{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2017:7VLML77HTPTN4VCVIICS6VAHGF","short_pith_number":"pith:7VLML77H","schema_version":"1.0","canonical_sha256":"fd56c5ffe79be6de545542052f5407314986c2e56a648dc117985afbec4e3a08","source":{"kind":"arxiv","id":"1703.03748","version":1},"attestation_state":"computed","paper":{"title":"On the methanol emission detection in the TW Hya disc: the role of grain surface chemistry and non-LTE excitation","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.GA"],"primary_cat":"astro-ph.SR","authors_text":"A. M. Sobolev, A. S. Shapovalova, D. A. Semenov, R. Teague, S. Yu. Parfenov, Th. Henning","submitted_at":"2017-03-10T16:25:43Z","abstract_excerpt":"The recent detection of gas-phase methanol (CH$_3$OH) lines in the disc of TW Hya by Walsh et al. provided the first observational constraints on the complex O-bearing organic content in protoplanetary discs. The emission has a ring-like morphology, with a peak at $\\sim 30-50$ au and an inferred column density of $\\sim 3-6\\times10^{12}$ cm$^{-2}$. A low CH$_3$OH fractional abundance of $\\sim 0.3-4\\times 10^{-11}$ (with respect to H$_2$) is derived, depending on the assumed vertical location of the CH$_3$OH molecular layer. In this study, we use a thermo-chemical model of the TW Hya disc, coupl"},"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":"1703.03748","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2017-03-10T16:25:43Z","cross_cats_sorted":["astro-ph.GA"],"title_canon_sha256":"9afb735ac756f04e598808c9e7454cfcca0f3733324404989ca3f8c17f4850eb","abstract_canon_sha256":"34b19a179cfa94f739fb9dbd6710e8440e60440d5e59a4e4e605077ffc747a71"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:48:53.062343Z","signature_b64":"jbKa+SwZtH/8geJnFV9oayIx3Pse7nqgYeAdV4UqFW8QsiF0ueV6KK0d2+wLEulix7QrsesZP6H2phacygrlAg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"fd56c5ffe79be6de545542052f5407314986c2e56a648dc117985afbec4e3a08","last_reissued_at":"2026-05-18T00:48:53.061777Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:48:53.061777Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"On the methanol emission detection in the TW Hya disc: the role of grain surface chemistry and non-LTE excitation","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.GA"],"primary_cat":"astro-ph.SR","authors_text":"A. M. Sobolev, A. S. Shapovalova, D. A. Semenov, R. Teague, S. Yu. Parfenov, Th. Henning","submitted_at":"2017-03-10T16:25:43Z","abstract_excerpt":"The recent detection of gas-phase methanol (CH$_3$OH) lines in the disc of TW Hya by Walsh et al. provided the first observational constraints on the complex O-bearing organic content in protoplanetary discs. The emission has a ring-like morphology, with a peak at $\\sim 30-50$ au and an inferred column density of $\\sim 3-6\\times10^{12}$ cm$^{-2}$. A low CH$_3$OH fractional abundance of $\\sim 0.3-4\\times 10^{-11}$ (with respect to H$_2$) is derived, depending on the assumed vertical location of the CH$_3$OH molecular layer. In this study, we use a thermo-chemical model of the TW Hya disc, coupl"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1703.03748","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":"1703.03748","created_at":"2026-05-18T00:48:53.061848+00:00"},{"alias_kind":"arxiv_version","alias_value":"1703.03748v1","created_at":"2026-05-18T00:48:53.061848+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1703.03748","created_at":"2026-05-18T00:48:53.061848+00:00"},{"alias_kind":"pith_short_12","alias_value":"7VLML77HTPTN","created_at":"2026-05-18T12:31:05.417338+00:00"},{"alias_kind":"pith_short_16","alias_value":"7VLML77HTPTN4VCV","created_at":"2026-05-18T12:31:05.417338+00:00"},{"alias_kind":"pith_short_8","alias_value":"7VLML77H","created_at":"2026-05-18T12:31:05.417338+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/7VLML77HTPTN4VCVIICS6VAHGF","json":"https://pith.science/pith/7VLML77HTPTN4VCVIICS6VAHGF.json","graph_json":"https://pith.science/api/pith-number/7VLML77HTPTN4VCVIICS6VAHGF/graph.json","events_json":"https://pith.science/api/pith-number/7VLML77HTPTN4VCVIICS6VAHGF/events.json","paper":"https://pith.science/paper/7VLML77H"},"agent_actions":{"view_html":"https://pith.science/pith/7VLML77HTPTN4VCVIICS6VAHGF","download_json":"https://pith.science/pith/7VLML77HTPTN4VCVIICS6VAHGF.json","view_paper":"https://pith.science/paper/7VLML77H","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1703.03748&json=true","fetch_graph":"https://pith.science/api/pith-number/7VLML77HTPTN4VCVIICS6VAHGF/graph.json","fetch_events":"https://pith.science/api/pith-number/7VLML77HTPTN4VCVIICS6VAHGF/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/7VLML77HTPTN4VCVIICS6VAHGF/action/timestamp_anchor","attest_storage":"https://pith.science/pith/7VLML77HTPTN4VCVIICS6VAHGF/action/storage_attestation","attest_author":"https://pith.science/pith/7VLML77HTPTN4VCVIICS6VAHGF/action/author_attestation","sign_citation":"https://pith.science/pith/7VLML77HTPTN4VCVIICS6VAHGF/action/citation_signature","submit_replication":"https://pith.science/pith/7VLML77HTPTN4VCVIICS6VAHGF/action/replication_record"}},"created_at":"2026-05-18T00:48:53.061848+00:00","updated_at":"2026-05-18T00:48:53.061848+00:00"}