{"paper":{"title":"Study of the Bipolar Nebula IRAS 19312+1950. II. Circumstellar Chemistry","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"J. Nakashima, S. Deguchi, S. Takano","submitted_at":"2004-10-11T00:17:13Z","abstract_excerpt":"The bipolar nebula, IRAS 19312+1950, is a unique SiO maser source exhibiting both properties as young and evolved objects. To clarify the nature of this object, we made molecular line observations with the Nobeyama 45-m radio telescope. We detected emission from O-bearing (HCO^+, SiO, SO, and SO_2), C- and N-bearing molecules (CN, CS, HCN, HNC, NH_3, N_2H^+, HC_3N, H_2CS, and CH_3OH), and their isotopic species (C^17O, ^13C^18O, and C^34S). Line profiles consist of a weak broad (Dv 30 km/s) and/or a strong narrow (DV< 5 km/s) components, depending on molecular species. Strong time variations o"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0410252","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"}