{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2012:HEOI4FJFO4FIN7AC5TQDFIY7TY","short_pith_number":"pith:HEOI4FJF","canonical_record":{"source":{"id":"1203.0810","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2012-03-05T03:46:18Z","cross_cats_sorted":["astro-ph.GA"],"title_canon_sha256":"6ec0de6a5a8479ad6b494f8ce63db019e3616473fc33e5ca120069b603475f3f","abstract_canon_sha256":"d3ccf9b7b5b2b8593ee93796a2fd56ab992fe4c64ed8a971e3870037ead565fb"},"schema_version":"1.0"},"canonical_sha256":"391c8e1525770a86fc02ece032a31f9e052799c80777ff625787938f496b6ed0","source":{"kind":"arxiv","id":"1203.0810","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1203.0810","created_at":"2026-05-18T01:58:15Z"},{"alias_kind":"arxiv_version","alias_value":"1203.0810v2","created_at":"2026-05-18T01:58:15Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1203.0810","created_at":"2026-05-18T01:58:15Z"},{"alias_kind":"pith_short_12","alias_value":"HEOI4FJFO4FI","created_at":"2026-05-18T12:27:09Z"},{"alias_kind":"pith_short_16","alias_value":"HEOI4FJFO4FIN7AC","created_at":"2026-05-18T12:27:09Z"},{"alias_kind":"pith_short_8","alias_value":"HEOI4FJF","created_at":"2026-05-18T12:27:09Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2012:HEOI4FJFO4FIN7AC5TQDFIY7TY","target":"record","payload":{"canonical_record":{"source":{"id":"1203.0810","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2012-03-05T03:46:18Z","cross_cats_sorted":["astro-ph.GA"],"title_canon_sha256":"6ec0de6a5a8479ad6b494f8ce63db019e3616473fc33e5ca120069b603475f3f","abstract_canon_sha256":"d3ccf9b7b5b2b8593ee93796a2fd56ab992fe4c64ed8a971e3870037ead565fb"},"schema_version":"1.0"},"canonical_sha256":"391c8e1525770a86fc02ece032a31f9e052799c80777ff625787938f496b6ed0","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:58:15.080909Z","signature_b64":"lQDHTmGqaThj9Fllu1qzkJBnTmm2iwsySerYR49uq2Wj8C/pkkknz2Tz8Dqwu9VItB3djvs6fdR9nsyQBCMvAg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"391c8e1525770a86fc02ece032a31f9e052799c80777ff625787938f496b6ed0","last_reissued_at":"2026-05-18T01:58:15.080243Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:58:15.080243Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1203.0810","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":"2026-05-18T01:58:15Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"VkNo1eeGUcWqRz/n9nZobLV7n0OqRBtFOH4WvwH9BFaMZaQ6KD2TDBusxSY8dCWZas12UMA/4W5BSMeadA9HDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-30T07:18:17.275656Z"},"content_sha256":"277d4562b3b09b0c225a7c47d8cc6dd7744e446d30309ae5b2be95cdfbff5c66","schema_version":"1.0","event_id":"sha256:277d4562b3b09b0c225a7c47d8cc6dd7744e446d30309ae5b2be95cdfbff5c66"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2012:HEOI4FJFO4FIN7AC5TQDFIY7TY","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"On the effect of cosmological inflow on turbulence and instability in galactic discs","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.GA"],"primary_cat":"astro-ph.CO","authors_text":"Avishai Dekel, Marcello Cacciato, Shy Genel","submitted_at":"2012-03-05T03:46:18Z","abstract_excerpt":"We analyse the evolution of turbulence and gravitational instability of a galactic disc in a quasi-steady state governed by cosmological inflow. We focus on the possibility that the coupling between the in-streaming gas and the disc is maximal, e.g., via dense clumps, and ask whether the streams could be the driver of turbulence in an unstable disc with a Toomre parameter Q~1. Our fiducial model assumes an efficiency of ~0.5 per dynamical time for the decay of turbulence energy, and ~0.02 for each of the processes that deplete the disc gas, i.e., star formation, outflow, and inflow within the "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1203.0810","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":"2026-05-18T01:58:15Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"0/X2FB2z+2uPdhNbqxnBMtptxHEAt7tZ8NfiaOwH1y0IPxZq6wgJxdVD/0T3AwrB44Q5ummdd8XREQt4woZ4Cg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-30T07:18:17.276010Z"},"content_sha256":"c9091aa55d2861a8ac9b0a2310d2cc831adfe21e4dbe041b5baaf85d6463d8f5","schema_version":"1.0","event_id":"sha256:c9091aa55d2861a8ac9b0a2310d2cc831adfe21e4dbe041b5baaf85d6463d8f5"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/HEOI4FJFO4FIN7AC5TQDFIY7TY/bundle.json","state_url":"https://pith.science/pith/HEOI4FJFO4FIN7AC5TQDFIY7TY/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/HEOI4FJFO4FIN7AC5TQDFIY7TY/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":"2026-05-30T07:18:17Z","links":{"resolver":"https://pith.science/pith/HEOI4FJFO4FIN7AC5TQDFIY7TY","bundle":"https://pith.science/pith/HEOI4FJFO4FIN7AC5TQDFIY7TY/bundle.json","state":"https://pith.science/pith/HEOI4FJFO4FIN7AC5TQDFIY7TY/state.json","well_known_bundle":"https://pith.science/.well-known/pith/HEOI4FJFO4FIN7AC5TQDFIY7TY/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2012:HEOI4FJFO4FIN7AC5TQDFIY7TY","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":"d3ccf9b7b5b2b8593ee93796a2fd56ab992fe4c64ed8a971e3870037ead565fb","cross_cats_sorted":["astro-ph.GA"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2012-03-05T03:46:18Z","title_canon_sha256":"6ec0de6a5a8479ad6b494f8ce63db019e3616473fc33e5ca120069b603475f3f"},"schema_version":"1.0","source":{"id":"1203.0810","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1203.0810","created_at":"2026-05-18T01:58:15Z"},{"alias_kind":"arxiv_version","alias_value":"1203.0810v2","created_at":"2026-05-18T01:58:15Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1203.0810","created_at":"2026-05-18T01:58:15Z"},{"alias_kind":"pith_short_12","alias_value":"HEOI4FJFO4FI","created_at":"2026-05-18T12:27:09Z"},{"alias_kind":"pith_short_16","alias_value":"HEOI4FJFO4FIN7AC","created_at":"2026-05-18T12:27:09Z"},{"alias_kind":"pith_short_8","alias_value":"HEOI4FJF","created_at":"2026-05-18T12:27:09Z"}],"graph_snapshots":[{"event_id":"sha256:c9091aa55d2861a8ac9b0a2310d2cc831adfe21e4dbe041b5baaf85d6463d8f5","target":"graph","created_at":"2026-05-18T01:58:15Z","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 analyse the evolution of turbulence and gravitational instability of a galactic disc in a quasi-steady state governed by cosmological inflow. We focus on the possibility that the coupling between the in-streaming gas and the disc is maximal, e.g., via dense clumps, and ask whether the streams could be the driver of turbulence in an unstable disc with a Toomre parameter Q~1. Our fiducial model assumes an efficiency of ~0.5 per dynamical time for the decay of turbulence energy, and ~0.02 for each of the processes that deplete the disc gas, i.e., star formation, outflow, and inflow within the ","authors_text":"Avishai Dekel, Marcello Cacciato, Shy Genel","cross_cats":["astro-ph.GA"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2012-03-05T03:46:18Z","title":"On the effect of cosmological inflow on turbulence and instability in galactic discs"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1203.0810","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":"sha256:277d4562b3b09b0c225a7c47d8cc6dd7744e446d30309ae5b2be95cdfbff5c66","target":"record","created_at":"2026-05-18T01:58:15Z","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":"d3ccf9b7b5b2b8593ee93796a2fd56ab992fe4c64ed8a971e3870037ead565fb","cross_cats_sorted":["astro-ph.GA"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2012-03-05T03:46:18Z","title_canon_sha256":"6ec0de6a5a8479ad6b494f8ce63db019e3616473fc33e5ca120069b603475f3f"},"schema_version":"1.0","source":{"id":"1203.0810","kind":"arxiv","version":2}},"canonical_sha256":"391c8e1525770a86fc02ece032a31f9e052799c80777ff625787938f496b6ed0","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"391c8e1525770a86fc02ece032a31f9e052799c80777ff625787938f496b6ed0","first_computed_at":"2026-05-18T01:58:15.080243Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:58:15.080243Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"lQDHTmGqaThj9Fllu1qzkJBnTmm2iwsySerYR49uq2Wj8C/pkkknz2Tz8Dqwu9VItB3djvs6fdR9nsyQBCMvAg==","signature_status":"signed_v1","signed_at":"2026-05-18T01:58:15.080909Z","signed_message":"canonical_sha256_bytes"},"source_id":"1203.0810","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:277d4562b3b09b0c225a7c47d8cc6dd7744e446d30309ae5b2be95cdfbff5c66","sha256:c9091aa55d2861a8ac9b0a2310d2cc831adfe21e4dbe041b5baaf85d6463d8f5"],"state_sha256":"2f1d0f57d67b06221594905c28bd59589b853ee70f80a99c3642117a68d87070"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"/SV73dzTD1tWIJFlUl8osTQ8seyIpy53Bbuhwp9Ybyny8ogEv++T+0D6pvKaKPGNy1uG5Prcgt25ouyNbsccBw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-30T07:18:17.278045Z","bundle_sha256":"fdaf441ed1062c45ce89f603079006b2cb9c9c6532e38867894b3f8dea25ebf1"}}