{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2011:YYAQQDIYYTU736NXFB7Q2DEQI5","short_pith_number":"pith:YYAQQDIY","schema_version":"1.0","canonical_sha256":"c601080d18c4e9fdf9b7287f0d0c90475485d773df2d07bbcd1325bb479c3b87","source":{"kind":"arxiv","id":"1109.1741","version":1},"attestation_state":"computed","paper":{"title":"The chemical history of molecules in circumstellar disks. II. Gas-phase species","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"((1) Leiden Observatory, 2), (2) Univ. of Michigan, (3) Denison Univ., 4), (4) MPE Garching), E.F. van Dishoeck (1, R. Visser (1, S.D. Doty (3)","submitted_at":"2011-09-08T15:12:41Z","abstract_excerpt":"Context: The chemical composition of a molecular cloud changes dramatically as it collapses to form a low-mass protostar and circumstellar disk. Two-dimensional (2D) chemodynamical models are required to properly study this process.\n  Aims: The goal of this work is to follow, for the first time, the chemical evolution in two dimensions all the way from a pre-stellar core into a circumstellar disk. Of special interest is the question whether the chemical composition of the disk is a result of chemical processing during the collapse phase, or whether it is determined by in situ processing after "},"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":"1109.1741","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2011-09-08T15:12:41Z","cross_cats_sorted":[],"title_canon_sha256":"8046e6ffee5e9211aa5958dab439254d0d4bd8e37b1c68dba175714b17cd210e","abstract_canon_sha256":"61aacf8ee9ab7d500304a9f678556f9646446275a5f35c688e7092fd52d5f906"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:00:37.847581Z","signature_b64":"GM4Wlr6oGmucW1IrmrumaCtiYBCI9ybNwByeydQbYB0SyxtZBm07jjBlmvQHOabJV1x79MAqTHQnpx9aWKpmBQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"c601080d18c4e9fdf9b7287f0d0c90475485d773df2d07bbcd1325bb479c3b87","last_reissued_at":"2026-05-18T02:00:37.847006Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:00:37.847006Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"The chemical history of molecules in circumstellar disks. II. Gas-phase species","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"((1) Leiden Observatory, 2), (2) Univ. of Michigan, (3) Denison Univ., 4), (4) MPE Garching), E.F. van Dishoeck (1, R. Visser (1, S.D. Doty (3)","submitted_at":"2011-09-08T15:12:41Z","abstract_excerpt":"Context: The chemical composition of a molecular cloud changes dramatically as it collapses to form a low-mass protostar and circumstellar disk. Two-dimensional (2D) chemodynamical models are required to properly study this process.\n  Aims: The goal of this work is to follow, for the first time, the chemical evolution in two dimensions all the way from a pre-stellar core into a circumstellar disk. Of special interest is the question whether the chemical composition of the disk is a result of chemical processing during the collapse phase, or whether it is determined by in situ processing after "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1109.1741","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":"1109.1741","created_at":"2026-05-18T02:00:37.847085+00:00"},{"alias_kind":"arxiv_version","alias_value":"1109.1741v1","created_at":"2026-05-18T02:00:37.847085+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1109.1741","created_at":"2026-05-18T02:00:37.847085+00:00"},{"alias_kind":"pith_short_12","alias_value":"YYAQQDIYYTU7","created_at":"2026-05-18T12:26:47.523578+00:00"},{"alias_kind":"pith_short_16","alias_value":"YYAQQDIYYTU736NX","created_at":"2026-05-18T12:26:47.523578+00:00"},{"alias_kind":"pith_short_8","alias_value":"YYAQQDIY","created_at":"2026-05-18T12:26:47.523578+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/YYAQQDIYYTU736NXFB7Q2DEQI5","json":"https://pith.science/pith/YYAQQDIYYTU736NXFB7Q2DEQI5.json","graph_json":"https://pith.science/api/pith-number/YYAQQDIYYTU736NXFB7Q2DEQI5/graph.json","events_json":"https://pith.science/api/pith-number/YYAQQDIYYTU736NXFB7Q2DEQI5/events.json","paper":"https://pith.science/paper/YYAQQDIY"},"agent_actions":{"view_html":"https://pith.science/pith/YYAQQDIYYTU736NXFB7Q2DEQI5","download_json":"https://pith.science/pith/YYAQQDIYYTU736NXFB7Q2DEQI5.json","view_paper":"https://pith.science/paper/YYAQQDIY","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1109.1741&json=true","fetch_graph":"https://pith.science/api/pith-number/YYAQQDIYYTU736NXFB7Q2DEQI5/graph.json","fetch_events":"https://pith.science/api/pith-number/YYAQQDIYYTU736NXFB7Q2DEQI5/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/YYAQQDIYYTU736NXFB7Q2DEQI5/action/timestamp_anchor","attest_storage":"https://pith.science/pith/YYAQQDIYYTU736NXFB7Q2DEQI5/action/storage_attestation","attest_author":"https://pith.science/pith/YYAQQDIYYTU736NXFB7Q2DEQI5/action/author_attestation","sign_citation":"https://pith.science/pith/YYAQQDIYYTU736NXFB7Q2DEQI5/action/citation_signature","submit_replication":"https://pith.science/pith/YYAQQDIYYTU736NXFB7Q2DEQI5/action/replication_record"}},"created_at":"2026-05-18T02:00:37.847085+00:00","updated_at":"2026-05-18T02:00:37.847085+00:00"}