{"paper":{"title":"Herschel observations of water vapour in Markarian 231","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.CO","authors_text":"A. F. Loenen, A. I. Harris, A. Rykala, A. S. Evans, A. Wei{\\ss}, C. Henkel, C. Kramer, C. Vlahakis, D. A. Naylor, D. B. Sanders, E. Gonz\\'alez-Alfonso, E. M. Xilouris, F. P. Israel, F. Walter, G. J. Stacey, G. Savini, H. A. Smith, J. Fischer, J. Mart\\'in-Pintado, J. Mazzarella, K. Isaak, K. M. Dasyra, L. Armus, L. Spinoglio, M. C. Wiedner, M. Spaans, P. P. Papadopoulos, P. van der Werf, R. Meijerink, S. Aalto, S. Lord, S. Veilleux, T. R. Greve, V. Charmandaris, Y. Gao","submitted_at":"2010-05-20T09:46:18Z","abstract_excerpt":"The Ultra Luminous InfraRed Galaxy Mrk 231 reveals up to seven rotational lines of water (H2O) in emission, including a very high-lying (E_{upper}=640 K) line detected at a 4sigma level, within the Herschel/SPIRE wavelength range, whereas PACS observations show one H2O line at 78 microns in absorption, as found for other H2O lines previously detected by ISO. The absorption/emission dichotomy is caused by the pumping of the rotational levels by far-infrared radiation emitted by dust, and subsequent relaxation through lines at longer wavelengths, which allows us to estimate both the column densi"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1005.3642","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"}