{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2011:FWZHGZR2OS55BUPIWVKKOUY5GD","short_pith_number":"pith:FWZHGZR2","schema_version":"1.0","canonical_sha256":"2db273663a74bbd0d1e8b554a7531d30ecdc8064d5a4b180591e09680dedd408","source":{"kind":"arxiv","id":"1102.4913","version":2},"attestation_state":"computed","paper":{"title":"Single-degenerate type Ia supernovae without hydrogen contamination","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.HE"],"primary_cat":"astro-ph.SR","authors_text":"Stephen Justham (KIAA)","submitted_at":"2011-02-24T07:07:15Z","abstract_excerpt":"The lack of hydrogen in spectra of type Ia supernovae (SN Ia) is often seen as troublesome for single-degenerate (SD) progenitor models. We argue that, since continued accretion of angular momentum can prevent explosion of the white dwarf, it may be natural for the donor stars in SD progenitors of SN Ia to exhaust their envelopes and shrink rapidly before the explosion. This outcome seems most likely for SD SN Ia progenitors where mass-transfer begins from a giant donor star, and might extend to other SD systems. Not only is the amount of hydrogen left in such a system below the current detect"},"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":"1102.4913","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2011-02-24T07:07:15Z","cross_cats_sorted":["astro-ph.HE"],"title_canon_sha256":"767ad89dd4ecd9f434bcadd2dbe241ec7f6d81c9cd75c9f6fab484295ba845bb","abstract_canon_sha256":"338136e77aa471cc3d1ae47661a011f4764de3122fb7dfc18085a6600952f9e4"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:03:05.631956Z","signature_b64":"ZjfSCkfAdCT8KUtev6mTt+kuGAVpBIenCFjRSzK1IoqQ8Q2TwaUMm1tL7MReRyNsuO6jSFHz7tnePUlCJKv1AA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"2db273663a74bbd0d1e8b554a7531d30ecdc8064d5a4b180591e09680dedd408","last_reissued_at":"2026-05-18T02:03:05.631259Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:03:05.631259Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Single-degenerate type Ia supernovae without hydrogen contamination","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.HE"],"primary_cat":"astro-ph.SR","authors_text":"Stephen Justham (KIAA)","submitted_at":"2011-02-24T07:07:15Z","abstract_excerpt":"The lack of hydrogen in spectra of type Ia supernovae (SN Ia) is often seen as troublesome for single-degenerate (SD) progenitor models. We argue that, since continued accretion of angular momentum can prevent explosion of the white dwarf, it may be natural for the donor stars in SD progenitors of SN Ia to exhaust their envelopes and shrink rapidly before the explosion. This outcome seems most likely for SD SN Ia progenitors where mass-transfer begins from a giant donor star, and might extend to other SD systems. Not only is the amount of hydrogen left in such a system below the current detect"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1102.4913","kind":"arxiv","version":2},"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":"1102.4913","created_at":"2026-05-18T02:03:05.631383+00:00"},{"alias_kind":"arxiv_version","alias_value":"1102.4913v2","created_at":"2026-05-18T02:03:05.631383+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1102.4913","created_at":"2026-05-18T02:03:05.631383+00:00"},{"alias_kind":"pith_short_12","alias_value":"FWZHGZR2OS55","created_at":"2026-05-18T12:26:28.662955+00:00"},{"alias_kind":"pith_short_16","alias_value":"FWZHGZR2OS55BUPI","created_at":"2026-05-18T12:26:28.662955+00:00"},{"alias_kind":"pith_short_8","alias_value":"FWZHGZR2","created_at":"2026-05-18T12:26:28.662955+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":1,"internal_anchor_count":1,"sample":[{"citing_arxiv_id":"2411.09740","citing_title":"Type Ia supernovae","ref_index":45,"is_internal_anchor":true}]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/FWZHGZR2OS55BUPIWVKKOUY5GD","json":"https://pith.science/pith/FWZHGZR2OS55BUPIWVKKOUY5GD.json","graph_json":"https://pith.science/api/pith-number/FWZHGZR2OS55BUPIWVKKOUY5GD/graph.json","events_json":"https://pith.science/api/pith-number/FWZHGZR2OS55BUPIWVKKOUY5GD/events.json","paper":"https://pith.science/paper/FWZHGZR2"},"agent_actions":{"view_html":"https://pith.science/pith/FWZHGZR2OS55BUPIWVKKOUY5GD","download_json":"https://pith.science/pith/FWZHGZR2OS55BUPIWVKKOUY5GD.json","view_paper":"https://pith.science/paper/FWZHGZR2","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1102.4913&json=true","fetch_graph":"https://pith.science/api/pith-number/FWZHGZR2OS55BUPIWVKKOUY5GD/graph.json","fetch_events":"https://pith.science/api/pith-number/FWZHGZR2OS55BUPIWVKKOUY5GD/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/FWZHGZR2OS55BUPIWVKKOUY5GD/action/timestamp_anchor","attest_storage":"https://pith.science/pith/FWZHGZR2OS55BUPIWVKKOUY5GD/action/storage_attestation","attest_author":"https://pith.science/pith/FWZHGZR2OS55BUPIWVKKOUY5GD/action/author_attestation","sign_citation":"https://pith.science/pith/FWZHGZR2OS55BUPIWVKKOUY5GD/action/citation_signature","submit_replication":"https://pith.science/pith/FWZHGZR2OS55BUPIWVKKOUY5GD/action/replication_record"}},"created_at":"2026-05-18T02:03:05.631383+00:00","updated_at":"2026-05-18T02:03:05.631383+00:00"}