{"paper":{"title":"OH absorption in the first quadrant of the Milky Way as seen by THOR","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"A. Brunthaler, A. Walsh, F. Bigiel, F. Wyrowski, H. Beuther, J. D. Soler, J. Kainulainen, J. Ott, J. S. Urquhart, K. M. Menten, L. D. Anderson, M. R. Rugel, N. Roy, N. Schneider, P. F. Goldsmith, R. J. Smith, R. S. Klessen, S. Bihr, S. C. O. Glover, S. E. Ragan, S. N. Longmore, T. Henning, Y. Wang","submitted_at":"2018-03-13T13:37:57Z","abstract_excerpt":"The hydroxyl radical (OH) is present in the diffuse molecular and partially atomic phases of the interstellar medium (ISM), but its abundance relative to hydrogen is not clear. We aim to evaluate the abundance of OH with respect to molecular hydrogen using OH absorption against cm-continuum sources over the first Galactic quadrant. This OH study is part of the HI/OH/Recombination line survey (THOR). THOR is a Karl G. Jansky Very Large Array large program of atomic, molecular and ionized gas in the range 15{\\deg}$\\leq$l$\\leq$67{\\deg} and |b|$\\leq$1{\\deg}. It is the highest-resolution unbiased O"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1803.04794","kind":"arxiv","version":2},"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"}