{"paper":{"title":"An imperfectly passive nature: Bright sub-millimeter emission from dust-obscured star formation in the z=3.717 \"passive\" system, ZF20115","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"A. Bunker, A.M. Swinbank, C.-F. Lim, Chian-Chou Chen, C.-H. Lee, C.M. Harrison, D.J. Rosario, D. Riechers, E. Valiante, H. Dannerbauer, H.-M. Lee, H. Shim, H.S. Hwang, Ian Smail, J.E. Geach, J.M. Simpson (ASIAA), J.S. Dunlop, Junxian Wang, M.J. Michalowski, M. Lee, N. Bourne, R.J. Ivison, S.C. Chapman, Tadayuki Kodama, T. Goto, Wei-hao Wang, W.-L. Tee, X.W. Shu, X.Z. Zheng, Y. Ao, Y. Toba","submitted_at":"2017-04-12T17:59:54Z","abstract_excerpt":"The identification of high-redshift massive galaxies with old stellar populations may pose challenges to some models of galaxy formation. However, to securely classify a galaxy as quiescent, it is necessary to exclude significant ongoing star formation, something that can be challenging to achieve at high redshift. In this letter, we analyse deep ALMA/870um and SCUBA-2/450um imaging of the claimed \"post-starburst\" galaxy ZF-20115 at z=3.717 that exhibits a strong Balmer break and absorption lines. The far-infrared imaging reveals a luminous starburst located 0.4+/-0.1 arcsec (~3kpc in projecti"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1704.03868","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"}