{"paper":{"title":"The formation history of massive cluster galaxies as revealed by CARLA","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.CO"],"primary_cat":"astro-ph.GA","authors_text":"A. Galametz, A. Rettura, C. J. Conselice, D. Stern, D. Wylezalek, E. A. Cooke, M. Brodwin, M. Jarvis, N. A. Hatch, N. Seymour, O. Almaini, P. R. Eisenhardt, S. A. Stanford, S. I. Muldrew, W. G. Hartley","submitted_at":"2015-07-01T20:01:08Z","abstract_excerpt":"We use a sample of 37 of the densest clusters and protoclusters across $1.3 \\le z \\le 3.2$ from the Clusters Around Radio-Loud AGN (CARLA) survey to study the formation of massive cluster galaxies. We use optical $i'$-band and infrared 3.6$\\mu$m and 4.5$\\mu$m images to statistically select sources within these protoclusters and measure their median observed colours; $\\langle i'-[3.6] \\rangle$. We find the abundance of massive galaxies within the protoclusters increases with decreasing redshift, suggesting these objects may form an evolutionary sequence, with the lower redshift clusters in the "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1507.00350","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"}