{"paper":{"title":"Water vapour at high redshift: Arecibo monitoring of the megamaser in MG J0414+0534","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.CO","authors_text":"(2) National Radio Astronomy Observatory, (3) Astron, (4) Max-Planck-Institut f\\\"ur Radioastronomie, (5) Argelander-Institut f\\\"ur Astronomie, (6) National Radio Astronomy Observatory, A. Brunthaler (4), A. L. Roy (4), Bonn, Capoterra, Charllottesville, C. Henkel (4), C. M. V. Impellizzeri (2), Dwingeloo, E. Momjian (6) ((1) INAF-Osservatorio Astronomico di Cagliari, Germany, Italy, J. Ott (6), J. P. McKean (3), O. Wucknitz (5), P. Castangia (1), Socorro, The Netherlands, USA, USA)","submitted_at":"2011-03-22T16:31:57Z","abstract_excerpt":"The study of water masers at cosmological distances would allow us to investigate the parsec-scale environment around powerful radio sources, to probe the physical conditions of the molecular gas in the inner parsecs of quasars, and to estimate their nuclear engine masses in the early universe. To derive this information, the nature of the maser source, jet or disk-maser, needs to be assessed through a detailed investigation of the observational characteristics of the line emission. We monitored the maser line in the lensed quasar MGJ0414+0534 at z = 2.64 with the 300-m Arecibo telescope for ~"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1103.4301","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"}