{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2026:IRPNOWBHYCPMYMQ77HLD6FZUE4","short_pith_number":"pith:IRPNOWBH","canonical_record":{"source":{"id":"2605.27508","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2026-05-26T18:00:02Z","cross_cats_sorted":["astro-ph.HE"],"title_canon_sha256":"71b2d3607c583dc701bbcbba93a785886c7f361ad07439569cdb395036ca81c0","abstract_canon_sha256":"ea36583780a339a67111c02789d0ba18e13bbe4e8f597282710f9f97c89955b3"},"schema_version":"1.0"},"canonical_sha256":"445ed75827c09ecc321ff9d63f1734270a86305833aea22940b32fe075876e30","source":{"kind":"arxiv","id":"2605.27508","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2605.27508","created_at":"2026-05-28T00:05:22Z"},{"alias_kind":"arxiv_version","alias_value":"2605.27508v1","created_at":"2026-05-28T00:05:22Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2605.27508","created_at":"2026-05-28T00:05:22Z"},{"alias_kind":"pith_short_12","alias_value":"IRPNOWBHYCPM","created_at":"2026-05-28T00:05:22Z"},{"alias_kind":"pith_short_16","alias_value":"IRPNOWBHYCPMYMQ7","created_at":"2026-05-28T00:05:22Z"},{"alias_kind":"pith_short_8","alias_value":"IRPNOWBH","created_at":"2026-05-28T00:05:22Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2026:IRPNOWBHYCPMYMQ77HLD6FZUE4","target":"record","payload":{"canonical_record":{"source":{"id":"2605.27508","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2026-05-26T18:00:02Z","cross_cats_sorted":["astro-ph.HE"],"title_canon_sha256":"71b2d3607c583dc701bbcbba93a785886c7f361ad07439569cdb395036ca81c0","abstract_canon_sha256":"ea36583780a339a67111c02789d0ba18e13bbe4e8f597282710f9f97c89955b3"},"schema_version":"1.0"},"canonical_sha256":"445ed75827c09ecc321ff9d63f1734270a86305833aea22940b32fe075876e30","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-28T00:05:22.030814Z","signature_b64":"lDnVkOKUW6Tvs1G84HHPap97x7AA7X/yxquSuxTQk1tvrl7Mg9aZVZtCzZJwQu876VW0yF5qu2AJbcHBaY7LDw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"445ed75827c09ecc321ff9d63f1734270a86305833aea22940b32fe075876e30","last_reissued_at":"2026-05-28T00:05:22.030262Z","signature_status":"signed_v1","first_computed_at":"2026-05-28T00:05:22.030262Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2605.27508","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":"2026-05-28T00:05:22Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"sWT0UEd8yjjE+XL70qmwW6priYXvrisIq6JjKVQxu+4Pk2RxLvk10kimuQ47egR5aPprvm029jgw5VpwdYwbBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-31T19:51:11.873204Z"},"content_sha256":"74dda0fcdb668b8c3cce6585822de752d6da4d1175c6814456c1686b4120ec78","schema_version":"1.0","event_id":"sha256:74dda0fcdb668b8c3cce6585822de752d6da4d1175c6814456c1686b4120ec78"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2026:IRPNOWBHYCPMYMQ77HLD6FZUE4","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"BlackHoleWeather -- Spin-coupled chaotic cold accretion across the meso scale: Variability and kinematics","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.HE"],"primary_cat":"astro-ph.GA","authors_text":"Ashkbiz Danehkar, Davide M. Brustio, Filippo Barbani, Filippo M. Maccagni, Francesco Salvestrini, Francesco Tombesi, Giovanni Stel, Massimo Gaspari, Olmo Piana, Pasquale Temi, Roberto Serafinelli, Valeria Olivares, Vieri Cammelli","submitted_at":"2026-05-26T18:00:02Z","abstract_excerpt":"Supermassive black hole (SMBH) spin records the vector history of accretion. In chaotic cold accretion (CCA), this history is set by clouds and filaments whose torques can add coherently, cancel, or reverse before reaching the horizon-scale closure. We test whether halo stirring regulates SMBH spin by changing the radial continuity and torque coherence of the meso-scale accretion bridge. We focus on spin evolution, jet-axis reorientation, accretion variability, and CCA kinematics. We analyse four 3D hydrodynamical simulations in a 100-kpc box, reaching sub-pc resolution, including SMBH spin-co"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2605.27508","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/2605.27508/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":"2026-05-28T00:05:22Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"25PRvxZMrgr7i6SSKzODmY+9hUtaX4gb4eXMAAvTsiFtbd0oDQntOTXLri4dOLWqXoOv15VUGgmVmkLQ6XJJAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-31T19:51:11.873893Z"},"content_sha256":"7608e234fc4b9bbc8643149d9b7d75d07559d3d59057eb613bacc4c39c56e24c","schema_version":"1.0","event_id":"sha256:7608e234fc4b9bbc8643149d9b7d75d07559d3d59057eb613bacc4c39c56e24c"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/IRPNOWBHYCPMYMQ77HLD6FZUE4/bundle.json","state_url":"https://pith.science/pith/IRPNOWBHYCPMYMQ77HLD6FZUE4/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/IRPNOWBHYCPMYMQ77HLD6FZUE4/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":"2026-05-31T19:51:11Z","links":{"resolver":"https://pith.science/pith/IRPNOWBHYCPMYMQ77HLD6FZUE4","bundle":"https://pith.science/pith/IRPNOWBHYCPMYMQ77HLD6FZUE4/bundle.json","state":"https://pith.science/pith/IRPNOWBHYCPMYMQ77HLD6FZUE4/state.json","well_known_bundle":"https://pith.science/.well-known/pith/IRPNOWBHYCPMYMQ77HLD6FZUE4/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2026:IRPNOWBHYCPMYMQ77HLD6FZUE4","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":"ea36583780a339a67111c02789d0ba18e13bbe4e8f597282710f9f97c89955b3","cross_cats_sorted":["astro-ph.HE"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2026-05-26T18:00:02Z","title_canon_sha256":"71b2d3607c583dc701bbcbba93a785886c7f361ad07439569cdb395036ca81c0"},"schema_version":"1.0","source":{"id":"2605.27508","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2605.27508","created_at":"2026-05-28T00:05:22Z"},{"alias_kind":"arxiv_version","alias_value":"2605.27508v1","created_at":"2026-05-28T00:05:22Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2605.27508","created_at":"2026-05-28T00:05:22Z"},{"alias_kind":"pith_short_12","alias_value":"IRPNOWBHYCPM","created_at":"2026-05-28T00:05:22Z"},{"alias_kind":"pith_short_16","alias_value":"IRPNOWBHYCPMYMQ7","created_at":"2026-05-28T00:05:22Z"},{"alias_kind":"pith_short_8","alias_value":"IRPNOWBH","created_at":"2026-05-28T00:05:22Z"}],"graph_snapshots":[{"event_id":"sha256:7608e234fc4b9bbc8643149d9b7d75d07559d3d59057eb613bacc4c39c56e24c","target":"graph","created_at":"2026-05-28T00:05:22Z","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/2605.27508/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Supermassive black hole (SMBH) spin records the vector history of accretion. In chaotic cold accretion (CCA), this history is set by clouds and filaments whose torques can add coherently, cancel, or reverse before reaching the horizon-scale closure. We test whether halo stirring regulates SMBH spin by changing the radial continuity and torque coherence of the meso-scale accretion bridge. We focus on spin evolution, jet-axis reorientation, accretion variability, and CCA kinematics. We analyse four 3D hydrodynamical simulations in a 100-kpc box, reaching sub-pc resolution, including SMBH spin-co","authors_text":"Ashkbiz Danehkar, Davide M. Brustio, Filippo Barbani, Filippo M. Maccagni, Francesco Salvestrini, Francesco Tombesi, Giovanni Stel, Massimo Gaspari, Olmo Piana, Pasquale Temi, Roberto Serafinelli, Valeria Olivares, Vieri Cammelli","cross_cats":["astro-ph.HE"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2026-05-26T18:00:02Z","title":"BlackHoleWeather -- Spin-coupled chaotic cold accretion across the meso scale: Variability and kinematics"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2605.27508","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":"sha256:74dda0fcdb668b8c3cce6585822de752d6da4d1175c6814456c1686b4120ec78","target":"record","created_at":"2026-05-28T00:05:22Z","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":"ea36583780a339a67111c02789d0ba18e13bbe4e8f597282710f9f97c89955b3","cross_cats_sorted":["astro-ph.HE"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2026-05-26T18:00:02Z","title_canon_sha256":"71b2d3607c583dc701bbcbba93a785886c7f361ad07439569cdb395036ca81c0"},"schema_version":"1.0","source":{"id":"2605.27508","kind":"arxiv","version":1}},"canonical_sha256":"445ed75827c09ecc321ff9d63f1734270a86305833aea22940b32fe075876e30","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"445ed75827c09ecc321ff9d63f1734270a86305833aea22940b32fe075876e30","first_computed_at":"2026-05-28T00:05:22.030262Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-28T00:05:22.030262Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"lDnVkOKUW6Tvs1G84HHPap97x7AA7X/yxquSuxTQk1tvrl7Mg9aZVZtCzZJwQu876VW0yF5qu2AJbcHBaY7LDw==","signature_status":"signed_v1","signed_at":"2026-05-28T00:05:22.030814Z","signed_message":"canonical_sha256_bytes"},"source_id":"2605.27508","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:74dda0fcdb668b8c3cce6585822de752d6da4d1175c6814456c1686b4120ec78","sha256:7608e234fc4b9bbc8643149d9b7d75d07559d3d59057eb613bacc4c39c56e24c"],"state_sha256":"2f6767e3933022b48e08aec94e0309b29e637db41b93303e6f9b1c25259a74b8"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"N2ykZLv/Am6dJUKPYzUxMS+wQbnOPDUS9dfIgkB9VUVslm4ZtamNZnwY8z/nnH5Spyg10GAmVV+BW+yowwEVDA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-31T19:51:11.877626Z","bundle_sha256":"3dc299351f5c8f34cc4272b77b904d79c63cf26d0539d6033da34dce05490bd0"}}