{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2022:4TEAS2QVB2OA6Z6EA6T2I5M2CJ","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":"10d59665865a25fb27e95ad35ba817a7262d09c198ad4b77c2721aef7b4f9e83","cross_cats_sorted":["astro-ph.GA"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.SR","submitted_at":"2022-08-26T23:15:30Z","title_canon_sha256":"f765a0ce2de2827dba1ffb66b844050acf99f36ee5b09f2641f2418ce7998ec0"},"schema_version":"1.0","source":{"id":"2208.12891","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2208.12891","created_at":"2026-07-05T04:52:00Z"},{"alias_kind":"arxiv_version","alias_value":"2208.12891v1","created_at":"2026-07-05T04:52:00Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2208.12891","created_at":"2026-07-05T04:52:00Z"},{"alias_kind":"pith_short_12","alias_value":"4TEAS2QVB2OA","created_at":"2026-07-05T04:52:00Z"},{"alias_kind":"pith_short_16","alias_value":"4TEAS2QVB2OA6Z6E","created_at":"2026-07-05T04:52:00Z"},{"alias_kind":"pith_short_8","alias_value":"4TEAS2QV","created_at":"2026-07-05T04:52:00Z"}],"graph_snapshots":[{"event_id":"sha256:f17ee6bbe970082a1bfe87852ff678c1ac25653aee211eac1fbce018ad3ab3d0","target":"graph","created_at":"2026-07-05T04:52:00Z","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/2208.12891/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"The abundance ratios [Y$/$Mg], [Y$/$Al], [Y$/$Si], [Y$/$Ca], and [Y$/$Ti] have been suggested as chemical clocks for solar-metallicity dwarf stars in the field as well as for giant stars in open clusters. To verify this last hypothesis, we derive these abundances ratios of 50 giant stars belonging to seven open clusters. To calculate the abundances, we analyze FEROS spectra assuming the LTE-hypothesis. We confirm that [Y$/$Mg], [Y$/$Al], [Y$/$Si], [Y$/$Ca], and [Y$/$Ti] work as chemical clocks for field dwarf stars at the local region (d $<$ 1 kpc) whereas for the field giants the [Y$/$Mg], [Y","authors_text":"Geraldo Gon\\c{c}alves, Leandro Kerber, Orlando J. Katime Santrich, Yuri Abuchaim","cross_cats":["astro-ph.GA"],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.SR","submitted_at":"2022-08-26T23:15:30Z","title":"On the validity of the spectroscopic age indicators [Y/Mg], [Y/Al], [Y/Si], [Y/Ca], and [Y/Ti] for giant stars"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2208.12891","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":"sha256:062756962942b89d4c33506b3830aad15fdbc60749f187a5ef70ba6f7384effe","target":"record","created_at":"2026-07-05T04:52:00Z","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":"10d59665865a25fb27e95ad35ba817a7262d09c198ad4b77c2721aef7b4f9e83","cross_cats_sorted":["astro-ph.GA"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.SR","submitted_at":"2022-08-26T23:15:30Z","title_canon_sha256":"f765a0ce2de2827dba1ffb66b844050acf99f36ee5b09f2641f2418ce7998ec0"},"schema_version":"1.0","source":{"id":"2208.12891","kind":"arxiv","version":1}},"canonical_sha256":"e4c8096a150e9c0f67c407a7a4759a12740b21a1d67ebf39b1cef70a7a8cf9d4","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"e4c8096a150e9c0f67c407a7a4759a12740b21a1d67ebf39b1cef70a7a8cf9d4","first_computed_at":"2026-07-05T04:52:00.468812Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T04:52:00.468812Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"grosVQXQTCDgYMEExiRj9sEYst8YLbdnEnnDBmlpAA7G6AyRcD0eEEc5YfZRTJj0N7CK7a+0y3ftwkH8SMTyCQ==","signature_status":"signed_v1","signed_at":"2026-07-05T04:52:00.469257Z","signed_message":"canonical_sha256_bytes"},"source_id":"2208.12891","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:062756962942b89d4c33506b3830aad15fdbc60749f187a5ef70ba6f7384effe","sha256:f17ee6bbe970082a1bfe87852ff678c1ac25653aee211eac1fbce018ad3ab3d0"],"state_sha256":"7d8eec59edc170256ddb26ab6b2bec88e839bc561a2623f6f506a230d7192c2e"}