{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2015:WNRNMX6S4J3EDG23DTDLJFJTZO","short_pith_number":"pith:WNRNMX6S","canonical_record":{"source":{"id":"1509.07034","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2015-09-23T15:37:05Z","cross_cats_sorted":["astro-ph.CO"],"title_canon_sha256":"c97cee6d4fbbe5870fafca71176439aa71216e33e9b339936d025e045d422e70","abstract_canon_sha256":"a50d36f90a264cdfc01f02bb18a081e9ca3f33da12d99e108a90618c08bfad26"},"schema_version":"1.0"},"canonical_sha256":"b362d65fd2e276419b5b1cc6b49533cb8854478413d939afd83f65d1a2d4b136","source":{"kind":"arxiv","id":"1509.07034","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1509.07034","created_at":"2026-05-18T01:13:16Z"},{"alias_kind":"arxiv_version","alias_value":"1509.07034v2","created_at":"2026-05-18T01:13:16Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1509.07034","created_at":"2026-05-18T01:13:16Z"},{"alias_kind":"pith_short_12","alias_value":"WNRNMX6S4J3E","created_at":"2026-05-18T12:29:47Z"},{"alias_kind":"pith_short_16","alias_value":"WNRNMX6S4J3EDG23","created_at":"2026-05-18T12:29:47Z"},{"alias_kind":"pith_short_8","alias_value":"WNRNMX6S","created_at":"2026-05-18T12:29:47Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2015:WNRNMX6S4J3EDG23DTDLJFJTZO","target":"record","payload":{"canonical_record":{"source":{"id":"1509.07034","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2015-09-23T15:37:05Z","cross_cats_sorted":["astro-ph.CO"],"title_canon_sha256":"c97cee6d4fbbe5870fafca71176439aa71216e33e9b339936d025e045d422e70","abstract_canon_sha256":"a50d36f90a264cdfc01f02bb18a081e9ca3f33da12d99e108a90618c08bfad26"},"schema_version":"1.0"},"canonical_sha256":"b362d65fd2e276419b5b1cc6b49533cb8854478413d939afd83f65d1a2d4b136","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:13:16.575385Z","signature_b64":"HKbt5IZdSIdPCTnrtDZAa0sJlYtV4oOQ+2FVyCKFwBoTRfaf1Falu7nq7yOCqvhEinwfuyF3YZOCqi1meJ6ODA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"b362d65fd2e276419b5b1cc6b49533cb8854478413d939afd83f65d1a2d4b136","last_reissued_at":"2026-05-18T01:13:16.574955Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:13:16.574955Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1509.07034","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":"2026-05-18T01:13:16Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"V4MWbSco53SHdnBzv74k3+WJFW/eOc5Svn20iZJQEkMUdWZzKgLy5sXnFnYYMWVD5JwW3jssTmnIM1ZJRk5qBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-04T14:29:43.356770Z"},"content_sha256":"1c95db8210c448c144417faeb5bef6be05fa43ee256b8cf19ff6fdd7d186ae56","schema_version":"1.0","event_id":"sha256:1c95db8210c448c144417faeb5bef6be05fa43ee256b8cf19ff6fdd7d186ae56"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2015:WNRNMX6S4J3EDG23DTDLJFJTZO","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Impact of dust cooling on direct collapse black hole formation","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.CO"],"primary_cat":"astro-ph.GA","authors_text":"D.R.G. Schleicher, K. Omukai, M.A. Latif, M. Habouzit, M. Volonteri","submitted_at":"2015-09-23T15:37:05Z","abstract_excerpt":"Observations of quasars at $ z > 6$ suggest the presence of black holes with a few times $\\rm 10^9 ~M_{\\odot}$. Numerous models have been proposed to explain their existence including the direct collapse which provides massive seeds of $\\rm 10^5~M_{\\odot}$. The isothermal direct collapse requires a strong Lyman-Werner flux to quench $\\rm H_2$ formation in massive primordial halos. In this study, we explore the impact of trace amounts of metals and dust enrichment. We perform three dimensional cosmological simulations for two halos of $\\rm > 10^7~M_{\\odot}$ with $\\rm Z/Z_{\\odot}= 10^{-4}-10^{-6"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1509.07034","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":"2026-05-18T01:13:16Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"n5/m9lgY2a7OOYJZB4eSqJAfo6QEjSS/Z9rFu3Fl6g1iljkufAvpNwwHIpaA7DaMRvzQIlniNrLlBsWKNqIxBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-04T14:29:43.357175Z"},"content_sha256":"d4d2e0fe42d2a137cd43561d00ba51cfe9c85dfa3454879fac892f68e7484721","schema_version":"1.0","event_id":"sha256:d4d2e0fe42d2a137cd43561d00ba51cfe9c85dfa3454879fac892f68e7484721"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/WNRNMX6S4J3EDG23DTDLJFJTZO/bundle.json","state_url":"https://pith.science/pith/WNRNMX6S4J3EDG23DTDLJFJTZO/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/WNRNMX6S4J3EDG23DTDLJFJTZO/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":"2026-06-04T14:29:43Z","links":{"resolver":"https://pith.science/pith/WNRNMX6S4J3EDG23DTDLJFJTZO","bundle":"https://pith.science/pith/WNRNMX6S4J3EDG23DTDLJFJTZO/bundle.json","state":"https://pith.science/pith/WNRNMX6S4J3EDG23DTDLJFJTZO/state.json","well_known_bundle":"https://pith.science/.well-known/pith/WNRNMX6S4J3EDG23DTDLJFJTZO/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:WNRNMX6S4J3EDG23DTDLJFJTZO","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":"a50d36f90a264cdfc01f02bb18a081e9ca3f33da12d99e108a90618c08bfad26","cross_cats_sorted":["astro-ph.CO"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2015-09-23T15:37:05Z","title_canon_sha256":"c97cee6d4fbbe5870fafca71176439aa71216e33e9b339936d025e045d422e70"},"schema_version":"1.0","source":{"id":"1509.07034","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1509.07034","created_at":"2026-05-18T01:13:16Z"},{"alias_kind":"arxiv_version","alias_value":"1509.07034v2","created_at":"2026-05-18T01:13:16Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1509.07034","created_at":"2026-05-18T01:13:16Z"},{"alias_kind":"pith_short_12","alias_value":"WNRNMX6S4J3E","created_at":"2026-05-18T12:29:47Z"},{"alias_kind":"pith_short_16","alias_value":"WNRNMX6S4J3EDG23","created_at":"2026-05-18T12:29:47Z"},{"alias_kind":"pith_short_8","alias_value":"WNRNMX6S","created_at":"2026-05-18T12:29:47Z"}],"graph_snapshots":[{"event_id":"sha256:d4d2e0fe42d2a137cd43561d00ba51cfe9c85dfa3454879fac892f68e7484721","target":"graph","created_at":"2026-05-18T01:13:16Z","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":"Observations of quasars at $ z > 6$ suggest the presence of black holes with a few times $\\rm 10^9 ~M_{\\odot}$. Numerous models have been proposed to explain their existence including the direct collapse which provides massive seeds of $\\rm 10^5~M_{\\odot}$. The isothermal direct collapse requires a strong Lyman-Werner flux to quench $\\rm H_2$ formation in massive primordial halos. In this study, we explore the impact of trace amounts of metals and dust enrichment. We perform three dimensional cosmological simulations for two halos of $\\rm > 10^7~M_{\\odot}$ with $\\rm Z/Z_{\\odot}= 10^{-4}-10^{-6","authors_text":"D.R.G. Schleicher, K. Omukai, M.A. Latif, M. Habouzit, M. Volonteri","cross_cats":["astro-ph.CO"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2015-09-23T15:37:05Z","title":"Impact of dust cooling on direct collapse black hole formation"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1509.07034","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":"sha256:1c95db8210c448c144417faeb5bef6be05fa43ee256b8cf19ff6fdd7d186ae56","target":"record","created_at":"2026-05-18T01:13:16Z","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":"a50d36f90a264cdfc01f02bb18a081e9ca3f33da12d99e108a90618c08bfad26","cross_cats_sorted":["astro-ph.CO"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2015-09-23T15:37:05Z","title_canon_sha256":"c97cee6d4fbbe5870fafca71176439aa71216e33e9b339936d025e045d422e70"},"schema_version":"1.0","source":{"id":"1509.07034","kind":"arxiv","version":2}},"canonical_sha256":"b362d65fd2e276419b5b1cc6b49533cb8854478413d939afd83f65d1a2d4b136","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"b362d65fd2e276419b5b1cc6b49533cb8854478413d939afd83f65d1a2d4b136","first_computed_at":"2026-05-18T01:13:16.574955Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:13:16.574955Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"HKbt5IZdSIdPCTnrtDZAa0sJlYtV4oOQ+2FVyCKFwBoTRfaf1Falu7nq7yOCqvhEinwfuyF3YZOCqi1meJ6ODA==","signature_status":"signed_v1","signed_at":"2026-05-18T01:13:16.575385Z","signed_message":"canonical_sha256_bytes"},"source_id":"1509.07034","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:1c95db8210c448c144417faeb5bef6be05fa43ee256b8cf19ff6fdd7d186ae56","sha256:d4d2e0fe42d2a137cd43561d00ba51cfe9c85dfa3454879fac892f68e7484721"],"state_sha256":"c81d82685bb2e6125f1cf0490f81b085027aa3f91f121f6f8d3dfd4014a33746"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"0uFQXjGU+kZ0Q1oJLONR4Fe4GeO8mzCTWfVV6uItTDTV0nJlFRx0fYpspzDwTfjkzn+ohtFJRsg6IS8GRvIXAg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-04T14:29:43.359517Z","bundle_sha256":"605d00930c94db3681e614fa09876a4db1ca34672ad124a7f20a47a9061dcb3f"}}