{"paper":{"title":"Variations in H2O+/H2O ratios toward massive star-forming regions","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"A. Baudry, A. De Jonge, A. Fuente, A.M. di Giorgio, A.O. Benz, B. Larsson, B. Nisini, B. Parise, C. Codella, C. Dominik, C. McCoey, C. Risacher, D. Beintema, D. Johnstone, D. Lis, E. Bergin, E. Falgarone, E.F van Dishoeck, F. Daniel, F. Helmich, F. Herpin, F. van der Tak, F. Wyrowski, G. Blake, G.J. Herczeg, G. Melnick, J. Braine, J. Cernicharo, J.C. Pearson, J.H. Black, J.K. J{\\o}rgensen, J.R. Goicoechea, J. Santiago, J. Stutzki, L. Chavarria, L.E. Kristensen, M. Benedettini, M. Fich, M. Gerin, M. Marseille, M. Olberg, M.R. Hogerheijde, M. Tafalla, N. Whyborn, P. Bjerkeli, P. Caselli, P. Dieleman, P. Encrenaz, P. Roelfsema, P. Saraceno, R. Bachiller, R. Liseau, R. Plume, R. Shipman, R. Visser, S. Bontemps, S. Bruderer, S.D. Doty, S. Wampfler, T.A. van Kempen, T. Giannini, Th. de Graauw, T. Jacq, U.A. Y{\\i}ld{\\i}z, V. Ossenkopf, W. Frieswijk","submitted_at":"2010-07-26T03:03:12Z","abstract_excerpt":"Early results from the Herschel Space Observatory revealed the water cation H2O+ to be an abundant ingredient of the interstellar medium. Here we present new observations of the H2O and H2O+ lines at 1113.3 and 1115.2 GHz using the Herschel Space Observatory toward a sample of high-mass star-forming regions to observationally study the relation between H2O and H2O+ . Nine out of ten sources show absorption from H2O+ in a range of environments: the molecular clumps surrounding the forming and newly formed massive stars, bright high-velocity outflows associated with the massive protostars, and u"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1007.4370","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"}