{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2021:BXDH7YUL6XEB7N4UBOHEQ3SNBJ","short_pith_number":"pith:BXDH7YUL","canonical_record":{"source":{"id":"2107.03395","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.CO","submitted_at":"2021-07-07T18:00:02Z","cross_cats_sorted":[],"title_canon_sha256":"201eec7c00fcb724e85b997f5ad968d49d6e7819e437e20d6750acf01f43aa9a","abstract_canon_sha256":"5688c828b2e4ef1d3c85e6700bceeb0b5311d9cffefea8c337077e11465e0a8c"},"schema_version":"1.0"},"canonical_sha256":"0dc67fe28bf5c81fb7940b8e486e4d0a6e8e94cca29aac432a65e9f774edb238","source":{"kind":"arxiv","id":"2107.03395","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2107.03395","created_at":"2026-07-05T03:42:44Z"},{"alias_kind":"arxiv_version","alias_value":"2107.03395v1","created_at":"2026-07-05T03:42:44Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2107.03395","created_at":"2026-07-05T03:42:44Z"},{"alias_kind":"pith_short_12","alias_value":"BXDH7YUL6XEB","created_at":"2026-07-05T03:42:44Z"},{"alias_kind":"pith_short_16","alias_value":"BXDH7YUL6XEB7N4U","created_at":"2026-07-05T03:42:44Z"},{"alias_kind":"pith_short_8","alias_value":"BXDH7YUL","created_at":"2026-07-05T03:42:44Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2021:BXDH7YUL6XEB7N4UBOHEQ3SNBJ","target":"record","payload":{"canonical_record":{"source":{"id":"2107.03395","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.CO","submitted_at":"2021-07-07T18:00:02Z","cross_cats_sorted":[],"title_canon_sha256":"201eec7c00fcb724e85b997f5ad968d49d6e7819e437e20d6750acf01f43aa9a","abstract_canon_sha256":"5688c828b2e4ef1d3c85e6700bceeb0b5311d9cffefea8c337077e11465e0a8c"},"schema_version":"1.0"},"canonical_sha256":"0dc67fe28bf5c81fb7940b8e486e4d0a6e8e94cca29aac432a65e9f774edb238","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T03:42:44.053545Z","signature_b64":"QOjU1FqR8FDU+pGdKP2XU+Xacak0X0qMYGVd1B7NVPq5mUJmMSGO46sCDXp3d0X7zuplifQZTH/oNbQnYuOdCA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"0dc67fe28bf5c81fb7940b8e486e4d0a6e8e94cca29aac432a65e9f774edb238","last_reissued_at":"2026-07-05T03:42:44.053130Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T03:42:44.053130Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2107.03395","source_version":1,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T03:42:44Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"3obx5A1PFxZaaY5bnFksFVnNTEaL1Bdlve1j+oQjBGbWIYQAPmxliKVtLAyI51X+SISLmnIAJyxgsMtLnQkWBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-19T02:31:11.043595Z"},"content_sha256":"0ee327ea509ebdb62cee5642cdf88e572dc6a0e7593b08b0f71d9e4dd35e76ad","schema_version":"1.0","event_id":"sha256:0ee327ea509ebdb62cee5642cdf88e572dc6a0e7593b08b0f71d9e4dd35e76ad"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2021:BXDH7YUL6XEB7N4UBOHEQ3SNBJ","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Thermal Instabilities and Shattering in the High-Redshift WHIM: Convergence Criteria and Implications for Low-Metallicity Strong HI Absorbers","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.CO","authors_text":"Daisuke Nagai, Frank C. van den Bosch, Freeke van de Voort, Iryna S. Butsky, Joseph N. Burchett, Nir Mandelker, S. Peng Oh, Volker Springel","submitted_at":"2021-07-07T18:00:02Z","abstract_excerpt":"Using a novel suite of cosmological simulations zooming in on a Mpc-scale intergalactic sheet or \"pancake\" at z~3-5, we conduct an in-depth study of the thermal properties and HI content of the warm-hot intergalactic medium (WHIM) at those redshifts. The simulations span nearly three orders of magnitude in gas-cell mass, from ~(7.7x10^6-1.5x10^4)Msun, one of the highest resolution simulations of such a large patch of the inter-galactic medium (IGM) to date. At z~5, a strong accretion shock develops around the main pancake following a collision between two smaller sheets. Gas in the post-shock "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2107.03395","kind":"arxiv","version":1},"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/2107.03395/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"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T03:42:44Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"jj2AQP5WbICg/Q5ZuKDpniyr85uNdwsH/CpMg/FWQ7VfvK2l38gHH2V1aNsA0nC/t/yrap1niw7Lg86D9NHqDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-19T02:31:11.043951Z"},"content_sha256":"8c634d62ea5a0ff68d21f5e88491821eb689a854c65522a79d0c522e11fe6cad","schema_version":"1.0","event_id":"sha256:8c634d62ea5a0ff68d21f5e88491821eb689a854c65522a79d0c522e11fe6cad"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/BXDH7YUL6XEB7N4UBOHEQ3SNBJ/bundle.json","state_url":"https://pith.science/pith/BXDH7YUL6XEB7N4UBOHEQ3SNBJ/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/BXDH7YUL6XEB7N4UBOHEQ3SNBJ/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":"2026-07-19T02:31:11Z","links":{"resolver":"https://pith.science/pith/BXDH7YUL6XEB7N4UBOHEQ3SNBJ","bundle":"https://pith.science/pith/BXDH7YUL6XEB7N4UBOHEQ3SNBJ/bundle.json","state":"https://pith.science/pith/BXDH7YUL6XEB7N4UBOHEQ3SNBJ/state.json","well_known_bundle":"https://pith.science/.well-known/pith/BXDH7YUL6XEB7N4UBOHEQ3SNBJ/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2021:BXDH7YUL6XEB7N4UBOHEQ3SNBJ","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":"5688c828b2e4ef1d3c85e6700bceeb0b5311d9cffefea8c337077e11465e0a8c","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.CO","submitted_at":"2021-07-07T18:00:02Z","title_canon_sha256":"201eec7c00fcb724e85b997f5ad968d49d6e7819e437e20d6750acf01f43aa9a"},"schema_version":"1.0","source":{"id":"2107.03395","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2107.03395","created_at":"2026-07-05T03:42:44Z"},{"alias_kind":"arxiv_version","alias_value":"2107.03395v1","created_at":"2026-07-05T03:42:44Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2107.03395","created_at":"2026-07-05T03:42:44Z"},{"alias_kind":"pith_short_12","alias_value":"BXDH7YUL6XEB","created_at":"2026-07-05T03:42:44Z"},{"alias_kind":"pith_short_16","alias_value":"BXDH7YUL6XEB7N4U","created_at":"2026-07-05T03:42:44Z"},{"alias_kind":"pith_short_8","alias_value":"BXDH7YUL","created_at":"2026-07-05T03:42:44Z"}],"graph_snapshots":[{"event_id":"sha256:8c634d62ea5a0ff68d21f5e88491821eb689a854c65522a79d0c522e11fe6cad","target":"graph","created_at":"2026-07-05T03:42:44Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/2107.03395/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Using a novel suite of cosmological simulations zooming in on a Mpc-scale intergalactic sheet or \"pancake\" at z~3-5, we conduct an in-depth study of the thermal properties and HI content of the warm-hot intergalactic medium (WHIM) at those redshifts. The simulations span nearly three orders of magnitude in gas-cell mass, from ~(7.7x10^6-1.5x10^4)Msun, one of the highest resolution simulations of such a large patch of the inter-galactic medium (IGM) to date. At z~5, a strong accretion shock develops around the main pancake following a collision between two smaller sheets. Gas in the post-shock ","authors_text":"Daisuke Nagai, Frank C. van den Bosch, Freeke van de Voort, Iryna S. Butsky, Joseph N. Burchett, Nir Mandelker, S. Peng Oh, Volker Springel","cross_cats":[],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.CO","submitted_at":"2021-07-07T18:00:02Z","title":"Thermal Instabilities and Shattering in the High-Redshift WHIM: Convergence Criteria and Implications for Low-Metallicity Strong HI Absorbers"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2107.03395","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":"sha256:0ee327ea509ebdb62cee5642cdf88e572dc6a0e7593b08b0f71d9e4dd35e76ad","target":"record","created_at":"2026-07-05T03:42:44Z","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":"5688c828b2e4ef1d3c85e6700bceeb0b5311d9cffefea8c337077e11465e0a8c","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.CO","submitted_at":"2021-07-07T18:00:02Z","title_canon_sha256":"201eec7c00fcb724e85b997f5ad968d49d6e7819e437e20d6750acf01f43aa9a"},"schema_version":"1.0","source":{"id":"2107.03395","kind":"arxiv","version":1}},"canonical_sha256":"0dc67fe28bf5c81fb7940b8e486e4d0a6e8e94cca29aac432a65e9f774edb238","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"0dc67fe28bf5c81fb7940b8e486e4d0a6e8e94cca29aac432a65e9f774edb238","first_computed_at":"2026-07-05T03:42:44.053130Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T03:42:44.053130Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"QOjU1FqR8FDU+pGdKP2XU+Xacak0X0qMYGVd1B7NVPq5mUJmMSGO46sCDXp3d0X7zuplifQZTH/oNbQnYuOdCA==","signature_status":"signed_v1","signed_at":"2026-07-05T03:42:44.053545Z","signed_message":"canonical_sha256_bytes"},"source_id":"2107.03395","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:0ee327ea509ebdb62cee5642cdf88e572dc6a0e7593b08b0f71d9e4dd35e76ad","sha256:8c634d62ea5a0ff68d21f5e88491821eb689a854c65522a79d0c522e11fe6cad"],"state_sha256":"18c5bff67714c5cc7b0fb633e324eb2d8926dad6ba0d65825cdfec4a9eaab190"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"NZJizz5rNl/nZOxmmfOTG+M8oXEYYmXN837DxAyWaaKT+PegIcmev65RTj2eOJkgsMRaA0Vx3iyrpBqW8U+jDg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-19T02:31:11.045965Z","bundle_sha256":"a33e74ecee756a6de4e4474792acf210229299d9d90c98da615a39b065514797"}}