{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2010:DVF5MZSWLOLISGMSFM6EUX6TT6","short_pith_number":"pith:DVF5MZSW","canonical_record":{"source":{"id":"1012.1160","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2010-12-03T17:34:48Z","cross_cats_sorted":[],"title_canon_sha256":"f3f9e6912c8175bb21dfee7d5d68696ae0833912042efc38863de62a7b0eafa1","abstract_canon_sha256":"0f8cd2498adf9ca49da46856232ec2bd12da360963a9e690fa79599fe3e02bf3"},"schema_version":"1.0"},"canonical_sha256":"1d4bd666565b968919922b3c4a5fd39fbcd8d806fe1f458eb650fec28650d66b","source":{"kind":"arxiv","id":"1012.1160","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1012.1160","created_at":"2026-05-18T03:45:12Z"},{"alias_kind":"arxiv_version","alias_value":"1012.1160v1","created_at":"2026-05-18T03:45:12Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1012.1160","created_at":"2026-05-18T03:45:12Z"},{"alias_kind":"pith_short_12","alias_value":"DVF5MZSWLOLI","created_at":"2026-05-18T12:26:06Z"},{"alias_kind":"pith_short_16","alias_value":"DVF5MZSWLOLISGMS","created_at":"2026-05-18T12:26:06Z"},{"alias_kind":"pith_short_8","alias_value":"DVF5MZSW","created_at":"2026-05-18T12:26:06Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2010:DVF5MZSWLOLISGMSFM6EUX6TT6","target":"record","payload":{"canonical_record":{"source":{"id":"1012.1160","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2010-12-03T17:34:48Z","cross_cats_sorted":[],"title_canon_sha256":"f3f9e6912c8175bb21dfee7d5d68696ae0833912042efc38863de62a7b0eafa1","abstract_canon_sha256":"0f8cd2498adf9ca49da46856232ec2bd12da360963a9e690fa79599fe3e02bf3"},"schema_version":"1.0"},"canonical_sha256":"1d4bd666565b968919922b3c4a5fd39fbcd8d806fe1f458eb650fec28650d66b","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T03:45:12.690629Z","signature_b64":"uA2hQNXdm5vM5rDMIh9PwEAyTIASuCgdZniX58xzd7mi0kAD8OBhx5qeIRsg6Y3gHaX81aT765wZjcgVDrZ1DA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"1d4bd666565b968919922b3c4a5fd39fbcd8d806fe1f458eb650fec28650d66b","last_reissued_at":"2026-05-18T03:45:12.690033Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T03:45:12.690033Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1012.1160","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":"2026-05-18T03:45:12Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"7TVL94Xy/oA//tAMwdeJOp9w42JSJfGOhBVhFP+jDWpKHMhGwMWjkvZ49ku0iY8WZKJk5+F27Bu6uJzQE5eeDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-31T18:46:06.873125Z"},"content_sha256":"a3ea24a5eaa9f2d4f4a24868f115017a97ac63e3f7edae5fe607bb9b2e95fad6","schema_version":"1.0","event_id":"sha256:a3ea24a5eaa9f2d4f4a24868f115017a97ac63e3f7edae5fe607bb9b2e95fad6"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2010:DVF5MZSWLOLISGMSFM6EUX6TT6","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Diffusion in barred-spiral galaxies","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"Cristina Chiappini, Daniel Pfenniger, Maura Brunetti","submitted_at":"2010-12-03T17:34:48Z","abstract_excerpt":"We characterize the radial migration of stars in the disk plane by calculating the diffusion coefficient and the diffusion time-scale for a bulge-disk N-body self-consistent system with a marginally-stable Toomre-Q parameter. We find that diffusion is not constant in time, but follows the evolution of the bar, and becomes maximum near the corotation region and in the external disk region, where asymmetric patterns develop."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1012.1160","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":"2026-05-18T03:45:12Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"WXgmwra1fZUm5pm0VqeTrozUfO5gt3c1QzxXolfPHBNbz7i9OLTSBi39WVrGy9x9Oi+7LrNcQEAv2eXCCtM7DA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-31T18:46:06.873844Z"},"content_sha256":"d436bc59351e0564dd4076d64b523ff9ef1de62e1f93e5780a53f9ad1bea1683","schema_version":"1.0","event_id":"sha256:d436bc59351e0564dd4076d64b523ff9ef1de62e1f93e5780a53f9ad1bea1683"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/DVF5MZSWLOLISGMSFM6EUX6TT6/bundle.json","state_url":"https://pith.science/pith/DVF5MZSWLOLISGMSFM6EUX6TT6/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/DVF5MZSWLOLISGMSFM6EUX6TT6/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":"2026-05-31T18:46:06Z","links":{"resolver":"https://pith.science/pith/DVF5MZSWLOLISGMSFM6EUX6TT6","bundle":"https://pith.science/pith/DVF5MZSWLOLISGMSFM6EUX6TT6/bundle.json","state":"https://pith.science/pith/DVF5MZSWLOLISGMSFM6EUX6TT6/state.json","well_known_bundle":"https://pith.science/.well-known/pith/DVF5MZSWLOLISGMSFM6EUX6TT6/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2010:DVF5MZSWLOLISGMSFM6EUX6TT6","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":"0f8cd2498adf9ca49da46856232ec2bd12da360963a9e690fa79599fe3e02bf3","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2010-12-03T17:34:48Z","title_canon_sha256":"f3f9e6912c8175bb21dfee7d5d68696ae0833912042efc38863de62a7b0eafa1"},"schema_version":"1.0","source":{"id":"1012.1160","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1012.1160","created_at":"2026-05-18T03:45:12Z"},{"alias_kind":"arxiv_version","alias_value":"1012.1160v1","created_at":"2026-05-18T03:45:12Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1012.1160","created_at":"2026-05-18T03:45:12Z"},{"alias_kind":"pith_short_12","alias_value":"DVF5MZSWLOLI","created_at":"2026-05-18T12:26:06Z"},{"alias_kind":"pith_short_16","alias_value":"DVF5MZSWLOLISGMS","created_at":"2026-05-18T12:26:06Z"},{"alias_kind":"pith_short_8","alias_value":"DVF5MZSW","created_at":"2026-05-18T12:26:06Z"}],"graph_snapshots":[{"event_id":"sha256:d436bc59351e0564dd4076d64b523ff9ef1de62e1f93e5780a53f9ad1bea1683","target":"graph","created_at":"2026-05-18T03:45:12Z","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 characterize the radial migration of stars in the disk plane by calculating the diffusion coefficient and the diffusion time-scale for a bulge-disk N-body self-consistent system with a marginally-stable Toomre-Q parameter. We find that diffusion is not constant in time, but follows the evolution of the bar, and becomes maximum near the corotation region and in the external disk region, where asymmetric patterns develop.","authors_text":"Cristina Chiappini, Daniel Pfenniger, Maura Brunetti","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2010-12-03T17:34:48Z","title":"Diffusion in barred-spiral galaxies"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1012.1160","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:a3ea24a5eaa9f2d4f4a24868f115017a97ac63e3f7edae5fe607bb9b2e95fad6","target":"record","created_at":"2026-05-18T03:45:12Z","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":"0f8cd2498adf9ca49da46856232ec2bd12da360963a9e690fa79599fe3e02bf3","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2010-12-03T17:34:48Z","title_canon_sha256":"f3f9e6912c8175bb21dfee7d5d68696ae0833912042efc38863de62a7b0eafa1"},"schema_version":"1.0","source":{"id":"1012.1160","kind":"arxiv","version":1}},"canonical_sha256":"1d4bd666565b968919922b3c4a5fd39fbcd8d806fe1f458eb650fec28650d66b","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"1d4bd666565b968919922b3c4a5fd39fbcd8d806fe1f458eb650fec28650d66b","first_computed_at":"2026-05-18T03:45:12.690033Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T03:45:12.690033Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"uA2hQNXdm5vM5rDMIh9PwEAyTIASuCgdZniX58xzd7mi0kAD8OBhx5qeIRsg6Y3gHaX81aT765wZjcgVDrZ1DA==","signature_status":"signed_v1","signed_at":"2026-05-18T03:45:12.690629Z","signed_message":"canonical_sha256_bytes"},"source_id":"1012.1160","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:a3ea24a5eaa9f2d4f4a24868f115017a97ac63e3f7edae5fe607bb9b2e95fad6","sha256:d436bc59351e0564dd4076d64b523ff9ef1de62e1f93e5780a53f9ad1bea1683"],"state_sha256":"e1c212baca2020fdd6041954d4112c0ae50eb27598d7d2df81d603127d6caa0c"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"PYMitnisqb8O0mgAB83mMnExNb90qSdltA/JMEQbiJQxEyZCnBuyLEOwsaOUzBHxPgjoLeRsetf/iflI2kVdBg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-31T18:46:06.877728Z","bundle_sha256":"f4487e37de6c212aded27d3b7ea2e77fcae5d61dca8a132f31515038ed1f3698"}}