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In meteorites, a fraction of C-rich presolar grains (e.g., silicon carbide (SiC) grains of Type-X and low density graphites) are identified as relics of these events, according to the anomalous isotopic abundances. Several features of these abundances remain unexplained and challenge the understanding of core-collapse supernovae explosions and nucleosynthesis. We show, for the first time, that most of the measured C-rich grain abundances can be accounted for in the C-rich material from explosive He burning in co"},"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":"1303.3374","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2013-03-14T08:13:55Z","cross_cats_sorted":[],"title_canon_sha256":"8400f65fa073eff4834dc9f5be73ba6a268aac253285fc1b7b4ddac9134f333f","abstract_canon_sha256":"1219ee6d717877586391d26fc9b5cb644146989588b19e27cfa2e0736436d27d"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:51:07.532167Z","signature_b64":"Wkn9EkQZlPvehDpcs5vG+eF/fltlOLtmREZ1Rm5QBNgB7km5sQ5d4cM2tkTJ45YAAnu9Y52tuseMhznglAWcAQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"336b99f4df0814152c5e3c89a33989fc5828617ff845ddaabde6d9ff9274308e","last_reissued_at":"2026-05-18T01:51:07.531572Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:51:07.531572Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Production of carbon-rich presolar grains from massive stars","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.SR","authors_text":"A. 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