{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2012:RBKCMPY7PKG6KNYUKLHK6IT756","short_pith_number":"pith:RBKCMPY7","canonical_record":{"source":{"id":"1212.2011","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2012-12-10T10:03:05Z","cross_cats_sorted":[],"title_canon_sha256":"09f11e31ab6eb6da0a6b0f5138996bbb88cdab389fbc418334cafb765d8937ba","abstract_canon_sha256":"76017baf04fe3d20c9039dc67af6f7cbdf60050ff54ecc4dcc29d2632d54f54b"},"schema_version":"1.0"},"canonical_sha256":"8854263f1f7a8de5371452ceaf227fefbcd01d30ff62dcb2f8c9873d5a80aa53","source":{"kind":"arxiv","id":"1212.2011","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1212.2011","created_at":"2026-05-18T01:52:46Z"},{"alias_kind":"arxiv_version","alias_value":"1212.2011v1","created_at":"2026-05-18T01:52:46Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1212.2011","created_at":"2026-05-18T01:52:46Z"},{"alias_kind":"pith_short_12","alias_value":"RBKCMPY7PKG6","created_at":"2026-05-18T12:27:20Z"},{"alias_kind":"pith_short_16","alias_value":"RBKCMPY7PKG6KNYU","created_at":"2026-05-18T12:27:20Z"},{"alias_kind":"pith_short_8","alias_value":"RBKCMPY7","created_at":"2026-05-18T12:27:20Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2012:RBKCMPY7PKG6KNYUKLHK6IT756","target":"record","payload":{"canonical_record":{"source":{"id":"1212.2011","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2012-12-10T10:03:05Z","cross_cats_sorted":[],"title_canon_sha256":"09f11e31ab6eb6da0a6b0f5138996bbb88cdab389fbc418334cafb765d8937ba","abstract_canon_sha256":"76017baf04fe3d20c9039dc67af6f7cbdf60050ff54ecc4dcc29d2632d54f54b"},"schema_version":"1.0"},"canonical_sha256":"8854263f1f7a8de5371452ceaf227fefbcd01d30ff62dcb2f8c9873d5a80aa53","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:52:46.028237Z","signature_b64":"HNGS5jJyEEh/tPC/K0oefOIyIq4Q65bMZDZ+mm3bZDUCeV55rms66DEQh5GwcCiRucxzub2nRAYUYBLoXiIbDQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"8854263f1f7a8de5371452ceaf227fefbcd01d30ff62dcb2f8c9873d5a80aa53","last_reissued_at":"2026-05-18T01:52:46.027844Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:52:46.027844Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1212.2011","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":"2026-05-18T01:52:46Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"gzT5a2sfwgn4nzxyMnHjkBA1yKstWkiJ2O4dshbrJ08hOdvElvNSm8/imRS3inIzGHS6FB4oBjFpc0+SBYcbDg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T14:20:13.504221Z"},"content_sha256":"25ca16025196a24a58660e454b450f901097ad8932cd05a55898d7aeb1c8f6df","schema_version":"1.0","event_id":"sha256:25ca16025196a24a58660e454b450f901097ad8932cd05a55898d7aeb1c8f6df"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2012:RBKCMPY7PKG6KNYUKLHK6IT756","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Ionizing feedback from massive stars in massive clusters III: Disruption of partially unbound clouds","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"B. Ercolano, I. A. Bonnell, J. E. Dale","submitted_at":"2012-12-10T10:03:05Z","abstract_excerpt":"We extend our previous SPH parameter study of the effects of photoionization from O-stars on star-forming clouds to include initially unbound clouds. We generate a set of model clouds in the mass range $10^{4}-10^{6}$M$_{\\odot}$ with initial virial ratios $E_{\\rm kin}/E_{\\rm pot}$=2.3, allow them to form stars, and study the impact of the photoionizing radiation produced by the massive stars. We find that, on the 3Myr timescale before supernovae are expected to begin detonating, the fractions of mass expelled by ionizing feedback is a very strong function of the cloud escape velocities. High-m"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1212.2011","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":""},"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":"2026-05-18T01:52:46Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"khVJ8DHHeJvM1m2t/gRm1KxOzAvbtZ465VUJ8zpH4XdlVLS/1NKdxZ0E/yE1jFn0g/CRO111fsx/+9zvq3tyDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T14:20:13.504949Z"},"content_sha256":"69cfd57140a84b6b45d652b6c122e76e0c0f65d2dbac1378113b88815a87f93c","schema_version":"1.0","event_id":"sha256:69cfd57140a84b6b45d652b6c122e76e0c0f65d2dbac1378113b88815a87f93c"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/RBKCMPY7PKG6KNYUKLHK6IT756/bundle.json","state_url":"https://pith.science/pith/RBKCMPY7PKG6KNYUKLHK6IT756/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/RBKCMPY7PKG6KNYUKLHK6IT756/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":"2026-05-27T14:20:13Z","links":{"resolver":"https://pith.science/pith/RBKCMPY7PKG6KNYUKLHK6IT756","bundle":"https://pith.science/pith/RBKCMPY7PKG6KNYUKLHK6IT756/bundle.json","state":"https://pith.science/pith/RBKCMPY7PKG6KNYUKLHK6IT756/state.json","well_known_bundle":"https://pith.science/.well-known/pith/RBKCMPY7PKG6KNYUKLHK6IT756/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2012:RBKCMPY7PKG6KNYUKLHK6IT756","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":"76017baf04fe3d20c9039dc67af6f7cbdf60050ff54ecc4dcc29d2632d54f54b","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2012-12-10T10:03:05Z","title_canon_sha256":"09f11e31ab6eb6da0a6b0f5138996bbb88cdab389fbc418334cafb765d8937ba"},"schema_version":"1.0","source":{"id":"1212.2011","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1212.2011","created_at":"2026-05-18T01:52:46Z"},{"alias_kind":"arxiv_version","alias_value":"1212.2011v1","created_at":"2026-05-18T01:52:46Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1212.2011","created_at":"2026-05-18T01:52:46Z"},{"alias_kind":"pith_short_12","alias_value":"RBKCMPY7PKG6","created_at":"2026-05-18T12:27:20Z"},{"alias_kind":"pith_short_16","alias_value":"RBKCMPY7PKG6KNYU","created_at":"2026-05-18T12:27:20Z"},{"alias_kind":"pith_short_8","alias_value":"RBKCMPY7","created_at":"2026-05-18T12:27:20Z"}],"graph_snapshots":[{"event_id":"sha256:69cfd57140a84b6b45d652b6c122e76e0c0f65d2dbac1378113b88815a87f93c","target":"graph","created_at":"2026-05-18T01:52:46Z","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 extend our previous SPH parameter study of the effects of photoionization from O-stars on star-forming clouds to include initially unbound clouds. We generate a set of model clouds in the mass range $10^{4}-10^{6}$M$_{\\odot}$ with initial virial ratios $E_{\\rm kin}/E_{\\rm pot}$=2.3, allow them to form stars, and study the impact of the photoionizing radiation produced by the massive stars. We find that, on the 3Myr timescale before supernovae are expected to begin detonating, the fractions of mass expelled by ionizing feedback is a very strong function of the cloud escape velocities. High-m","authors_text":"B. Ercolano, I. A. Bonnell, J. E. Dale","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2012-12-10T10:03:05Z","title":"Ionizing feedback from massive stars in massive clusters III: Disruption of partially unbound clouds"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1212.2011","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":"sha256:25ca16025196a24a58660e454b450f901097ad8932cd05a55898d7aeb1c8f6df","target":"record","created_at":"2026-05-18T01:52:46Z","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":"76017baf04fe3d20c9039dc67af6f7cbdf60050ff54ecc4dcc29d2632d54f54b","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2012-12-10T10:03:05Z","title_canon_sha256":"09f11e31ab6eb6da0a6b0f5138996bbb88cdab389fbc418334cafb765d8937ba"},"schema_version":"1.0","source":{"id":"1212.2011","kind":"arxiv","version":1}},"canonical_sha256":"8854263f1f7a8de5371452ceaf227fefbcd01d30ff62dcb2f8c9873d5a80aa53","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"8854263f1f7a8de5371452ceaf227fefbcd01d30ff62dcb2f8c9873d5a80aa53","first_computed_at":"2026-05-18T01:52:46.027844Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:52:46.027844Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"HNGS5jJyEEh/tPC/K0oefOIyIq4Q65bMZDZ+mm3bZDUCeV55rms66DEQh5GwcCiRucxzub2nRAYUYBLoXiIbDQ==","signature_status":"signed_v1","signed_at":"2026-05-18T01:52:46.028237Z","signed_message":"canonical_sha256_bytes"},"source_id":"1212.2011","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:25ca16025196a24a58660e454b450f901097ad8932cd05a55898d7aeb1c8f6df","sha256:69cfd57140a84b6b45d652b6c122e76e0c0f65d2dbac1378113b88815a87f93c"],"state_sha256":"be6cba5923bca831b4fc570794148de7627cc2cea22ec36df0e31782a14f2576"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"EukyJpSfXiaZv3SfCTck7Kj7DSWdHdvcqQ4YbzIZgxX+nHTI1hiS4HRWVdp8UnTiCiGWXEzU9OrBF2XxTQtJDw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-27T14:20:13.509645Z","bundle_sha256":"4b3d45c8d41605ff08bec8d233f233bd503cf9d4f036b0908e3e001444ad1fc6"}}