{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2010:IGGWNSRLRNISFTJF2V5JWZ5NGB","short_pith_number":"pith:IGGWNSRL","schema_version":"1.0","canonical_sha256":"418d66ca2b8b5122cd25d57a9b67ad3072cbb2bac33d558a8ad5dcc72fdc585b","source":{"kind":"arxiv","id":"1012.5658","version":2},"attestation_state":"computed","paper":{"title":"Are Proto-Planetary Nebulae Shaped by a Binary? Results of a Long-Term Radial Velocity Study","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.SR","authors_text":"Andrew W. Woodsworth, Bruce J. Hrivnak, C. D. Scarfe, David Bohlender, Katrina Loewe Wefel, S. C. Morris, Wenxian Lu","submitted_at":"2010-12-27T20:47:25Z","abstract_excerpt":"The shaping of the nebula is currently one of the outstanding unsolved problems in planetary nebula (PN) research. Several mechanisms have been proposed, most of which require a binary companion. However, direct evidence for a binary companion is lacking in most PNs. We have addressed this problem by obtaining precise radial velocities of seven bright proto-planetary nebulae (PPNs), objects in transition from the asymptotic giant branch to the PN phases of stellar evolution. These have F-G spectral types and have the advantage over PNs of having more and sharper spectral lines, leading to bett"},"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":"1012.5658","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2010-12-27T20:47:25Z","cross_cats_sorted":[],"title_canon_sha256":"5a492ad6c9f04d2ad3b7ee9f14c68ba489f1254ac07b51f47a53f9fb66cb55d5","abstract_canon_sha256":"027ff63e3754f6040280f3cecb013964053a06a49d53dabeee8099cdb8224ce8"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:04:17.404837Z","signature_b64":"ynluoD1LuxZz+Bnt0WMUCV5ytoW/Eq318JxUoOm7J57cRgyzZTciJfkVyJWtxI3rr6gawe901kzxRqqZds6yCA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"418d66ca2b8b5122cd25d57a9b67ad3072cbb2bac33d558a8ad5dcc72fdc585b","last_reissued_at":"2026-05-18T02:04:17.404401Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:04:17.404401Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Are Proto-Planetary Nebulae Shaped by a Binary? Results of a Long-Term Radial Velocity Study","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.SR","authors_text":"Andrew W. Woodsworth, Bruce J. Hrivnak, C. D. Scarfe, David Bohlender, Katrina Loewe Wefel, S. C. Morris, Wenxian Lu","submitted_at":"2010-12-27T20:47:25Z","abstract_excerpt":"The shaping of the nebula is currently one of the outstanding unsolved problems in planetary nebula (PN) research. Several mechanisms have been proposed, most of which require a binary companion. However, direct evidence for a binary companion is lacking in most PNs. We have addressed this problem by obtaining precise radial velocities of seven bright proto-planetary nebulae (PPNs), objects in transition from the asymptotic giant branch to the PN phases of stellar evolution. These have F-G spectral types and have the advantage over PNs of having more and sharper spectral lines, leading to bett"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1012.5658","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":"1012.5658","created_at":"2026-05-18T02:04:17.404464+00:00"},{"alias_kind":"arxiv_version","alias_value":"1012.5658v2","created_at":"2026-05-18T02:04:17.404464+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1012.5658","created_at":"2026-05-18T02:04:17.404464+00:00"},{"alias_kind":"pith_short_12","alias_value":"IGGWNSRLRNIS","created_at":"2026-05-18T12:26:09.077623+00:00"},{"alias_kind":"pith_short_16","alias_value":"IGGWNSRLRNISFTJF","created_at":"2026-05-18T12:26:09.077623+00:00"},{"alias_kind":"pith_short_8","alias_value":"IGGWNSRL","created_at":"2026-05-18T12:26:09.077623+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/IGGWNSRLRNISFTJF2V5JWZ5NGB","json":"https://pith.science/pith/IGGWNSRLRNISFTJF2V5JWZ5NGB.json","graph_json":"https://pith.science/api/pith-number/IGGWNSRLRNISFTJF2V5JWZ5NGB/graph.json","events_json":"https://pith.science/api/pith-number/IGGWNSRLRNISFTJF2V5JWZ5NGB/events.json","paper":"https://pith.science/paper/IGGWNSRL"},"agent_actions":{"view_html":"https://pith.science/pith/IGGWNSRLRNISFTJF2V5JWZ5NGB","download_json":"https://pith.science/pith/IGGWNSRLRNISFTJF2V5JWZ5NGB.json","view_paper":"https://pith.science/paper/IGGWNSRL","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1012.5658&json=true","fetch_graph":"https://pith.science/api/pith-number/IGGWNSRLRNISFTJF2V5JWZ5NGB/graph.json","fetch_events":"https://pith.science/api/pith-number/IGGWNSRLRNISFTJF2V5JWZ5NGB/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/IGGWNSRLRNISFTJF2V5JWZ5NGB/action/timestamp_anchor","attest_storage":"https://pith.science/pith/IGGWNSRLRNISFTJF2V5JWZ5NGB/action/storage_attestation","attest_author":"https://pith.science/pith/IGGWNSRLRNISFTJF2V5JWZ5NGB/action/author_attestation","sign_citation":"https://pith.science/pith/IGGWNSRLRNISFTJF2V5JWZ5NGB/action/citation_signature","submit_replication":"https://pith.science/pith/IGGWNSRLRNISFTJF2V5JWZ5NGB/action/replication_record"}},"created_at":"2026-05-18T02:04:17.404464+00:00","updated_at":"2026-05-18T02:04:17.404464+00:00"}