{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2010:HG635P2ERMBODLNH3CMMTSYN7L","short_pith_number":"pith:HG635P2E","canonical_record":{"source":{"id":"1002.4357","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2010-02-23T15:58:01Z","cross_cats_sorted":["astro-ph.CO"],"title_canon_sha256":"b0448ad58e09484ca5f71114c4d12e8280b32594801fc1c71101327a566cf274","abstract_canon_sha256":"79f5920975c6e56f15b50b34f6de86d146e0fe8754a893148190a16eaa181ab4"},"schema_version":"1.0"},"canonical_sha256":"39bdbebf448b02e1ada7d898c9cb0dfadb3b4954308ca9c6962a8160acb8d842","source":{"kind":"arxiv","id":"1002.4357","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1002.4357","created_at":"2026-05-18T02:08:57Z"},{"alias_kind":"arxiv_version","alias_value":"1002.4357v1","created_at":"2026-05-18T02:08:57Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1002.4357","created_at":"2026-05-18T02:08:57Z"},{"alias_kind":"pith_short_12","alias_value":"HG635P2ERMBO","created_at":"2026-05-18T12:26:07Z"},{"alias_kind":"pith_short_16","alias_value":"HG635P2ERMBODLNH","created_at":"2026-05-18T12:26:07Z"},{"alias_kind":"pith_short_8","alias_value":"HG635P2E","created_at":"2026-05-18T12:26:07Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2010:HG635P2ERMBODLNH3CMMTSYN7L","target":"record","payload":{"canonical_record":{"source":{"id":"1002.4357","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2010-02-23T15:58:01Z","cross_cats_sorted":["astro-ph.CO"],"title_canon_sha256":"b0448ad58e09484ca5f71114c4d12e8280b32594801fc1c71101327a566cf274","abstract_canon_sha256":"79f5920975c6e56f15b50b34f6de86d146e0fe8754a893148190a16eaa181ab4"},"schema_version":"1.0"},"canonical_sha256":"39bdbebf448b02e1ada7d898c9cb0dfadb3b4954308ca9c6962a8160acb8d842","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:08:57.750724Z","signature_b64":"22hL+6q6+QAgrR50J++TZ4nrC5+3f218FgNwptgF4jw2LxDFg4MTCpFOVxIPnlv1+Fi7ehivudAk+S2zgNgoBQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"39bdbebf448b02e1ada7d898c9cb0dfadb3b4954308ca9c6962a8160acb8d842","last_reissued_at":"2026-05-18T02:08:57.750106Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:08:57.750106Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1002.4357","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":"2026-05-18T02:08:57Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"w1UD0josnoOt3ZgQJ9ZylfRWkWB9GbSfuu3Kom+4FMsipn5jTvGexGDYKgJJVcHLJ12E5LGfMarPYf5AO9oFCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-23T11:08:21.405258Z"},"content_sha256":"b3b17f2e3e9701dfc630d2b8eb7e9b0a9fbbcb893e7817f522af58b92dfe291a","schema_version":"1.0","event_id":"sha256:b3b17f2e3e9701dfc630d2b8eb7e9b0a9fbbcb893e7817f522af58b92dfe291a"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2010:HG635P2ERMBODLNH3CMMTSYN7L","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"The Long-term Evolution of the Galactic Disk Traced by Dissolving Star Clusters","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.CO"],"primary_cat":"astro-ph.GA","authors_text":"Joss Bland-Hawthorn, Ken Freeman, Mark Krumholz","submitted_at":"2010-02-23T15:58:01Z","abstract_excerpt":"The Galactic disk retains a vast amount of information about how it came to be, and how it evolved over cosmic time. However, we know very little about the secular processes associated with disk evolution. One major uncertainty is the extent to which stars migrate radially through the disk, thereby washing out signatures of their past (e.g. birth sites). Recent theoretical work finds that such \"blurring\" of the disk can be important if spiral arms are transient phenomena. Here we describe an experiment to determine the importance of diffusion from the Solar circle with cosmic time. Consider a "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1002.4357","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":"2026-05-18T02:08:57Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"yny8bCS6JzrlbR0V0p8lQU+ubHDJEgpkvTM1P0WjefV52j7j92rqQz7o2njoL88+ZURn+7pP+C/6Z8A1IU1YBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-23T11:08:21.406024Z"},"content_sha256":"2ae7dd749c75f4e964eeff0df757fd8c0eac8a697e9250e7679016064d64d7a1","schema_version":"1.0","event_id":"sha256:2ae7dd749c75f4e964eeff0df757fd8c0eac8a697e9250e7679016064d64d7a1"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/HG635P2ERMBODLNH3CMMTSYN7L/bundle.json","state_url":"https://pith.science/pith/HG635P2ERMBODLNH3CMMTSYN7L/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/HG635P2ERMBODLNH3CMMTSYN7L/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":"2026-05-23T11:08:21Z","links":{"resolver":"https://pith.science/pith/HG635P2ERMBODLNH3CMMTSYN7L","bundle":"https://pith.science/pith/HG635P2ERMBODLNH3CMMTSYN7L/bundle.json","state":"https://pith.science/pith/HG635P2ERMBODLNH3CMMTSYN7L/state.json","well_known_bundle":"https://pith.science/.well-known/pith/HG635P2ERMBODLNH3CMMTSYN7L/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2010:HG635P2ERMBODLNH3CMMTSYN7L","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":"79f5920975c6e56f15b50b34f6de86d146e0fe8754a893148190a16eaa181ab4","cross_cats_sorted":["astro-ph.CO"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2010-02-23T15:58:01Z","title_canon_sha256":"b0448ad58e09484ca5f71114c4d12e8280b32594801fc1c71101327a566cf274"},"schema_version":"1.0","source":{"id":"1002.4357","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1002.4357","created_at":"2026-05-18T02:08:57Z"},{"alias_kind":"arxiv_version","alias_value":"1002.4357v1","created_at":"2026-05-18T02:08:57Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1002.4357","created_at":"2026-05-18T02:08:57Z"},{"alias_kind":"pith_short_12","alias_value":"HG635P2ERMBO","created_at":"2026-05-18T12:26:07Z"},{"alias_kind":"pith_short_16","alias_value":"HG635P2ERMBODLNH","created_at":"2026-05-18T12:26:07Z"},{"alias_kind":"pith_short_8","alias_value":"HG635P2E","created_at":"2026-05-18T12:26:07Z"}],"graph_snapshots":[{"event_id":"sha256:2ae7dd749c75f4e964eeff0df757fd8c0eac8a697e9250e7679016064d64d7a1","target":"graph","created_at":"2026-05-18T02:08:57Z","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 Galactic disk retains a vast amount of information about how it came to be, and how it evolved over cosmic time. However, we know very little about the secular processes associated with disk evolution. One major uncertainty is the extent to which stars migrate radially through the disk, thereby washing out signatures of their past (e.g. birth sites). Recent theoretical work finds that such \"blurring\" of the disk can be important if spiral arms are transient phenomena. Here we describe an experiment to determine the importance of diffusion from the Solar circle with cosmic time. Consider a ","authors_text":"Joss Bland-Hawthorn, Ken Freeman, Mark Krumholz","cross_cats":["astro-ph.CO"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2010-02-23T15:58:01Z","title":"The Long-term Evolution of the Galactic Disk Traced by Dissolving Star Clusters"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1002.4357","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:b3b17f2e3e9701dfc630d2b8eb7e9b0a9fbbcb893e7817f522af58b92dfe291a","target":"record","created_at":"2026-05-18T02:08:57Z","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":"79f5920975c6e56f15b50b34f6de86d146e0fe8754a893148190a16eaa181ab4","cross_cats_sorted":["astro-ph.CO"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2010-02-23T15:58:01Z","title_canon_sha256":"b0448ad58e09484ca5f71114c4d12e8280b32594801fc1c71101327a566cf274"},"schema_version":"1.0","source":{"id":"1002.4357","kind":"arxiv","version":1}},"canonical_sha256":"39bdbebf448b02e1ada7d898c9cb0dfadb3b4954308ca9c6962a8160acb8d842","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"39bdbebf448b02e1ada7d898c9cb0dfadb3b4954308ca9c6962a8160acb8d842","first_computed_at":"2026-05-18T02:08:57.750106Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:08:57.750106Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"22hL+6q6+QAgrR50J++TZ4nrC5+3f218FgNwptgF4jw2LxDFg4MTCpFOVxIPnlv1+Fi7ehivudAk+S2zgNgoBQ==","signature_status":"signed_v1","signed_at":"2026-05-18T02:08:57.750724Z","signed_message":"canonical_sha256_bytes"},"source_id":"1002.4357","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:b3b17f2e3e9701dfc630d2b8eb7e9b0a9fbbcb893e7817f522af58b92dfe291a","sha256:2ae7dd749c75f4e964eeff0df757fd8c0eac8a697e9250e7679016064d64d7a1"],"state_sha256":"2c62ce5b123872690836f893a17939f006e914a23d5c16fe63167e5e920cd4a4"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"DaR6qVYRJUoDDJmUHUC6WD8h3u4Mh6p40/jRLRQkKE/rnvaVunXxKrXyUEiiu1gpDNxLTG1eP9q8XEPhwZpnAA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-23T11:08:21.409277Z","bundle_sha256":"60b8257fee91ade5bf75f5773b6245bc7eabfbec217d761ab5b39e5cfb767d37"}}