{"paper":{"title":"Formation and Fractionation of CO (carbon monoxide) in diffuse clouds observed at optical and radio wavelengths","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"Harvey S. Liszt","submitted_at":"2016-11-11T17:04:44Z","abstract_excerpt":"We modelled \\HH\\ and CO formation incorporating the fractionation and selective photodissociation affecting CO when \\AV\\ $\\la2$mag. UV absorption measurements typically have N(\\cotw)/N(\\coth) $\\approx 65$ that are reproduced with the standard UV radiation and little density dependence at n(H) $\\approx32-1024\\pccc$: Densities n(H) $\\la256\\pccc$ avoid overproducing CO. Sightlines observed in mm-wave absorption and a few in UV show enhanced \\coth\\ by factors of 2-4 and are explained by higher n(H) $\\ga256\\pccc$ and/or weaker radiation. The most difficult observations to understand are UV absorpti"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1611.03783","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"}