{"paper":{"title":"\"Red\" but Not \"Dead\": Actively Star-forming Brightest Cluster Galaxies at Low Redshifts","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"Haojing Yan, James Runge","submitted_at":"2017-12-05T05:23:41Z","abstract_excerpt":"Brightest Cluster Galaxies (BCGs) are believed to have assembled most of their stars early in time and, therefore, should be passively evolving at low redshifts and appear \"red-and-dead.\" However, there have been reports that a minority of low-redshift BCGs still have ongoing star formation rates (SFR) of a few to even $\\sim$100 $M_\\odot/yr$. Such BCGs are found in \"cool-core\" (\"CC\") clusters, and their star formation is thought to be fueled by \"cooling flow.\" To further investigate the implications of low-redshift, star-forming BCGs, we perform a systematic search using the 22$\\mu$m data (\"W4"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1712.01482","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"}