{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2009:HP3ZTKOFH3I3P4HZSLAMR5MUR3","short_pith_number":"pith:HP3ZTKOF","schema_version":"1.0","canonical_sha256":"3bf799a9c53ed1b7f0f992c0c8f5948ed859cc3a43ebdec277ea272ec596358b","source":{"kind":"arxiv","id":"0911.2271","version":1},"attestation_state":"computed","paper":{"title":"Observational diagnostics of gas in protoplanetary disks","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.SR","authors_text":"Andres Carmona","submitted_at":"2009-11-11T23:37:30Z","abstract_excerpt":"Protoplanetary disks are composed primarily of gas (99% of the mass). Nevertheless, relatively few observational constraints exist for the gas in disks. In this review, I discuss several observational diagnostics in the UV, optical, near-IR, mid-IR, and (sub)-mm wavelengths that have been employed to study the gas in the disks of young stellar objects. I concentrate in diagnostics that probe the inner 20 AU of the disk, the region where planets are expected to form. I discuss the potential and limitations of each gas tracer and present prospects for future research."},"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":"0911.2271","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2009-11-11T23:37:30Z","cross_cats_sorted":[],"title_canon_sha256":"33a4134ebb39f0b6155d05a3f9f34ae3d0b41183013bd017cb3388a84637d188","abstract_canon_sha256":"ef2bac03120c246b59b2f05215c5c0eaee303981c0caa8d5a0af941939bc5fa3"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:10:48.513177Z","signature_b64":"mu+L0aU9p1UCaVIRmBqGP5uuholmA4kDjtOcVtsIR6y2pgjI7HLRkuQanhZf7ZySFgrhRmaFqD/C431ezZGoBw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"3bf799a9c53ed1b7f0f992c0c8f5948ed859cc3a43ebdec277ea272ec596358b","last_reissued_at":"2026-05-18T02:10:48.512420Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:10:48.512420Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Observational diagnostics of gas in protoplanetary disks","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.SR","authors_text":"Andres Carmona","submitted_at":"2009-11-11T23:37:30Z","abstract_excerpt":"Protoplanetary disks are composed primarily of gas (99% of the mass). Nevertheless, relatively few observational constraints exist for the gas in disks. In this review, I discuss several observational diagnostics in the UV, optical, near-IR, mid-IR, and (sub)-mm wavelengths that have been employed to study the gas in the disks of young stellar objects. I concentrate in diagnostics that probe the inner 20 AU of the disk, the region where planets are expected to form. I discuss the potential and limitations of each gas tracer and present prospects for future research."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0911.2271","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":"0911.2271","created_at":"2026-05-18T02:10:48.512564+00:00"},{"alias_kind":"arxiv_version","alias_value":"0911.2271v1","created_at":"2026-05-18T02:10:48.512564+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0911.2271","created_at":"2026-05-18T02:10:48.512564+00:00"},{"alias_kind":"pith_short_12","alias_value":"HP3ZTKOFH3I3","created_at":"2026-05-18T12:25:59.703012+00:00"},{"alias_kind":"pith_short_16","alias_value":"HP3ZTKOFH3I3P4HZ","created_at":"2026-05-18T12:25:59.703012+00:00"},{"alias_kind":"pith_short_8","alias_value":"HP3ZTKOF","created_at":"2026-05-18T12:25:59.703012+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/HP3ZTKOFH3I3P4HZSLAMR5MUR3","json":"https://pith.science/pith/HP3ZTKOFH3I3P4HZSLAMR5MUR3.json","graph_json":"https://pith.science/api/pith-number/HP3ZTKOFH3I3P4HZSLAMR5MUR3/graph.json","events_json":"https://pith.science/api/pith-number/HP3ZTKOFH3I3P4HZSLAMR5MUR3/events.json","paper":"https://pith.science/paper/HP3ZTKOF"},"agent_actions":{"view_html":"https://pith.science/pith/HP3ZTKOFH3I3P4HZSLAMR5MUR3","download_json":"https://pith.science/pith/HP3ZTKOFH3I3P4HZSLAMR5MUR3.json","view_paper":"https://pith.science/paper/HP3ZTKOF","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=0911.2271&json=true","fetch_graph":"https://pith.science/api/pith-number/HP3ZTKOFH3I3P4HZSLAMR5MUR3/graph.json","fetch_events":"https://pith.science/api/pith-number/HP3ZTKOFH3I3P4HZSLAMR5MUR3/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/HP3ZTKOFH3I3P4HZSLAMR5MUR3/action/timestamp_anchor","attest_storage":"https://pith.science/pith/HP3ZTKOFH3I3P4HZSLAMR5MUR3/action/storage_attestation","attest_author":"https://pith.science/pith/HP3ZTKOFH3I3P4HZSLAMR5MUR3/action/author_attestation","sign_citation":"https://pith.science/pith/HP3ZTKOFH3I3P4HZSLAMR5MUR3/action/citation_signature","submit_replication":"https://pith.science/pith/HP3ZTKOFH3I3P4HZSLAMR5MUR3/action/replication_record"}},"created_at":"2026-05-18T02:10:48.512564+00:00","updated_at":"2026-05-18T02:10:48.512564+00:00"}