"e5de9825793c708d10977a24700b5a4b0d8a65824d03a2084dddf29b4521197e","abstract_canon_sha256":"3dc4b8155596796691698525990b4773432e8e7b8b70308acc15dd9afe26a522"},"schema_version":"1.0"},"canonical_sha256":"43ba0bf1029e93e78d45f986437e26defa6a2281be2abed190a3f6a8c8c7bbdf","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:50:12.484802Z","signature_b64":"Q7dsCM63SXQWVafJEMJxLYLIl0MMEIXTRJA41aXNXJc4N78D+xoAr5ryGRAdF229s2Hzhb8+4e2BJfzpqDpaCg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"43ba0bf1029e93e78d45f986437e26defa6a2281be2abed190a3f6a8c8c7bbdf","last_reissued_at":"2026-05-18T01:50:12.484170Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:50:12.484170Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1305.0823","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T01:50:12Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"bwkFc/TLsZ52X05vIMRpABDq1PgcgHe9EdKD0/dRpNvmkKL0XNAc/tx731Nzcc3yKfVLAilAP0Z7ySXzb6GPAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-24T07:50:49.254756Z"},"content_sha256":"619510ed879be210699d01df21e488d10f21605e0198f32dbeae203421216afe","schema_version":"1.0","event_id":"sha256:619510ed879be210699d01df21e488d10f21605e0198f32dbeae203421216afe"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2013:IO5AX4ICT2J6PDKF7GDEG7RG33","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"On the operation of the chemothermal instability in primordial star-forming clouds","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.CO","authors_text":"Thomas H. Greif, Volker Bromm, Volker Springel","submitted_at":"2013-05-03T20:00:00Z","abstract_excerpt":"We investigate the operation of the chemothermal instability in primordial star-forming clouds with a suite of three-dimensional, moving-mesh simulations. In line with previous studies, we find that the gas at the centre of high-redshift minihaloes becomes chemothermally unstable as three-body reactions convert the atomic hydrogen into a fully molecular gas. The competition between the increasing rate at which the gas cools and the increasing optical depth to H2 line emission creates a characteristic dip in the cooling time over the free-fall time on a scale of 100 au. As a result, the free-fa"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1305.0823","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"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T01:50:12Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"SSnne6F51F+v03vrn1kqmnyI+P+fDTrCYL12tUt2W6TkhuwQQbkfHUy4/fxBPJGHBxjuFJPiCFhGOkG22RtyBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-24T07:50:49.255493Z"},"content_sha256":"500f7ab5c3ab746619df0bab17701252296569a17fb124e0000981ce7153b8ea","schema_version":"1.0","event_id":"sha256:500f7ab5c3ab746619df0bab17701252296569a17fb124e0000981ce7153b8ea"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/IO5AX4ICT2J6PDKF7GDEG7RG33/bundle.json","state_url":"https://pith.science/pith/IO5AX4ICT2J6PDKF7GDEG7RG33/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/IO5AX4ICT2J6PDKF7GDEG7RG33/bundle.json","status":"primary"}],"public_keys":[{"key_id":"pith-v1-2026-05","algorithm":"ed25519","format":"raw","public_key_b64":"stVStoiQhXFxp4s2pdzPNoqVNBMojDU/fJ2db5S3CbM=","public_key_hex":"b2d552b68890857171a78b36a5dccf368a953413288c353f7c9d9d6f94b709b3","fingerprint_sha256_b32_first128bits":"RVFV5Z2OI2J3ZUO7ERDEBCYNKS","fingerprint_sha256_hex":"8d4b5ee74e4693bcd1df2446408b0d54","rotates_at":null,"url":"https://pith.science/pith-signing-key.json","notes":"Pith uses this Ed25519 key to sign canonical record SHA-256 digests. Verify with: ed25519_verify(public_key, message=canonical_sha256_bytes, signature=base64decode(signature_b64))."}],"merge_version":"pith-open-graph-merge-v1","built_at":"2026-05-24T07:50:49Z","links":{"resolver":"https://pith.science/pith/IO5AX4ICT2J6PDKF7GDEG7RG33","bundle":"https://pith.science/pith/IO5AX4ICT2J6PDKF7GDEG7RG33/bundle.json","state":"https://pith.science/pith/IO5AX4ICT2J6PDKF7GDEG7RG33/state.json","well_known_bundle":"https://pith.science/.well-known/pith/IO5AX4ICT2J6PDKF7GDEG7RG33/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2013:IO5AX4ICT2J6PDKF7GDEG7RG33","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":"3dc4b8155596796691698525990b4773432e8e7b8b70308acc15dd9afe26a522","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2013-05-03T20:00:00Z","title_canon_sha256":"e5de9825793c708d10977a24700b5a4b0d8a65824d03a2084dddf29b4521197e"},"schema_version":"1.0","source":{"id":"1305.0823","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1305.0823","created_at":"2026-05-18T01:50:12Z"},{"alias_kind":"arxiv_version","alias_value":"1305.0823v2","created_at":"2026-05-18T01:50:12Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1305.0823","created_at":"2026-05-18T01:50:12Z"},{"alias_kind":"pith_short_12","alias_value":"IO5AX4ICT2J6","created_at":"2026-05-18T12:27:46Z"},{"alias_kind":"pith_short_16","alias_value":"IO5AX4ICT2J6PDKF","created_at":"2026-05-18T12:27:46Z"},{"alias_kind":"pith_short_8","alias_value":"IO5AX4IC","created_at":"2026-05-18T12:27:46Z"}],"graph_snapshots":[{"event_id":"sha256:500f7ab5c3ab746619df0bab17701252296569a17fb124e0000981ce7153b8ea","target":"graph","created_at":"2026-05-18T01:50:12Z","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 investigate the operation of the chemothermal instability in primordial star-forming clouds with a suite of three-dimensional, moving-mesh simulations. In line with previous studies, we find that the gas at the centre of high-redshift minihaloes becomes chemothermally unstable as three-body reactions convert the atomic hydrogen into a fully molecular gas. The competition between the increasing rate at which the gas cools and the increasing optical depth to H2 line emission creates a characteristic dip in the cooling time over the free-fall time on a scale of 100 au. As a result, the free-fa","authors_text":"Thomas H. Greif, Volker Bromm, Volker Springel","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2013-05-03T20:00:00Z","title":"On the operation of the chemothermal instability in primordial star-forming clouds"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1305.0823","kind":"arxiv","version":2},"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":"sha256:619510ed879be210699d01df21e488d10f21605e0198f32dbeae203421216afe","target":"record","created_at":"2026-05-18T01:50:12Z","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":"3dc4b8155596796691698525990b4773432e8e7b8b70308acc15dd9afe26a522","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2013-05-03T20:00:00Z","title_canon_sha256":"e5de9825793c708d10977a24700b5a4b0d8a65824d03a2084dddf29b4521197e"},"schema_version":"1.0","source":{"id":"1305.0823","kind":"arxiv","version":2}},"canonical_sha256":"43ba0bf1029e93e78d45f986437e26defa6a2281be2abed190a3f6a8c8c7bbdf","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"43ba0bf1029e93e78d45f986437e26defa6a2281be2abed190a3f6a8c8c7bbdf","first_computed_at":"2026-05-18T01:50:12.484170Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:50:12.484170Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"Q7dsCM63SXQWVafJEMJxLYLIl0MMEIXTRJA41aXNXJc4N78D+xoAr5ryGRAdF229s2Hzhb8+4e2BJfzpqDpaCg==","signature_status":"signed_v1","signed_at":"2026-05-18T01:50:12.484802Z","signed_message":"canonical_sha256_bytes"},"source_id":"1305.0823","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:619510ed879be210699d01df21e488d10f21605e0198f32dbeae203421216afe","sha256:500f7ab5c3ab746619df0bab17701252296569a17fb124e0000981ce7153b8ea"],"state_sha256":"3578c7c0c2c0cf42e2897f9472c58d6768a6b96f5157d6a93c866823fdc5790a"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"elA8xreY1Uw6WJ0mo84T+MJSAQfKzPsk0SrcjCq+iJcgw6+j9v0B/37m9+JbI9nYR82yXFzoUtTLTpQBc19RCg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-24T07:50:49.259649Z","bundle_sha256":"f6662ef0fbb6a506c0d4c0a83438750531f920493df0c209308658e29a4d8199"}}