{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2008:FGLAUTNBG4MNTUZMOXWD4RZVUF","short_pith_number":"pith:FGLAUTNB","schema_version":"1.0","canonical_sha256":"29960a4da13718d9d32c75ec3e4735a1506be0603519ea578921d8522822f0ca","source":{"kind":"arxiv","id":"0806.4465","version":1},"attestation_state":"computed","paper":{"title":"The Chemical Enrichment History of the Small Magellanic Cloud and Its Gradients","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"Antonio Aparicio, Carme Gallart, Edgardo Costa, Noelia E. D. No\\\"el, Rene A. M\\'endez, Ricardo Carrera","submitted_at":"2008-06-27T09:06:54Z","abstract_excerpt":"We present stellar metallicities derived from Ca II triplet spectroscopy in over 350 red giant branch stars in 13 fields distributed in different positions in the SMC, ranging from $\\sim$1\\arcdeg\\@ to $\\sim$4\\arcdeg\\@ from its center. In the innermost fields the average metallicity is [Fe/H] $\\sim -1$. This value decreases when we move away towards outermost regions. This is the first detection of a metallicity gradient in this galaxy. We show that the metallicity gradient is related to an age gradient, in the sense that more metal-rich stars, which are also younger, are concentrated in the ce"},"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":"0806.4465","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph","submitted_at":"2008-06-27T09:06:54Z","cross_cats_sorted":[],"title_canon_sha256":"1e3a5871b1a7cf77410760e4bef5026233545e461a73aaa85cbcf3ba193dd19b","abstract_canon_sha256":"076fe0f6022bf4e3721ce01c9d053ce53843e2ddf0f963e7d2eafe627f1ecc55"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-04T17:11:33.291225Z","signature_b64":"Saek0Nll9XWmosAXYDN4QzHu5fj9nBs4hxCDRKF1ObSg1jwlMKVNzcE7DJprPbVFT3qM6N/xttW57Ao8rfYFCA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"29960a4da13718d9d32c75ec3e4735a1506be0603519ea578921d8522822f0ca","last_reissued_at":"2026-07-04T17:11:33.290887Z","signature_status":"signed_v1","first_computed_at":"2026-07-04T17:11:33.290887Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"The Chemical Enrichment History of the Small Magellanic Cloud and Its Gradients","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"Antonio Aparicio, Carme Gallart, Edgardo Costa, Noelia E. D. No\\\"el, Rene A. M\\'endez, Ricardo Carrera","submitted_at":"2008-06-27T09:06:54Z","abstract_excerpt":"We present stellar metallicities derived from Ca II triplet spectroscopy in over 350 red giant branch stars in 13 fields distributed in different positions in the SMC, ranging from $\\sim$1\\arcdeg\\@ to $\\sim$4\\arcdeg\\@ from its center. In the innermost fields the average metallicity is [Fe/H] $\\sim -1$. This value decreases when we move away towards outermost regions. This is the first detection of a metallicity gradient in this galaxy. We show that the metallicity gradient is related to an age gradient, in the sense that more metal-rich stars, which are also younger, are concentrated in the ce"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0806.4465","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/0806.4465/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":"0806.4465","created_at":"2026-07-04T17:11:33.290943+00:00"},{"alias_kind":"arxiv_version","alias_value":"0806.4465v1","created_at":"2026-07-04T17:11:33.290943+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0806.4465","created_at":"2026-07-04T17:11:33.290943+00:00"},{"alias_kind":"pith_short_12","alias_value":"FGLAUTNBG4MN","created_at":"2026-07-04T17:11:33.290943+00:00"},{"alias_kind":"pith_short_16","alias_value":"FGLAUTNBG4MNTUZM","created_at":"2026-07-04T17:11:33.290943+00:00"},{"alias_kind":"pith_short_8","alias_value":"FGLAUTNB","created_at":"2026-07-04T17:11:33.290943+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/FGLAUTNBG4MNTUZMOXWD4RZVUF","json":"https://pith.science/pith/FGLAUTNBG4MNTUZMOXWD4RZVUF.json","graph_json":"https://pith.science/api/pith-number/FGLAUTNBG4MNTUZMOXWD4RZVUF/graph.json","events_json":"https://pith.science/api/pith-number/FGLAUTNBG4MNTUZMOXWD4RZVUF/events.json","paper":"https://pith.science/paper/FGLAUTNB"},"agent_actions":{"view_html":"https://pith.science/pith/FGLAUTNBG4MNTUZMOXWD4RZVUF","download_json":"https://pith.science/pith/FGLAUTNBG4MNTUZMOXWD4RZVUF.json","view_paper":"https://pith.science/paper/FGLAUTNB","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=0806.4465&json=true","fetch_graph":"https://pith.science/api/pith-number/FGLAUTNBG4MNTUZMOXWD4RZVUF/graph.json","fetch_events":"https://pith.science/api/pith-number/FGLAUTNBG4MNTUZMOXWD4RZVUF/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/FGLAUTNBG4MNTUZMOXWD4RZVUF/action/timestamp_anchor","attest_storage":"https://pith.science/pith/FGLAUTNBG4MNTUZMOXWD4RZVUF/action/storage_attestation","attest_author":"https://pith.science/pith/FGLAUTNBG4MNTUZMOXWD4RZVUF/action/author_attestation","sign_citation":"https://pith.science/pith/FGLAUTNBG4MNTUZMOXWD4RZVUF/action/citation_signature","submit_replication":"https://pith.science/pith/FGLAUTNBG4MNTUZMOXWD4RZVUF/action/replication_record"}},"created_at":"2026-07-04T17:11:33.290943+00:00","updated_at":"2026-07-04T17:11:33.290943+00:00"}