{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2017:Q4MZ7B4BISORJEAKGZZR2YWCKG","short_pith_number":"pith:Q4MZ7B4B","schema_version":"1.0","canonical_sha256":"87199f8781449d14900a36731d62c25187f66d0dda742363275097aa6b3b3f86","source":{"kind":"arxiv","id":"1710.01027","version":1},"attestation_state":"computed","paper":{"title":"Circumstellar ammonia in oxygen-rich evolved stars","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.GA"],"primary_cat":"astro-ph.SR","authors_text":"F. Wyrowski, J. H. Lacy, K. M. Menten, K. T. Wong, T. Kami\\'nski, T. K. Greathouse","submitted_at":"2017-10-03T08:32:32Z","abstract_excerpt":"The circumstellar ammonia (NH$_3$) chemistry in evolved stars is poorly understood. Previous observations and modelling showed that NH$_3$ abundance in oxygen-rich stars is several orders of magnitude above that predicted by equilibrium chemistry. In this article, we characterise the spatial distribution and excitation of NH$_3$ in the O-rich circumstellar envelopes (CSEs) of four diverse targets: IK Tau, VY CMa, OH 231.8+4.2, and IRC +10420 with multi-wavelength observations. We observed the 1.3-cm inversion line emission with the Very Large Array (VLA) and submillimetre rotational line emiss"},"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":"1710.01027","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2017-10-03T08:32:32Z","cross_cats_sorted":["astro-ph.GA"],"title_canon_sha256":"e192fc4918a63952e6e0e60b9b5dac7ed27ee2988417c87efca7bd7e68d8bf11","abstract_canon_sha256":"b9b5e98b286e5638a141f4c922b01bf7092c1773457d0e8e6cda313745d8e6e3"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:17:42.813077Z","signature_b64":"JOZ2z8uNCnUk+H3TdizA38PMPWgk2Kjrx89wvZFCEckkklR3lX13JjlXhNVMJ5pmURQBtJpqq5BGMl+tE649Bg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"87199f8781449d14900a36731d62c25187f66d0dda742363275097aa6b3b3f86","last_reissued_at":"2026-05-18T00:17:42.812275Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:17:42.812275Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Circumstellar ammonia in oxygen-rich evolved stars","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.GA"],"primary_cat":"astro-ph.SR","authors_text":"F. Wyrowski, J. H. Lacy, K. M. Menten, K. T. Wong, T. Kami\\'nski, T. K. Greathouse","submitted_at":"2017-10-03T08:32:32Z","abstract_excerpt":"The circumstellar ammonia (NH$_3$) chemistry in evolved stars is poorly understood. Previous observations and modelling showed that NH$_3$ abundance in oxygen-rich stars is several orders of magnitude above that predicted by equilibrium chemistry. In this article, we characterise the spatial distribution and excitation of NH$_3$ in the O-rich circumstellar envelopes (CSEs) of four diverse targets: IK Tau, VY CMa, OH 231.8+4.2, and IRC +10420 with multi-wavelength observations. We observed the 1.3-cm inversion line emission with the Very Large Array (VLA) and submillimetre rotational line emiss"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1710.01027","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":"1710.01027","created_at":"2026-05-18T00:17:42.812552+00:00"},{"alias_kind":"arxiv_version","alias_value":"1710.01027v1","created_at":"2026-05-18T00:17:42.812552+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1710.01027","created_at":"2026-05-18T00:17:42.812552+00:00"},{"alias_kind":"pith_short_12","alias_value":"Q4MZ7B4BISOR","created_at":"2026-05-18T12:31:37.085036+00:00"},{"alias_kind":"pith_short_16","alias_value":"Q4MZ7B4BISORJEAK","created_at":"2026-05-18T12:31:37.085036+00:00"},{"alias_kind":"pith_short_8","alias_value":"Q4MZ7B4B","created_at":"2026-05-18T12:31:37.085036+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/Q4MZ7B4BISORJEAKGZZR2YWCKG","json":"https://pith.science/pith/Q4MZ7B4BISORJEAKGZZR2YWCKG.json","graph_json":"https://pith.science/api/pith-number/Q4MZ7B4BISORJEAKGZZR2YWCKG/graph.json","events_json":"https://pith.science/api/pith-number/Q4MZ7B4BISORJEAKGZZR2YWCKG/events.json","paper":"https://pith.science/paper/Q4MZ7B4B"},"agent_actions":{"view_html":"https://pith.science/pith/Q4MZ7B4BISORJEAKGZZR2YWCKG","download_json":"https://pith.science/pith/Q4MZ7B4BISORJEAKGZZR2YWCKG.json","view_paper":"https://pith.science/paper/Q4MZ7B4B","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1710.01027&json=true","fetch_graph":"https://pith.science/api/pith-number/Q4MZ7B4BISORJEAKGZZR2YWCKG/graph.json","fetch_events":"https://pith.science/api/pith-number/Q4MZ7B4BISORJEAKGZZR2YWCKG/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/Q4MZ7B4BISORJEAKGZZR2YWCKG/action/timestamp_anchor","attest_storage":"https://pith.science/pith/Q4MZ7B4BISORJEAKGZZR2YWCKG/action/storage_attestation","attest_author":"https://pith.science/pith/Q4MZ7B4BISORJEAKGZZR2YWCKG/action/author_attestation","sign_citation":"https://pith.science/pith/Q4MZ7B4BISORJEAKGZZR2YWCKG/action/citation_signature","submit_replication":"https://pith.science/pith/Q4MZ7B4BISORJEAKGZZR2YWCKG/action/replication_record"}},"created_at":"2026-05-18T00:17:42.812552+00:00","updated_at":"2026-05-18T00:17:42.812552+00:00"}