{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2018:J2I4DERMNDYSPMAHCRF5RK34YB","short_pith_number":"pith:J2I4DERM","schema_version":"1.0","canonical_sha256":"4e91c1922c68f127b007144bd8ab7cc06aa8714245a279a4d54942a1fecf3aae","source":{"kind":"arxiv","id":"1807.01058","version":1},"attestation_state":"computed","paper":{"title":"On the Origin of the Early Solar System Radioactivities. Problems with the AGB and Massive Star Scenarios","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.SR","authors_text":"A. Chieffi, D. Vescovi, K.-L. Kratz, L. Piersanti, M. Busso, M. Limongi, O. Trippella, P. Hoppe, S. Cristallo, S. Palmerini","submitted_at":"2018-07-03T09:55:35Z","abstract_excerpt":"Recent improvements in stellar models for intermediate-mass and massive stars are recalled, together with their expectations for the synthesis of radioactive nuclei of lifetime $\\tau \\lesssim 25$ Myr, in order to re-examine the origins of now extinct radioactivities, which were alive in the solar nebula. The Galactic inheritance broadly explains most of them, especially if $r$-process nuclei are produced by neutron star merging according to recent models. Instead, $^{26}$Al, $^{41}$Ca, $^{135}$Cs and possibly $^{60}$Fe require nucleosynthesis events close to the solar formation. We outline 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":"1807.01058","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2018-07-03T09:55:35Z","cross_cats_sorted":[],"title_canon_sha256":"34c2b001fe60bbc02a6821be1da3d2df2330aead853b8abb54a83c591e2d733c","abstract_canon_sha256":"47dd20aff7a8c7f55bdf497da2d4091ed801e712854090ed1940193d7a5969ec"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:07:49.167776Z","signature_b64":"g4SitJ+GCpbjw95HxxyWUqcodH6OVHweK3cKdReGkrnIwdu8dCwQGCpSc60/Qcr6MdB/1YvmQcSL0eAFIPCzDQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"4e91c1922c68f127b007144bd8ab7cc06aa8714245a279a4d54942a1fecf3aae","last_reissued_at":"2026-05-18T00:07:49.167025Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:07:49.167025Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"On the Origin of the Early Solar System Radioactivities. Problems with the AGB and Massive Star Scenarios","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.SR","authors_text":"A. Chieffi, D. Vescovi, K.-L. Kratz, L. Piersanti, M. Busso, M. Limongi, O. Trippella, P. Hoppe, S. Cristallo, S. Palmerini","submitted_at":"2018-07-03T09:55:35Z","abstract_excerpt":"Recent improvements in stellar models for intermediate-mass and massive stars are recalled, together with their expectations for the synthesis of radioactive nuclei of lifetime $\\tau \\lesssim 25$ Myr, in order to re-examine the origins of now extinct radioactivities, which were alive in the solar nebula. The Galactic inheritance broadly explains most of them, especially if $r$-process nuclei are produced by neutron star merging according to recent models. Instead, $^{26}$Al, $^{41}$Ca, $^{135}$Cs and possibly $^{60}$Fe require nucleosynthesis events close to the solar formation. We outline the"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1807.01058","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":""},"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":"1807.01058","created_at":"2026-05-18T00:07:49.167154+00:00"},{"alias_kind":"arxiv_version","alias_value":"1807.01058v1","created_at":"2026-05-18T00:07:49.167154+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1807.01058","created_at":"2026-05-18T00:07:49.167154+00:00"},{"alias_kind":"pith_short_12","alias_value":"J2I4DERMNDYS","created_at":"2026-05-18T12:32:31.084164+00:00"},{"alias_kind":"pith_short_16","alias_value":"J2I4DERMNDYSPMAH","created_at":"2026-05-18T12:32:31.084164+00:00"},{"alias_kind":"pith_short_8","alias_value":"J2I4DERM","created_at":"2026-05-18T12:32:31.084164+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/J2I4DERMNDYSPMAHCRF5RK34YB","json":"https://pith.science/pith/J2I4DERMNDYSPMAHCRF5RK34YB.json","graph_json":"https://pith.science/api/pith-number/J2I4DERMNDYSPMAHCRF5RK34YB/graph.json","events_json":"https://pith.science/api/pith-number/J2I4DERMNDYSPMAHCRF5RK34YB/events.json","paper":"https://pith.science/paper/J2I4DERM"},"agent_actions":{"view_html":"https://pith.science/pith/J2I4DERMNDYSPMAHCRF5RK34YB","download_json":"https://pith.science/pith/J2I4DERMNDYSPMAHCRF5RK34YB.json","view_paper":"https://pith.science/paper/J2I4DERM","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1807.01058&json=true","fetch_graph":"https://pith.science/api/pith-number/J2I4DERMNDYSPMAHCRF5RK34YB/graph.json","fetch_events":"https://pith.science/api/pith-number/J2I4DERMNDYSPMAHCRF5RK34YB/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/J2I4DERMNDYSPMAHCRF5RK34YB/action/timestamp_anchor","attest_storage":"https://pith.science/pith/J2I4DERMNDYSPMAHCRF5RK34YB/action/storage_attestation","attest_author":"https://pith.science/pith/J2I4DERMNDYSPMAHCRF5RK34YB/action/author_attestation","sign_citation":"https://pith.science/pith/J2I4DERMNDYSPMAHCRF5RK34YB/action/citation_signature","submit_replication":"https://pith.science/pith/J2I4DERMNDYSPMAHCRF5RK34YB/action/replication_record"}},"created_at":"2026-05-18T00:07:49.167154+00:00","updated_at":"2026-05-18T00:07:49.167154+00:00"}