{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2022:RMDBLHJ4DPZEXHP5OB5D3NOIAP","short_pith_number":"pith:RMDBLHJ4","canonical_record":{"source":{"id":"2205.15611","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.SR","submitted_at":"2022-05-31T08:53:02Z","cross_cats_sorted":["astro-ph.GA"],"title_canon_sha256":"a95447c8bd4990af45654e3434bdc43fbd932be5fb033af1452fb76b0304ad6d","abstract_canon_sha256":"a7395b3f553d15bd50195b4a8459f0b6b20b6690a38f46cab6466c364943bd5e"},"schema_version":"1.0"},"canonical_sha256":"8b06159d3c1bf24b9dfd707a3db5c803c6ee008f937859b661c1c50722e1eb01","source":{"kind":"arxiv","id":"2205.15611","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2205.15611","created_at":"2026-07-05T04:30:00Z"},{"alias_kind":"arxiv_version","alias_value":"2205.15611v1","created_at":"2026-07-05T04:30:00Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2205.15611","created_at":"2026-07-05T04:30:00Z"},{"alias_kind":"pith_short_12","alias_value":"RMDBLHJ4DPZE","created_at":"2026-07-05T04:30:00Z"},{"alias_kind":"pith_short_16","alias_value":"RMDBLHJ4DPZEXHP5","created_at":"2026-07-05T04:30:00Z"},{"alias_kind":"pith_short_8","alias_value":"RMDBLHJ4","created_at":"2026-07-05T04:30:00Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2022:RMDBLHJ4DPZEXHP5OB5D3NOIAP","target":"record","payload":{"canonical_record":{"source":{"id":"2205.15611","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.SR","submitted_at":"2022-05-31T08:53:02Z","cross_cats_sorted":["astro-ph.GA"],"title_canon_sha256":"a95447c8bd4990af45654e3434bdc43fbd932be5fb033af1452fb76b0304ad6d","abstract_canon_sha256":"a7395b3f553d15bd50195b4a8459f0b6b20b6690a38f46cab6466c364943bd5e"},"schema_version":"1.0"},"canonical_sha256":"8b06159d3c1bf24b9dfd707a3db5c803c6ee008f937859b661c1c50722e1eb01","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T04:30:00.428526Z","signature_b64":"T5c7KZ0D98pZWI3JDqFI05RBifbRGNFYrlZLkZ/3qNajIF9Z2z50Vr3sy5qG9s4lbl6SxqL4wlHPwqe381+OBQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"8b06159d3c1bf24b9dfd707a3db5c803c6ee008f937859b661c1c50722e1eb01","last_reissued_at":"2026-07-05T04:30:00.428015Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T04:30:00.428015Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2205.15611","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":"2026-07-05T04:30:00Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"fpprmyiP1KmD1KFx6RQ1B/oFdpPCMsscKoMbnI+j3A1ad0lP6OFCEtyLGqZCtj58llKZCrMIpGnK15d/ynZlDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-27T18:25:04.732227Z"},"content_sha256":"df17fe8a78ff556abfb36aa153f444c1923796a437f311b5f83e2fde32d24836","schema_version":"1.0","event_id":"sha256:df17fe8a78ff556abfb36aa153f444c1923796a437f311b5f83e2fde32d24836"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2022:RMDBLHJ4DPZEXHP5OB5D3NOIAP","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Large-scale expansion of OB stars in Cygnus","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":["astro-ph.GA"],"primary_cat":"astro-ph.SR","authors_text":"Alexis L. Quintana, Nicholas J. Wright","submitted_at":"2022-05-31T08:53:02Z","abstract_excerpt":"The proper motions (PMs) of OB stars in Cygnus have recently been found to exhibit two large-scale kinematic patterns suggestive of expansion. We perform a 3D traceback on these OB stars, the newly-identified OB associations and related open clusters in the region. We find that there are two groups of stars, associations and clusters and that they were each more compact in the past, reaching their closest approach $7.9^{+3.0}_{-1.8}$ and $8.5^{+0.8}_{-2.8}$ Myr ago. We consider two main scenarios for the driver of these large-scale expansion patterns: feedback-driven expansion from a previous "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2205.15611","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/2205.15611/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":"2026-07-05T04:30:00Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"8c8kqlU0VhZnG9LoKJfwE7MvZMlxs9/2YMjFyzbNTMHJViCF9A5NoIzuJ0P9ugg4yJO8nF0PDuz841+aJUVmDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-27T18:25:04.732617Z"},"content_sha256":"72d36f91bede355e5d1a4b2a27bb7015e5419dbf2b225fb2befb59e38c08439a","schema_version":"1.0","event_id":"sha256:72d36f91bede355e5d1a4b2a27bb7015e5419dbf2b225fb2befb59e38c08439a"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/RMDBLHJ4DPZEXHP5OB5D3NOIAP/bundle.json","state_url":"https://pith.science/pith/RMDBLHJ4DPZEXHP5OB5D3NOIAP/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/RMDBLHJ4DPZEXHP5OB5D3NOIAP/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":"2026-07-27T18:25:04Z","links":{"resolver":"https://pith.science/pith/RMDBLHJ4DPZEXHP5OB5D3NOIAP","bundle":"https://pith.science/pith/RMDBLHJ4DPZEXHP5OB5D3NOIAP/bundle.json","state":"https://pith.science/pith/RMDBLHJ4DPZEXHP5OB5D3NOIAP/state.json","well_known_bundle":"https://pith.science/.well-known/pith/RMDBLHJ4DPZEXHP5OB5D3NOIAP/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2022:RMDBLHJ4DPZEXHP5OB5D3NOIAP","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":"a7395b3f553d15bd50195b4a8459f0b6b20b6690a38f46cab6466c364943bd5e","cross_cats_sorted":["astro-ph.GA"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.SR","submitted_at":"2022-05-31T08:53:02Z","title_canon_sha256":"a95447c8bd4990af45654e3434bdc43fbd932be5fb033af1452fb76b0304ad6d"},"schema_version":"1.0","source":{"id":"2205.15611","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2205.15611","created_at":"2026-07-05T04:30:00Z"},{"alias_kind":"arxiv_version","alias_value":"2205.15611v1","created_at":"2026-07-05T04:30:00Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2205.15611","created_at":"2026-07-05T04:30:00Z"},{"alias_kind":"pith_short_12","alias_value":"RMDBLHJ4DPZE","created_at":"2026-07-05T04:30:00Z"},{"alias_kind":"pith_short_16","alias_value":"RMDBLHJ4DPZEXHP5","created_at":"2026-07-05T04:30:00Z"},{"alias_kind":"pith_short_8","alias_value":"RMDBLHJ4","created_at":"2026-07-05T04:30:00Z"}],"graph_snapshots":[{"event_id":"sha256:72d36f91bede355e5d1a4b2a27bb7015e5419dbf2b225fb2befb59e38c08439a","target":"graph","created_at":"2026-07-05T04:30:00Z","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/2205.15611/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"The proper motions (PMs) of OB stars in Cygnus have recently been found to exhibit two large-scale kinematic patterns suggestive of expansion. We perform a 3D traceback on these OB stars, the newly-identified OB associations and related open clusters in the region. We find that there are two groups of stars, associations and clusters and that they were each more compact in the past, reaching their closest approach $7.9^{+3.0}_{-1.8}$ and $8.5^{+0.8}_{-2.8}$ Myr ago. We consider two main scenarios for the driver of these large-scale expansion patterns: feedback-driven expansion from a previous ","authors_text":"Alexis L. Quintana, Nicholas J. Wright","cross_cats":["astro-ph.GA"],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.SR","submitted_at":"2022-05-31T08:53:02Z","title":"Large-scale expansion of OB stars in Cygnus"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2205.15611","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:df17fe8a78ff556abfb36aa153f444c1923796a437f311b5f83e2fde32d24836","target":"record","created_at":"2026-07-05T04:30:00Z","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":"a7395b3f553d15bd50195b4a8459f0b6b20b6690a38f46cab6466c364943bd5e","cross_cats_sorted":["astro-ph.GA"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.SR","submitted_at":"2022-05-31T08:53:02Z","title_canon_sha256":"a95447c8bd4990af45654e3434bdc43fbd932be5fb033af1452fb76b0304ad6d"},"schema_version":"1.0","source":{"id":"2205.15611","kind":"arxiv","version":1}},"canonical_sha256":"8b06159d3c1bf24b9dfd707a3db5c803c6ee008f937859b661c1c50722e1eb01","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"8b06159d3c1bf24b9dfd707a3db5c803c6ee008f937859b661c1c50722e1eb01","first_computed_at":"2026-07-05T04:30:00.428015Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T04:30:00.428015Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"T5c7KZ0D98pZWI3JDqFI05RBifbRGNFYrlZLkZ/3qNajIF9Z2z50Vr3sy5qG9s4lbl6SxqL4wlHPwqe381+OBQ==","signature_status":"signed_v1","signed_at":"2026-07-05T04:30:00.428526Z","signed_message":"canonical_sha256_bytes"},"source_id":"2205.15611","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:df17fe8a78ff556abfb36aa153f444c1923796a437f311b5f83e2fde32d24836","sha256:72d36f91bede355e5d1a4b2a27bb7015e5419dbf2b225fb2befb59e38c08439a"],"state_sha256":"3093adf8860c5914edb103e564c847995b2b8ee7e39ba953e71d258839ff8375"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"TfQkg7h8angykqmUPEbLgRPkXsoHnfRzeOGYHMSolf6eQG147IiGE/YSVRU49Wy3+agpCIYExG3W1y1AdvUEDQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-27T18:25:04.734799Z","bundle_sha256":"4ac8758640f3bcd84e792b804f0f9a5e9c556dc9e758f80ea11a0d9e26481cb6"}}