{"paper":{"title":"A giant Ly$\\alpha$ nebula in the core of an X-ray cluster at $z=1.99$: implications for early energy injection","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.CO"],"primary_cat":"astro-ph.GA","authors_text":"A. Cimatti, A. Finoguenov, A. M. C. Le Brun, A. Renzini, A. Zanella, C. Vignali, D. Elbaz, E. Daddi, F. Bournaud, F. Valentino, J-L. Starck, M. B\\'ethermin, M. Carollo, M. Dickinson, M. Onodera, M. Pannella, M. T. Sargent, N. Arimoto, R. Gobat, V. Strazzullo","submitted_at":"2016-05-10T20:00:58Z","abstract_excerpt":"We present the discovery of a giant $\\gtrsim$100~kpc Ly$\\alpha$ nebula detected in the core of the X-ray emitting cluster CL~J1449+0856 at $z=1.99$ through Keck/LRIS narrow-band imaging. This detection extends the known relation between Ly$\\alpha$ nebulae and overdense regions of the Universe to the dense core of a $5-7\\times10^{13}$ M$_{\\odot}$ cluster. The most plausible candidates to power the nebula are two Chandra-detected AGN host cluster members, while cooling from the X-ray phase and cosmological cold flows are disfavored primarily because of the high Ly$\\alpha$ to X-ray luminosity rat"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1605.03194","kind":"arxiv","version":2},"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"}