2009/02/19 by Neal A. Miller, A. E. Hornschemeier, Ann E. Hornschemeier +1 · 1 citation
Physics and Astronomy · #Astrophysics and Cosmic Phenomena #Astrophysics and Star Formation Studies #Galaxies: Formation, Evolution, Phenomena #astro-ph.CO #astro-ph.GA
paper · pdf · doi:10.1088/0004-6256/137/5/4436
26 pages, accepted for publication in AJ
arxiv created 2009/02/19 · openalex publication_date 2009/04/07 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/01
We present deep 1.4 GHz Very Large Array radio continuum observations of two ∼0.5 deg 2 fields in the Coma cluster of galaxies. The two fields, "Coma 1" and "Coma 3," correspond to the cluster core and southwest infall region and were selected on account of abundant preexisting multiwavelength data. In their most sensitive regions the radio data reach 22 μJy rms per 4 4 beam, sufficient to detect (at 5σ) Coma member galaxies with L 1.4 GHz = 1.3 × 10 20 W Hz −1 . The full catalog of radio detections is presented herein and consists of 1030 sources detected at ⩾5σ, 628 of which are within the combined Coma 1 and Coma 3 area. We also provide optical identifications of the radio sources using data from the Sloan Digital Sky Survey. The depth of the radio observations allows us to detect active galactic nucleus in cluster elliptical galaxies with M r < −20.5 (AB magnitudes), including radio detections for all cluster ellipticals with M r < −21.8. At fainter optical magnitudes (−20.5 < M r ≲ −19), the radio sources are associated with star-forming galaxies with star formation rates as low as 0.1 M ☉ yr −1 .