{"paper":{"title":"An Imaging Spectroscopic Survey of the Planetary Nebula NGC 7009 with MUSE","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"(10) Leiden Observatory, (11) Kyoto University Honjo), (2) IAC, 3), (3) Universidad de La Laguna, (4) UCL, (5) University of Denver, (6) Jodrell Bank Centre for Astrophysics, 7), (7) University of Hong Kong (8) Universidad Catolica del Norte, 9), (9) Leopold Franzens University Innsbruck, A. A. Zijlstra (6, A. Monreal-Ibero (2, J. R. Walsh (1), M. J. Barlow (4), M. L. Leal-Ferreira (10), M. Otsuka (11) ((1) ESO, R. Wesson (4), S. Kimeswenger (8, T. Ueta (5)","submitted_at":"2018-10-09T13:49:08Z","abstract_excerpt":"The spatial structure of the emission lines and continuum over the 50 arcsecond extent of the nearby, O-rich, planetary nebula NGC 7009 (Saturn Nebula) have been observed with the MUSE integral field spectrograph on the ESO Very Large Telescope. Science Verification data, in <0.6 arcsecond seeing, have been reduced and analysed as images over the wavelength range 4750-9350A. Emission line maps over the bright shells are presented, from neutral to the highest ionization available (He II and [Mn V]). For collisionally excited lines (CELs), maps of electron temperature (T_e from [N II] and [S III"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1810.03984","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"}