{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2017:4VGJZ6N7XV2LREUCYRLO2ZTRWQ","short_pith_number":"pith:4VGJZ6N7","canonical_record":{"source":{"id":"1701.06565","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2017-01-23T19:00:00Z","cross_cats_sorted":["astro-ph.CO","astro-ph.HE"],"title_canon_sha256":"0057879d21735ad7c046aa9745b57bb913baeb7dd413609300353a224bf18f73","abstract_canon_sha256":"157dbfeea3708b711c5981015d356dd056ad09e6a58ae45921e19956a3e9b8a5"},"schema_version":"1.0"},"canonical_sha256":"e54c9cf9bfbd74b89282c456ed6671b4161e29b92a6c4797df1962033b797d58","source":{"kind":"arxiv","id":"1701.06565","version":3},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1701.06565","created_at":"2026-05-18T00:50:37Z"},{"alias_kind":"arxiv_version","alias_value":"1701.06565v3","created_at":"2026-05-18T00:50:37Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1701.06565","created_at":"2026-05-18T00:50:37Z"},{"alias_kind":"pith_short_12","alias_value":"4VGJZ6N7XV2L","created_at":"2026-05-18T12:31:00Z"},{"alias_kind":"pith_short_16","alias_value":"4VGJZ6N7XV2LREUC","created_at":"2026-05-18T12:31:00Z"},{"alias_kind":"pith_short_8","alias_value":"4VGJZ6N7","created_at":"2026-05-18T12:31:00Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2017:4VGJZ6N7XV2LREUCYRLO2ZTRWQ","target":"record","payload":{"canonical_record":{"source":{"id":"1701.06565","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2017-01-23T19:00:00Z","cross_cats_sorted":["astro-ph.CO","astro-ph.HE"],"title_canon_sha256":"0057879d21735ad7c046aa9745b57bb913baeb7dd413609300353a224bf18f73","abstract_canon_sha256":"157dbfeea3708b711c5981015d356dd056ad09e6a58ae45921e19956a3e9b8a5"},"schema_version":"1.0"},"canonical_sha256":"e54c9cf9bfbd74b89282c456ed6671b4161e29b92a6c4797df1962033b797d58","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:50:37.361461Z","signature_b64":"9MpAleCTftqweLrfzECSMhZcyiOt+zwdnwVKqXFlV0ryChqZv5QhmZchcGM1roubcDcmh1a5jGG1LNwJ++PZAg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"e54c9cf9bfbd74b89282c456ed6671b4161e29b92a6c4797df1962033b797d58","last_reissued_at":"2026-05-18T00:50:37.360859Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:50:37.360859Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1701.06565","source_version":3,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T00:50:37Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"udgmt0luTzQsdihxJYBVISiT/ir0MOURDwVxWFC0aAaQKdtkBoUCwVr7xI4SA5h3GMEeEJ687Ou7+C9whyozDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-29T22:22:10.850163Z"},"content_sha256":"581e77503550bf4e0829640080d35559f4b6c88d50796bf8f8e28ca1e7392e1d","schema_version":"1.0","event_id":"sha256:581e77503550bf4e0829640080d35559f4b6c88d50796bf8f8e28ca1e7392e1d"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2017:4VGJZ6N7XV2LREUCYRLO2ZTRWQ","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Feedback Limits to Maximum Seed Masses of Black Holes","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.CO","astro-ph.HE"],"primary_cat":"astro-ph.GA","authors_text":"Andrea Ferrara, Fabio Pacucci, Priyamvada Natarajan","submitted_at":"2017-01-23T19:00:00Z","abstract_excerpt":"The most massive black holes observed in the Universe weigh up to $\\sim 10^{10} \\, \\mathrm{M_{\\odot}}$, nearly independent of redshift. Reaching these final masses likely required copious accretion and several major mergers. Employing a dynamical approach, that rests on the role played by a new, relevant physical scale - the transition radius - we provide a theoretical calculation of the maximum mass achievable by a black hole seed that forms in an isolated halo, one that scarcely merged. Incorporating effects at the transition radius and their impact on the evolution of accretion in isolated "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1701.06565","kind":"arxiv","version":3},"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":"2026-05-18T00:50:37Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"X3tpQFWxuNkfIF2ETFSsOYlmyYIgIxdsn1N2Z5zd353uYGhgj2r6b4SaVTu+uhq1BxAbUCk3OijB7Ukv5J3pCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-29T22:22:10.850875Z"},"content_sha256":"d14402059a2f0e8ae11def0c9e5db2a18566423d25dde0c8b769fa9994cb1ffe","schema_version":"1.0","event_id":"sha256:d14402059a2f0e8ae11def0c9e5db2a18566423d25dde0c8b769fa9994cb1ffe"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/4VGJZ6N7XV2LREUCYRLO2ZTRWQ/bundle.json","state_url":"https://pith.science/pith/4VGJZ6N7XV2LREUCYRLO2ZTRWQ/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/4VGJZ6N7XV2LREUCYRLO2ZTRWQ/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":"2026-05-29T22:22:10Z","links":{"resolver":"https://pith.science/pith/4VGJZ6N7XV2LREUCYRLO2ZTRWQ","bundle":"https://pith.science/pith/4VGJZ6N7XV2LREUCYRLO2ZTRWQ/bundle.json","state":"https://pith.science/pith/4VGJZ6N7XV2LREUCYRLO2ZTRWQ/state.json","well_known_bundle":"https://pith.science/.well-known/pith/4VGJZ6N7XV2LREUCYRLO2ZTRWQ/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2017:4VGJZ6N7XV2LREUCYRLO2ZTRWQ","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":"157dbfeea3708b711c5981015d356dd056ad09e6a58ae45921e19956a3e9b8a5","cross_cats_sorted":["astro-ph.CO","astro-ph.HE"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2017-01-23T19:00:00Z","title_canon_sha256":"0057879d21735ad7c046aa9745b57bb913baeb7dd413609300353a224bf18f73"},"schema_version":"1.0","source":{"id":"1701.06565","kind":"arxiv","version":3}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1701.06565","created_at":"2026-05-18T00:50:37Z"},{"alias_kind":"arxiv_version","alias_value":"1701.06565v3","created_at":"2026-05-18T00:50:37Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1701.06565","created_at":"2026-05-18T00:50:37Z"},{"alias_kind":"pith_short_12","alias_value":"4VGJZ6N7XV2L","created_at":"2026-05-18T12:31:00Z"},{"alias_kind":"pith_short_16","alias_value":"4VGJZ6N7XV2LREUC","created_at":"2026-05-18T12:31:00Z"},{"alias_kind":"pith_short_8","alias_value":"4VGJZ6N7","created_at":"2026-05-18T12:31:00Z"}],"graph_snapshots":[{"event_id":"sha256:d14402059a2f0e8ae11def0c9e5db2a18566423d25dde0c8b769fa9994cb1ffe","target":"graph","created_at":"2026-05-18T00:50:37Z","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":"The most massive black holes observed in the Universe weigh up to $\\sim 10^{10} \\, \\mathrm{M_{\\odot}}$, nearly independent of redshift. Reaching these final masses likely required copious accretion and several major mergers. Employing a dynamical approach, that rests on the role played by a new, relevant physical scale - the transition radius - we provide a theoretical calculation of the maximum mass achievable by a black hole seed that forms in an isolated halo, one that scarcely merged. Incorporating effects at the transition radius and their impact on the evolution of accretion in isolated ","authors_text":"Andrea Ferrara, Fabio Pacucci, Priyamvada Natarajan","cross_cats":["astro-ph.CO","astro-ph.HE"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2017-01-23T19:00:00Z","title":"Feedback Limits to Maximum Seed Masses of Black Holes"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1701.06565","kind":"arxiv","version":3},"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":"sha256:581e77503550bf4e0829640080d35559f4b6c88d50796bf8f8e28ca1e7392e1d","target":"record","created_at":"2026-05-18T00:50:37Z","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":"157dbfeea3708b711c5981015d356dd056ad09e6a58ae45921e19956a3e9b8a5","cross_cats_sorted":["astro-ph.CO","astro-ph.HE"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2017-01-23T19:00:00Z","title_canon_sha256":"0057879d21735ad7c046aa9745b57bb913baeb7dd413609300353a224bf18f73"},"schema_version":"1.0","source":{"id":"1701.06565","kind":"arxiv","version":3}},"canonical_sha256":"e54c9cf9bfbd74b89282c456ed6671b4161e29b92a6c4797df1962033b797d58","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"e54c9cf9bfbd74b89282c456ed6671b4161e29b92a6c4797df1962033b797d58","first_computed_at":"2026-05-18T00:50:37.360859Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:50:37.360859Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"9MpAleCTftqweLrfzECSMhZcyiOt+zwdnwVKqXFlV0ryChqZv5QhmZchcGM1roubcDcmh1a5jGG1LNwJ++PZAg==","signature_status":"signed_v1","signed_at":"2026-05-18T00:50:37.361461Z","signed_message":"canonical_sha256_bytes"},"source_id":"1701.06565","source_kind":"arxiv","source_version":3}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:581e77503550bf4e0829640080d35559f4b6c88d50796bf8f8e28ca1e7392e1d","sha256:d14402059a2f0e8ae11def0c9e5db2a18566423d25dde0c8b769fa9994cb1ffe"],"state_sha256":"868930d8ad3e3409d994d7db25f9c0d17e082c995be9dc51adbf2e062d08ef4d"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"qdirfgDo0HdZQ1nT61l+S9C4gBlgjOdZY7qCNnCgYn/JIQmNqP3urmmxpc1EXWlHxPN8FKulJvtlNk5/oVM+Bg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-29T22:22:10.854542Z","bundle_sha256":"914832fee8382b4c22963fdef1149cf04892f047d4c8db407c168ce131099aa5"}}