{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2016:TNSPKBAR5RBRPOOAUYJINGBGDK","short_pith_number":"pith:TNSPKBAR","schema_version":"1.0","canonical_sha256":"9b64f50411ec4317b9c0a6128698261ab8c591f8a8e8de6d2adba6b16c2ef186","source":{"kind":"arxiv","id":"1601.04969","version":1},"attestation_state":"computed","paper":{"title":"The kinematics of the nebular shells around low mass progenitors of PNe with low metallicity","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.GA"],"primary_cat":"astro-ph.SR","authors_text":"Jos\\'e Alberto L\\'opez, Margarita Pereyra, Michael G. Richer","submitted_at":"2016-01-19T16:08:06Z","abstract_excerpt":"We analyze the internal kinematics of 26 Planetary Nebulae (PNe) with low metallicity that appear to derive from progenitor stars of the lowest masses, including the halo PN population. Based upon spatially-resolved, long-slit, echelle spectroscopy drawn from the San Pedro M\\'artir Kinematic Catalogue of PNe (L\\'opez et al. 2012), we characterize the kinematics of these PNe measuring their global expansion velocities based upon the largest sample used to date for this purpose. We find kinematics that follow the trends observed and predicted in other studies, but also find that most of the PNe "},"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":"1601.04969","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2016-01-19T16:08:06Z","cross_cats_sorted":["astro-ph.GA"],"title_canon_sha256":"38fa3a42ed49c5b3a2b674d84755a4bdae1ebedf5eb7ae7e0a3df7f2a20ef9c1","abstract_canon_sha256":"2ac79960efc176399530c6f6f58a8401d4dc9aa55e7e2e5e462e4f54017c327a"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:20:32.097577Z","signature_b64":"tjJLjPrU18EhCBa9/WvQAiddwxWVb3WyM4qvdVeOfVikmHzCuCZu1UpakBf2DlS/7Pa0+jHeBBHH6NVKs1QxDQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"9b64f50411ec4317b9c0a6128698261ab8c591f8a8e8de6d2adba6b16c2ef186","last_reissued_at":"2026-05-18T01:20:32.097104Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:20:32.097104Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"The kinematics of the nebular shells around low mass progenitors of PNe with low metallicity","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.GA"],"primary_cat":"astro-ph.SR","authors_text":"Jos\\'e Alberto L\\'opez, Margarita Pereyra, Michael G. Richer","submitted_at":"2016-01-19T16:08:06Z","abstract_excerpt":"We analyze the internal kinematics of 26 Planetary Nebulae (PNe) with low metallicity that appear to derive from progenitor stars of the lowest masses, including the halo PN population. Based upon spatially-resolved, long-slit, echelle spectroscopy drawn from the San Pedro M\\'artir Kinematic Catalogue of PNe (L\\'opez et al. 2012), we characterize the kinematics of these PNe measuring their global expansion velocities based upon the largest sample used to date for this purpose. We find kinematics that follow the trends observed and predicted in other studies, but also find that most of the PNe "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1601.04969","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":"1601.04969","created_at":"2026-05-18T01:20:32.097177+00:00"},{"alias_kind":"arxiv_version","alias_value":"1601.04969v1","created_at":"2026-05-18T01:20:32.097177+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1601.04969","created_at":"2026-05-18T01:20:32.097177+00:00"},{"alias_kind":"pith_short_12","alias_value":"TNSPKBAR5RBR","created_at":"2026-05-18T12:30:46.583412+00:00"},{"alias_kind":"pith_short_16","alias_value":"TNSPKBAR5RBRPOOA","created_at":"2026-05-18T12:30:46.583412+00:00"},{"alias_kind":"pith_short_8","alias_value":"TNSPKBAR","created_at":"2026-05-18T12:30:46.583412+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/TNSPKBAR5RBRPOOAUYJINGBGDK","json":"https://pith.science/pith/TNSPKBAR5RBRPOOAUYJINGBGDK.json","graph_json":"https://pith.science/api/pith-number/TNSPKBAR5RBRPOOAUYJINGBGDK/graph.json","events_json":"https://pith.science/api/pith-number/TNSPKBAR5RBRPOOAUYJINGBGDK/events.json","paper":"https://pith.science/paper/TNSPKBAR"},"agent_actions":{"view_html":"https://pith.science/pith/TNSPKBAR5RBRPOOAUYJINGBGDK","download_json":"https://pith.science/pith/TNSPKBAR5RBRPOOAUYJINGBGDK.json","view_paper":"https://pith.science/paper/TNSPKBAR","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1601.04969&json=true","fetch_graph":"https://pith.science/api/pith-number/TNSPKBAR5RBRPOOAUYJINGBGDK/graph.json","fetch_events":"https://pith.science/api/pith-number/TNSPKBAR5RBRPOOAUYJINGBGDK/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/TNSPKBAR5RBRPOOAUYJINGBGDK/action/timestamp_anchor","attest_storage":"https://pith.science/pith/TNSPKBAR5RBRPOOAUYJINGBGDK/action/storage_attestation","attest_author":"https://pith.science/pith/TNSPKBAR5RBRPOOAUYJINGBGDK/action/author_attestation","sign_citation":"https://pith.science/pith/TNSPKBAR5RBRPOOAUYJINGBGDK/action/citation_signature","submit_replication":"https://pith.science/pith/TNSPKBAR5RBRPOOAUYJINGBGDK/action/replication_record"}},"created_at":"2026-05-18T01:20:32.097177+00:00","updated_at":"2026-05-18T01:20:32.097177+00:00"}