Document Type
Article
Publication Date
7-15-2015
Abstract
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).,Qthat are surrounded by nearinfrared galaxy overdensities. Overdensities with respect to field counts were found to be significant up to 19£m, with 12 times the expected number of galaxies within the inner regions of the densest proto-cluster. Color¡V magnitude relations are constructed in Ks, J . Ks, with each candidate cluster exhibiting a feature consistent with the beginnings of a red sequence (RS). Galaxy models based on the redshift of the radio source are used to compare expected CMRs for a given formation epoch with the observed RS 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 RS.
Keywords
galaxies: clusters: general, galaxies: clusters: individual (CL J0442+0202, 3C 068.2, MS 1426.9+1052)
Publication Title
Astronomical Journal
Grant
NNX11AF89G
Rights
© The American Astronomical Society. All rights reserved. This content is free to access, download, and share. For all other uses, you must obtain permission to reuse content: https://journals.aas.org/article-charges-and-copyright/#AAS_material
Recommended Citation
Three candidate clusters around high redshift radio-loud sources: MG1 J04426+0202, 3C 068.2, and MS 1426.9+1052. J. R. Franck et al 2015 AJ 150 46
Manuscript Version
Final Publisher Version