{"paper":{"title":"Molecular Gas in Mrk 109: Constraining the O2/CO Ratio in Chemically Young Galaxies","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"A. Sievers, D. T. Frayer, E. R. Seaquist, T. X. Thuan","submitted_at":"1998-03-12T20:49:14Z","abstract_excerpt":"We report on observations of CO(1-0) emission from the chemically young starburst galaxy Mrk 109. These observations were part of a study to constrain the O2/CO ratio in metal-deficient galaxies, which were motivated by theoretical work that suggests the possible enhancement of the O2/CO ratio in chemically young systems. Five low metallicity (Z < 0.5 Z(solar)) IRAS galaxies at redshifts z > 0.02 (required to shift the 118.75 GHz O2 line away from the atmospheric line) were searched for CO emission. We detected the CO line in only Mrk 109. From O2 observations of Mrk 109, we achieved an upper "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/9803147","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"}