• DOI:10.1088/0004-6256/150/2/46
• Corpus ID: 51801072

Three candidate clusters around high redshift radio-loud sources: MG1 J04426+0202, 3C 068.2, MS 1426.9+1052

@article{Franck2015ThreeCC,
  title={Three candidate clusters around high redshift radio-loud sources: MG1 J04426+0202, 3C 068.2, MS 1426.9+1052},
  author={J. R. Franck and Stacy S. McGaugh and James M. Schombert Case Western Reserve University and University of Oregon},
  journal={arXiv: Astrophysics of Galaxies},
  year={2015}
}

• J. Franck, S. McGaugh, +1 author U. Oregon
• Published 28 May 2015
• Physics
• arXiv: Astrophysics of Galaxies

We present near-infrared observations of the environments around three radio-loud sources (MG1 J0442+0202, 3C 068.2, and MS 1426.9+1052) at redshifts z=1.10,1.57, and 1.83 (respectively), that are surrounded by near-infrared galaxy overdensities. Overdensities with respect to field counts were found to be significant up to 19-sigma, with twelve times the expected number of galaxies within the inner regions of the densest proto-cluster. Color-magnitude relations are constructed in K_s, J-K_s, with each candidate cluster exhibiting a feature consistent with the beginnings of a red sequence. Galaxy models based on the redshift of the radio source are used to compare expected color-magnitude relations for a given formation epoch with the observed red sequence of each candidate, and are found to be consistent with an old (z_f > 5) formation epoch for a few bright, red galaxies on the red sequence.