{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2013:4B2QXOMWG4FKXIOPJQYIMBQH3Z","short_pith_number":"pith:4B2QXOMW","schema_version":"1.0","canonical_sha256":"e0750bb996370aaba1cf4c30860607de5d2b98c2469d58d29ad7b01aeaae65b9","source":{"kind":"arxiv","id":"1309.0822","version":1},"attestation_state":"computed","paper":{"title":"The Bifurcated Age-Metallicity Relation of Milky Way Globular Clusters and its Implications For the Accretion History of the Galaxy","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"Don A. VandenBerg, J. Trevor Mendel, Ryan Leaman","submitted_at":"2013-09-03T20:00:14Z","abstract_excerpt":"We use recently derived ages for 61 Milky Way (MW) globular clusters (GCs) to show that their age-metallicity relation (AMR) can be divided into two distinct, parallel sequences at [Fe/H] $\\ga -1.8$. Approximately one-third of the clusters form an offset sequence that spans the full range in age ($\\sim 10.5$--13 Gyr), but is more metal rich at a given age by $\\sim 0.6$ dex in [Fe/H]. All but one of the clusters in the offset sequence show orbital properties that are consistent with membership in the MW disk. They are not simply the most metal-rich GCs, which have long been known to have disk-l"},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"1309.0822","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2013-09-03T20:00:14Z","cross_cats_sorted":[],"title_canon_sha256":"7d71fe3e523cea78cf679346c75962288f271fdfe4389fb3ade5dd06e7a0e295","abstract_canon_sha256":"5babd10c5e96bb355e4a8094248e1757348827110c77fae5eb4b0c812b4d4888"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:47:50.159871Z","signature_b64":"RihW3jOA4TBpfHV1UVziRRYy8O5ZsSX059wMsFKqdCxGtY0eWawKBDsjjJFnX6FuhVNKPQAzFMwgBo7xZxDTDQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"e0750bb996370aaba1cf4c30860607de5d2b98c2469d58d29ad7b01aeaae65b9","last_reissued_at":"2026-05-18T01:47:50.159387Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:47:50.159387Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"The Bifurcated Age-Metallicity Relation of Milky Way Globular Clusters and its Implications For the Accretion History of the Galaxy","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"Don A. VandenBerg, J. Trevor Mendel, Ryan Leaman","submitted_at":"2013-09-03T20:00:14Z","abstract_excerpt":"We use recently derived ages for 61 Milky Way (MW) globular clusters (GCs) to show that their age-metallicity relation (AMR) can be divided into two distinct, parallel sequences at [Fe/H] $\\ga -1.8$. Approximately one-third of the clusters form an offset sequence that spans the full range in age ($\\sim 10.5$--13 Gyr), but is more metal rich at a given age by $\\sim 0.6$ dex in [Fe/H]. All but one of the clusters in the offset sequence show orbital properties that are consistent with membership in the MW disk. They are not simply the most metal-rich GCs, which have long been known to have disk-l"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1309.0822","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"},"aliases":[{"alias_kind":"arxiv","alias_value":"1309.0822","created_at":"2026-05-18T01:47:50.159476+00:00"},{"alias_kind":"arxiv_version","alias_value":"1309.0822v1","created_at":"2026-05-18T01:47:50.159476+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1309.0822","created_at":"2026-05-18T01:47:50.159476+00:00"},{"alias_kind":"pith_short_12","alias_value":"4B2QXOMWG4FK","created_at":"2026-05-18T12:27:32.513160+00:00"},{"alias_kind":"pith_short_16","alias_value":"4B2QXOMWG4FKXIOP","created_at":"2026-05-18T12:27:32.513160+00:00"},{"alias_kind":"pith_short_8","alias_value":"4B2QXOMW","created_at":"2026-05-18T12:27:32.513160+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":1,"internal_anchor_count":1,"sample":[{"citing_arxiv_id":"2603.07481","citing_title":"New Way to Date Globular Clusters: Brown Dwarf Cooling Sequences","ref_index":107,"is_internal_anchor":true}]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/4B2QXOMWG4FKXIOPJQYIMBQH3Z","json":"https://pith.science/pith/4B2QXOMWG4FKXIOPJQYIMBQH3Z.json","graph_json":"https://pith.science/api/pith-number/4B2QXOMWG4FKXIOPJQYIMBQH3Z/graph.json","events_json":"https://pith.science/api/pith-number/4B2QXOMWG4FKXIOPJQYIMBQH3Z/events.json","paper":"https://pith.science/paper/4B2QXOMW"},"agent_actions":{"view_html":"https://pith.science/pith/4B2QXOMWG4FKXIOPJQYIMBQH3Z","download_json":"https://pith.science/pith/4B2QXOMWG4FKXIOPJQYIMBQH3Z.json","view_paper":"https://pith.science/paper/4B2QXOMW","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1309.0822&json=true","fetch_graph":"https://pith.science/api/pith-number/4B2QXOMWG4FKXIOPJQYIMBQH3Z/graph.json","fetch_events":"https://pith.science/api/pith-number/4B2QXOMWG4FKXIOPJQYIMBQH3Z/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/4B2QXOMWG4FKXIOPJQYIMBQH3Z/action/timestamp_anchor","attest_storage":"https://pith.science/pith/4B2QXOMWG4FKXIOPJQYIMBQH3Z/action/storage_attestation","attest_author":"https://pith.science/pith/4B2QXOMWG4FKXIOPJQYIMBQH3Z/action/author_attestation","sign_citation":"https://pith.science/pith/4B2QXOMWG4FKXIOPJQYIMBQH3Z/action/citation_signature","submit_replication":"https://pith.science/pith/4B2QXOMWG4FKXIOPJQYIMBQH3Z/action/replication_record"}},"created_at":"2026-05-18T01:47:50.159476+00:00","updated_at":"2026-05-18T01:47:50.159476+00:00"}