{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2004:CWHHUAYNW4BHH4OAPTZ4YT6QKO","short_pith_number":"pith:CWHHUAYN","schema_version":"1.0","canonical_sha256":"158e7a030db70273f1c07cf3cc4fd05385a975db51f8f79b88547e616eb22220","source":{"kind":"arxiv","id":"astro-ph/0407305","version":1},"attestation_state":"computed","paper":{"title":"Lithium evolution in intermediate age and old open clusters: NGC 752 revisited","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"P. Sestito (Dipartimento di Astronomia, R. Pallavicini (INAF/Osservatorio Astronomico di Palermo), S. Randich (INAF/Osservatorio Astrofisico di Arcetri), Universita' di Firenze)","submitted_at":"2004-07-15T10:40:57Z","abstract_excerpt":"We present new high resolution spectroscopic observations of the intermediate age (~2 Gyr) open cluster NGC 752. We investigate the Li vs. Teff distribution and we obtain a new accurate determination of the cluster metallicity. We compare the results for NGC 752 with other intermediate age and old clusters spanning the age range from the Hyades (~0.6 Gyr) to NGC 188 (~6-8 Gyr). We find that NGC 752 has a solar iron content ([Fe/H]=+0.01+/-0.04), at variance with early reports of sub-solar metallicity. We find that NGC 752 is only slightly more Li depleted than the younger Hyades and has a Li p"},"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":"astro-ph/0407305","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"2004-07-15T10:40:57Z","cross_cats_sorted":[],"title_canon_sha256":"32c19fda80e8f2aedb78e89c88d0f246e67a346fe59d0bfa1e0bddd4c5a78a27","abstract_canon_sha256":"879776ff9e0ab79c0cdfc8c61938e0db8fd054158debe6c16ce9bf3496ec2ed0"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-04T16:44:18.961635Z","signature_b64":"9m0pxrfSiwPxwujGzHZqltlweuUoU9HbVkCt3PPf0SHt5vjJvyvkDsModUkstJTSybTOBtOgjeXcnqbiBXmHAQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"158e7a030db70273f1c07cf3cc4fd05385a975db51f8f79b88547e616eb22220","last_reissued_at":"2026-07-04T16:44:18.961143Z","signature_status":"signed_v1","first_computed_at":"2026-07-04T16:44:18.961143Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Lithium evolution in intermediate age and old open clusters: NGC 752 revisited","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"P. Sestito (Dipartimento di Astronomia, R. Pallavicini (INAF/Osservatorio Astronomico di Palermo), S. Randich (INAF/Osservatorio Astrofisico di Arcetri), Universita' di Firenze)","submitted_at":"2004-07-15T10:40:57Z","abstract_excerpt":"We present new high resolution spectroscopic observations of the intermediate age (~2 Gyr) open cluster NGC 752. We investigate the Li vs. Teff distribution and we obtain a new accurate determination of the cluster metallicity. We compare the results for NGC 752 with other intermediate age and old clusters spanning the age range from the Hyades (~0.6 Gyr) to NGC 188 (~6-8 Gyr). We find that NGC 752 has a solar iron content ([Fe/H]=+0.01+/-0.04), at variance with early reports of sub-solar metallicity. We find that NGC 752 is only slightly more Li depleted than the younger Hyades and has a Li p"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0407305","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/astro-ph/0407305/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"},"aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/0407305","created_at":"2026-07-04T16:44:18.961206+00:00"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/0407305v1","created_at":"2026-07-04T16:44:18.961206+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/0407305","created_at":"2026-07-04T16:44:18.961206+00:00"},{"alias_kind":"pith_short_12","alias_value":"CWHHUAYNW4BH","created_at":"2026-07-04T16:44:18.961206+00:00"},{"alias_kind":"pith_short_16","alias_value":"CWHHUAYNW4BHH4OA","created_at":"2026-07-04T16:44:18.961206+00:00"},{"alias_kind":"pith_short_8","alias_value":"CWHHUAYN","created_at":"2026-07-04T16:44:18.961206+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":0,"internal_anchor_count":0,"sample":[]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/CWHHUAYNW4BHH4OAPTZ4YT6QKO","json":"https://pith.science/pith/CWHHUAYNW4BHH4OAPTZ4YT6QKO.json","graph_json":"https://pith.science/api/pith-number/CWHHUAYNW4BHH4OAPTZ4YT6QKO/graph.json","events_json":"https://pith.science/api/pith-number/CWHHUAYNW4BHH4OAPTZ4YT6QKO/events.json","paper":"https://pith.science/paper/CWHHUAYN"},"agent_actions":{"view_html":"https://pith.science/pith/CWHHUAYNW4BHH4OAPTZ4YT6QKO","download_json":"https://pith.science/pith/CWHHUAYNW4BHH4OAPTZ4YT6QKO.json","view_paper":"https://pith.science/paper/CWHHUAYN","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=astro-ph/0407305&json=true","fetch_graph":"https://pith.science/api/pith-number/CWHHUAYNW4BHH4OAPTZ4YT6QKO/graph.json","fetch_events":"https://pith.science/api/pith-number/CWHHUAYNW4BHH4OAPTZ4YT6QKO/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/CWHHUAYNW4BHH4OAPTZ4YT6QKO/action/timestamp_anchor","attest_storage":"https://pith.science/pith/CWHHUAYNW4BHH4OAPTZ4YT6QKO/action/storage_attestation","attest_author":"https://pith.science/pith/CWHHUAYNW4BHH4OAPTZ4YT6QKO/action/author_attestation","sign_citation":"https://pith.science/pith/CWHHUAYNW4BHH4OAPTZ4YT6QKO/action/citation_signature","submit_replication":"https://pith.science/pith/CWHHUAYNW4BHH4OAPTZ4YT6QKO/action/replication_record"}},"created_at":"2026-07-04T16:44:18.961206+00:00","updated_at":"2026-07-04T16:44:18.961206+00:00"}