{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2016:FK74KLHV4XCV6MEFNWINADRYBL","short_pith_number":"pith:FK74KLHV","schema_version":"1.0","canonical_sha256":"2abfc52cf5e5c55f30856d90d00e380af4b0455e7b6c77245497b16d7cd41e21","source":{"kind":"arxiv","id":"1603.08930","version":1},"attestation_state":"computed","paper":{"title":"Probing Planet Forming Zones with Rare CO Isotopologues","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.EP","authors_text":"Karen Willacy, Mo Yu, Neal J. Evans II, Neal J. Turner, Sarah E. Dodson-Robinson","submitted_at":"2016-03-29T20:00:05Z","abstract_excerpt":"The gas near the midplanes of planet-forming protostellar disks remains largely unprobed by observations due to the high optical depth of commonly observed molecules such as CO and H$_2$O. However, rotational emission lines from rare molecules may have optical depths near unity in the vertical direction, so that the lines are strong enough to be detected, yet remain transparent enough to trace the disk midplane. Here we present a chemical model of an evolving T-Tauri disk and predict the optical depths of rotational transitions of $^{12}$C$^{16}$O, $^{13}$C$^{16}$O, $^{12}$C$^{17}$O and $^{12}"},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"1603.08930","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2016-03-29T20:00:05Z","cross_cats_sorted":[],"title_canon_sha256":"9861d47bea009d5b8889f3d6b28e57b27805011e4f46c09922d9d047826e04f8","abstract_canon_sha256":"5343eda00122b63b60a85b579c1c60be9e2debbe117c2bb88d319569ba9eeb35"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:13:53.450623Z","signature_b64":"/hiBRgwAcDtxL1Ex2ly8AO2VYqOE8KOc4R4ddB19yhkjjeJyyAHSz6NjyotpcpqCvJhZBbnXQDXRCDSEiNyIDQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"2abfc52cf5e5c55f30856d90d00e380af4b0455e7b6c77245497b16d7cd41e21","last_reissued_at":"2026-05-18T01:13:53.449661Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:13:53.449661Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Probing Planet Forming Zones with Rare CO Isotopologues","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.EP","authors_text":"Karen Willacy, Mo Yu, Neal J. Evans II, Neal J. Turner, Sarah E. Dodson-Robinson","submitted_at":"2016-03-29T20:00:05Z","abstract_excerpt":"The gas near the midplanes of planet-forming protostellar disks remains largely unprobed by observations due to the high optical depth of commonly observed molecules such as CO and H$_2$O. However, rotational emission lines from rare molecules may have optical depths near unity in the vertical direction, so that the lines are strong enough to be detected, yet remain transparent enough to trace the disk midplane. Here we present a chemical model of an evolving T-Tauri disk and predict the optical depths of rotational transitions of $^{12}$C$^{16}$O, $^{13}$C$^{16}$O, $^{12}$C$^{17}$O and $^{12}"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1603.08930","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":"1603.08930","created_at":"2026-05-18T01:13:53.449839+00:00"},{"alias_kind":"arxiv_version","alias_value":"1603.08930v1","created_at":"2026-05-18T01:13:53.449839+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1603.08930","created_at":"2026-05-18T01:13:53.449839+00:00"},{"alias_kind":"pith_short_12","alias_value":"FK74KLHV4XCV","created_at":"2026-05-18T12:30:15.759754+00:00"},{"alias_kind":"pith_short_16","alias_value":"FK74KLHV4XCV6MEF","created_at":"2026-05-18T12:30:15.759754+00:00"},{"alias_kind":"pith_short_8","alias_value":"FK74KLHV","created_at":"2026-05-18T12:30:15.759754+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/FK74KLHV4XCV6MEFNWINADRYBL","json":"https://pith.science/pith/FK74KLHV4XCV6MEFNWINADRYBL.json","graph_json":"https://pith.science/api/pith-number/FK74KLHV4XCV6MEFNWINADRYBL/graph.json","events_json":"https://pith.science/api/pith-number/FK74KLHV4XCV6MEFNWINADRYBL/events.json","paper":"https://pith.science/paper/FK74KLHV"},"agent_actions":{"view_html":"https://pith.science/pith/FK74KLHV4XCV6MEFNWINADRYBL","download_json":"https://pith.science/pith/FK74KLHV4XCV6MEFNWINADRYBL.json","view_paper":"https://pith.science/paper/FK74KLHV","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1603.08930&json=true","fetch_graph":"https://pith.science/api/pith-number/FK74KLHV4XCV6MEFNWINADRYBL/graph.json","fetch_events":"https://pith.science/api/pith-number/FK74KLHV4XCV6MEFNWINADRYBL/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/FK74KLHV4XCV6MEFNWINADRYBL/action/timestamp_anchor","attest_storage":"https://pith.science/pith/FK74KLHV4XCV6MEFNWINADRYBL/action/storage_attestation","attest_author":"https://pith.science/pith/FK74KLHV4XCV6MEFNWINADRYBL/action/author_attestation","sign_citation":"https://pith.science/pith/FK74KLHV4XCV6MEFNWINADRYBL/action/citation_signature","submit_replication":"https://pith.science/pith/FK74KLHV4XCV6MEFNWINADRYBL/action/replication_record"}},"created_at":"2026-05-18T01:13:53.449839+00:00","updated_at":"2026-05-18T01:13:53.449839+00:00"}