{"paper":{"title":"A deep Herschel/PACS observation of CO(40-39) in NGC 1068: a search for the molecular torus","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"A. Contursi, A. Poglitsch, A. Sternberg, A. Verma, A.W. Janssen, D. Lutz, E. Gonz\\'alez-Alfonso, E. Sturm, J. Fischer, J. Graci\\'a-Carpio, L. Burtscher, L. Tacconi, R. Davies, R. Genzel, S. Bruderer, S. Hailey-Dunsheath, S. Veilleux","submitted_at":"2015-08-28T10:55:08Z","abstract_excerpt":"Emission from high-J CO lines in galaxies has long been proposed as a tracer of X-ray dominated regions (XDRs) produced by AGN. Of particular interest is the question of whether the obscuring torus, which is required by AGN unification models, can be observed via high-J CO cooling lines. Here we report on the analysis of a deep Herschel-PACS observation of an extremely high J CO transition (40-39) in the Seyfert 2 galaxy NGC 1068. The line was not detected, with a derived 3$\\sigma$ upper limit of $2 \\times 10^{-17}\\,\\text{W}\\,\\text{m}^{-2}$. We apply an XDR model in order to investigate whethe"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1508.07165","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"}