{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2021:W2ASQVRJNR236WEB7JAZHMNZBE","short_pith_number":"pith:W2ASQVRJ","schema_version":"1.0","canonical_sha256":"b6812856296c75bf5881fa4193b1b9091f04033353e6ae8e12dfd790a33f5f6d","source":{"kind":"arxiv","id":"2107.02518","version":1},"attestation_state":"computed","paper":{"title":"Theoretical predictions of surface light element abundances in protostellar and pre-Main Sequence phase","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.SR","authors_text":"A. Chiavassa, A. Tumino, C. Spitaleri, E. Tognelli, L. Lamia, P.G. Prada Moroni, R.G. Pizzone, S. Degl'Innocenti","submitted_at":"2021-07-06T10:22:33Z","abstract_excerpt":"Theoretical prediction of surface stellar abundances of light elements -- lithium, beryllium, and boron -- represents one of the most interesting open problems in astrophysics. As well known, several measurements of 7-Li abundances in stellar atmospheres point out a disagreement between predictions and observations in different stellar evolutionary phases, rising doubts about the capability of present stellar models to precisely reproduce stellar envelope characteristics. Light elements are burned at relatively low temperatures (from 2 to 5 MK) and thus in the evolutionary stages of a star the"},"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":"2107.02518","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.SR","submitted_at":"2021-07-06T10:22:33Z","cross_cats_sorted":[],"title_canon_sha256":"49b684e9a4cb9f0818f8cd736844fb2d65bea8311d7bcb8769d5a20bb1d43cb0","abstract_canon_sha256":"3236c5d28b849da48988bd2c6deb9bee841226664097532d5f670d24afa42d33"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T02:55:21.675222Z","signature_b64":"/0Cg1DHiW61kjJ4fD97K+lxD65khqZdt3+I25NRhobdiQXVKJpvCEfQs7iwbG25Fc8Bj/FnSxY53tH4dsi83DQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"b6812856296c75bf5881fa4193b1b9091f04033353e6ae8e12dfd790a33f5f6d","last_reissued_at":"2026-07-05T02:55:21.674740Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T02:55:21.674740Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Theoretical predictions of surface light element abundances in protostellar and pre-Main Sequence phase","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.SR","authors_text":"A. Chiavassa, A. Tumino, C. Spitaleri, E. Tognelli, L. Lamia, P.G. Prada Moroni, R.G. Pizzone, S. Degl'Innocenti","submitted_at":"2021-07-06T10:22:33Z","abstract_excerpt":"Theoretical prediction of surface stellar abundances of light elements -- lithium, beryllium, and boron -- represents one of the most interesting open problems in astrophysics. As well known, several measurements of 7-Li abundances in stellar atmospheres point out a disagreement between predictions and observations in different stellar evolutionary phases, rising doubts about the capability of present stellar models to precisely reproduce stellar envelope characteristics. Light elements are burned at relatively low temperatures (from 2 to 5 MK) and thus in the evolutionary stages of a star the"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2107.02518","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/2107.02518/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":"2107.02518","created_at":"2026-07-05T02:55:21.674798+00:00"},{"alias_kind":"arxiv_version","alias_value":"2107.02518v1","created_at":"2026-07-05T02:55:21.674798+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2107.02518","created_at":"2026-07-05T02:55:21.674798+00:00"},{"alias_kind":"pith_short_12","alias_value":"W2ASQVRJNR23","created_at":"2026-07-05T02:55:21.674798+00:00"},{"alias_kind":"pith_short_16","alias_value":"W2ASQVRJNR236WEB","created_at":"2026-07-05T02:55:21.674798+00:00"},{"alias_kind":"pith_short_8","alias_value":"W2ASQVRJ","created_at":"2026-07-05T02:55:21.674798+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/W2ASQVRJNR236WEB7JAZHMNZBE","json":"https://pith.science/pith/W2ASQVRJNR236WEB7JAZHMNZBE.json","graph_json":"https://pith.science/api/pith-number/W2ASQVRJNR236WEB7JAZHMNZBE/graph.json","events_json":"https://pith.science/api/pith-number/W2ASQVRJNR236WEB7JAZHMNZBE/events.json","paper":"https://pith.science/paper/W2ASQVRJ"},"agent_actions":{"view_html":"https://pith.science/pith/W2ASQVRJNR236WEB7JAZHMNZBE","download_json":"https://pith.science/pith/W2ASQVRJNR236WEB7JAZHMNZBE.json","view_paper":"https://pith.science/paper/W2ASQVRJ","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=2107.02518&json=true","fetch_graph":"https://pith.science/api/pith-number/W2ASQVRJNR236WEB7JAZHMNZBE/graph.json","fetch_events":"https://pith.science/api/pith-number/W2ASQVRJNR236WEB7JAZHMNZBE/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/W2ASQVRJNR236WEB7JAZHMNZBE/action/timestamp_anchor","attest_storage":"https://pith.science/pith/W2ASQVRJNR236WEB7JAZHMNZBE/action/storage_attestation","attest_author":"https://pith.science/pith/W2ASQVRJNR236WEB7JAZHMNZBE/action/author_attestation","sign_citation":"https://pith.science/pith/W2ASQVRJNR236WEB7JAZHMNZBE/action/citation_signature","submit_replication":"https://pith.science/pith/W2ASQVRJNR236WEB7JAZHMNZBE/action/replication_record"}},"created_at":"2026-07-05T02:55:21.674798+00:00","updated_at":"2026-07-05T02:55:21.674798+00:00"}