{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2025:B2OEOJHHF4CGD5WOF5D53XMEAU","short_pith_number":"pith:B2OEOJHH","schema_version":"1.0","canonical_sha256":"0e9c4724e72f0461f6ce2f47dddd840500bdd681954351174cb5b973302c4c3d","source":{"kind":"arxiv","id":"2508.16717","version":1},"attestation_state":"computed","paper":{"title":"Optical Spectroscopy Reveals Hidden Neutron-capture Elemental Abundance Differences among APOGEE-identified Chemical Doppelg\\\"angers","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":["astro-ph.GA"],"primary_cat":"astro-ph.SR","authors_text":"Andrew Casey, Carrie Filion, Catherine Manea, David W. Hogg, Emily J. Griffith, Greg Zeimann, Kathryn Johnston, Keith Hawkins, Melissa Ness, Micah Marks, Tyler Nelson, Zoe Hackshaw","submitted_at":"2025-08-22T18:00:00Z","abstract_excerpt":"Grouping stars by chemical similarity has the potential to reveal the Milky Way's evolutionary history. The APOGEE stellar spectroscopic survey has the resolution and sensitivity for this task. However, APOGEE lacks access to strong lines of neutron-capture elements ($Z > 28$) which have nucleosynthetic origins that are distinct from those of the lighter elements. We assess whether APOGEE abundances are sufficient for selecting chemically similar disk stars by identifying 25 pairs of chemical ``doppelgangers'' in APOGEE DR17 and following them up with the Tull spectrograph, an optical, $R \\sim"},"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":"2508.16717","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.SR","submitted_at":"2025-08-22T18:00:00Z","cross_cats_sorted":["astro-ph.GA"],"title_canon_sha256":"cc9ea696484c127a28f038778b55962d937ef28b2b36bbe5b68daa7b98b3e6fd","abstract_canon_sha256":"20a3bb7535ff9c6947e2fba3b351257221dd95ba49b4a6665ccdb1e459f365af"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T11:58:02.466916Z","signature_b64":"5aY5pF14VQCkL2qSi/rwVKS1UoPiwiXG3TaStnOuARcyqv1cKgvmi5l2QTLwR3OiLeRZjkIQ9WfSv794bGoeDg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"0e9c4724e72f0461f6ce2f47dddd840500bdd681954351174cb5b973302c4c3d","last_reissued_at":"2026-07-05T11:58:02.466408Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T11:58:02.466408Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Optical Spectroscopy Reveals Hidden Neutron-capture Elemental Abundance Differences among APOGEE-identified Chemical Doppelg\\\"angers","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":["astro-ph.GA"],"primary_cat":"astro-ph.SR","authors_text":"Andrew Casey, Carrie Filion, Catherine Manea, David W. Hogg, Emily J. Griffith, Greg Zeimann, Kathryn Johnston, Keith Hawkins, Melissa Ness, Micah Marks, Tyler Nelson, Zoe Hackshaw","submitted_at":"2025-08-22T18:00:00Z","abstract_excerpt":"Grouping stars by chemical similarity has the potential to reveal the Milky Way's evolutionary history. The APOGEE stellar spectroscopic survey has the resolution and sensitivity for this task. However, APOGEE lacks access to strong lines of neutron-capture elements ($Z > 28$) which have nucleosynthetic origins that are distinct from those of the lighter elements. We assess whether APOGEE abundances are sufficient for selecting chemically similar disk stars by identifying 25 pairs of chemical ``doppelgangers'' in APOGEE DR17 and following them up with the Tull spectrograph, an optical, $R \\sim"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2508.16717","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/2508.16717/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":"2508.16717","created_at":"2026-07-05T11:58:02.466486+00:00"},{"alias_kind":"arxiv_version","alias_value":"2508.16717v1","created_at":"2026-07-05T11:58:02.466486+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2508.16717","created_at":"2026-07-05T11:58:02.466486+00:00"},{"alias_kind":"pith_short_12","alias_value":"B2OEOJHHF4CG","created_at":"2026-07-05T11:58:02.466486+00:00"},{"alias_kind":"pith_short_16","alias_value":"B2OEOJHHF4CGD5WO","created_at":"2026-07-05T11:58:02.466486+00:00"},{"alias_kind":"pith_short_8","alias_value":"B2OEOJHH","created_at":"2026-07-05T11:58:02.466486+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":1,"internal_anchor_count":0,"sample":[{"citing_arxiv_id":"2605.20487","citing_title":"Milky Way Mapper decoded abundances -- I. Shared disc enrichment patterns","ref_index":40,"is_internal_anchor":false}]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/B2OEOJHHF4CGD5WOF5D53XMEAU","json":"https://pith.science/pith/B2OEOJHHF4CGD5WOF5D53XMEAU.json","graph_json":"https://pith.science/api/pith-number/B2OEOJHHF4CGD5WOF5D53XMEAU/graph.json","events_json":"https://pith.science/api/pith-number/B2OEOJHHF4CGD5WOF5D53XMEAU/events.json","paper":"https://pith.science/paper/B2OEOJHH"},"agent_actions":{"view_html":"https://pith.science/pith/B2OEOJHHF4CGD5WOF5D53XMEAU","download_json":"https://pith.science/pith/B2OEOJHHF4CGD5WOF5D53XMEAU.json","view_paper":"https://pith.science/paper/B2OEOJHH","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=2508.16717&json=true","fetch_graph":"https://pith.science/api/pith-number/B2OEOJHHF4CGD5WOF5D53XMEAU/graph.json","fetch_events":"https://pith.science/api/pith-number/B2OEOJHHF4CGD5WOF5D53XMEAU/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/B2OEOJHHF4CGD5WOF5D53XMEAU/action/timestamp_anchor","attest_storage":"https://pith.science/pith/B2OEOJHHF4CGD5WOF5D53XMEAU/action/storage_attestation","attest_author":"https://pith.science/pith/B2OEOJHHF4CGD5WOF5D53XMEAU/action/author_attestation","sign_citation":"https://pith.science/pith/B2OEOJHHF4CGD5WOF5D53XMEAU/action/citation_signature","submit_replication":"https://pith.science/pith/B2OEOJHHF4CGD5WOF5D53XMEAU/action/replication_record"}},"created_at":"2026-07-05T11:58:02.466486+00:00","updated_at":"2026-07-05T11:58:02.466486+00:00"}