{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2016:NRELGPJ7QZG3BLAWF5NNGIFORE","short_pith_number":"pith:NRELGPJ7","schema_version":"1.0","canonical_sha256":"6c48b33d3f864db0ac162f5ad320ae891b431452f6ec0e76d559c0ff504e4685","source":{"kind":"arxiv","id":"1604.02679","version":1},"attestation_state":"computed","paper":{"title":"First Detection of $^3$He$^+$ in the Planetary Nebula IC$\\,$418","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.GA"],"primary_cat":"astro-ph.SR","authors_text":"A. A. Zijlstra, C. Garc\\'ia-Mir\\'o, C. Morisset, J. R. Rizzo, L. Guzman-Ramirez, M. D. Gray","submitted_at":"2016-04-10T12:27:09Z","abstract_excerpt":"The $^3$He isotope is important to many fields of astrophysics, including stellar evolution, chemical evolution, and cosmology. The isotope is produced in low-mass stars which evolve through the planetary nebula (PN) phase. $^3$He abundances in PNe can help test models of the chemical evolution of the Galaxy. We present the detection of the $^3$He$^+$ emission line using the single dish Deep Space Station 63, towards the PN IC$\\,$418. We derived a $^3$He/H abundance in the range 1.74$\\pm$0.8$\\times$10$^{-3}$ to 5.8$\\pm$1.7$\\times$10$^{-3}$, depending on whether part of the line arises in an ou"},"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":"1604.02679","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2016-04-10T12:27:09Z","cross_cats_sorted":["astro-ph.GA"],"title_canon_sha256":"ff8823bfc926a0f9391351079136d7f3b646123deba75ed0ee14b7ee3226a6b8","abstract_canon_sha256":"fc811e6c91fec09a1047794078cdcb9e1be2f7ed66c8c8c003654a4dfa76a163"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:16:12.919983Z","signature_b64":"RusoyPe+lnl/+w45JTRydVh8OyE2uNBxNvzPmxe+/1tMMx8xWTVMq0bVIe22f7BUQLOexw2fP+KbLqdKiSOGBw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"6c48b33d3f864db0ac162f5ad320ae891b431452f6ec0e76d559c0ff504e4685","last_reissued_at":"2026-05-18T01:16:12.919393Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:16:12.919393Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"First Detection of $^3$He$^+$ in the Planetary Nebula IC$\\,$418","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.GA"],"primary_cat":"astro-ph.SR","authors_text":"A. A. Zijlstra, C. Garc\\'ia-Mir\\'o, C. Morisset, J. R. Rizzo, L. Guzman-Ramirez, M. D. Gray","submitted_at":"2016-04-10T12:27:09Z","abstract_excerpt":"The $^3$He isotope is important to many fields of astrophysics, including stellar evolution, chemical evolution, and cosmology. The isotope is produced in low-mass stars which evolve through the planetary nebula (PN) phase. $^3$He abundances in PNe can help test models of the chemical evolution of the Galaxy. We present the detection of the $^3$He$^+$ emission line using the single dish Deep Space Station 63, towards the PN IC$\\,$418. We derived a $^3$He/H abundance in the range 1.74$\\pm$0.8$\\times$10$^{-3}$ to 5.8$\\pm$1.7$\\times$10$^{-3}$, depending on whether part of the line arises in an ou"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1604.02679","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":"1604.02679","created_at":"2026-05-18T01:16:12.919480+00:00"},{"alias_kind":"arxiv_version","alias_value":"1604.02679v1","created_at":"2026-05-18T01:16:12.919480+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1604.02679","created_at":"2026-05-18T01:16:12.919480+00:00"},{"alias_kind":"pith_short_12","alias_value":"NRELGPJ7QZG3","created_at":"2026-05-18T12:30:36.002864+00:00"},{"alias_kind":"pith_short_16","alias_value":"NRELGPJ7QZG3BLAW","created_at":"2026-05-18T12:30:36.002864+00:00"},{"alias_kind":"pith_short_8","alias_value":"NRELGPJ7","created_at":"2026-05-18T12:30:36.002864+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/NRELGPJ7QZG3BLAWF5NNGIFORE","json":"https://pith.science/pith/NRELGPJ7QZG3BLAWF5NNGIFORE.json","graph_json":"https://pith.science/api/pith-number/NRELGPJ7QZG3BLAWF5NNGIFORE/graph.json","events_json":"https://pith.science/api/pith-number/NRELGPJ7QZG3BLAWF5NNGIFORE/events.json","paper":"https://pith.science/paper/NRELGPJ7"},"agent_actions":{"view_html":"https://pith.science/pith/NRELGPJ7QZG3BLAWF5NNGIFORE","download_json":"https://pith.science/pith/NRELGPJ7QZG3BLAWF5NNGIFORE.json","view_paper":"https://pith.science/paper/NRELGPJ7","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1604.02679&json=true","fetch_graph":"https://pith.science/api/pith-number/NRELGPJ7QZG3BLAWF5NNGIFORE/graph.json","fetch_events":"https://pith.science/api/pith-number/NRELGPJ7QZG3BLAWF5NNGIFORE/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/NRELGPJ7QZG3BLAWF5NNGIFORE/action/timestamp_anchor","attest_storage":"https://pith.science/pith/NRELGPJ7QZG3BLAWF5NNGIFORE/action/storage_attestation","attest_author":"https://pith.science/pith/NRELGPJ7QZG3BLAWF5NNGIFORE/action/author_attestation","sign_citation":"https://pith.science/pith/NRELGPJ7QZG3BLAWF5NNGIFORE/action/citation_signature","submit_replication":"https://pith.science/pith/NRELGPJ7QZG3BLAWF5NNGIFORE/action/replication_record"}},"created_at":"2026-05-18T01:16:12.919480+00:00","updated_at":"2026-05-18T01:16:12.919480+00:00"}