A Group of Red, Ly-alpha Emitting, High Redshift Galaxies
Abstract
We have discovered two new high redshift (z=2.38) galaxies, near the previously known z=2.38 galaxy 2139-4434 B1 (Francis et al. 1996). All three galaxies are strong Ly-alpha emitters, and have much redder continuum colors (I-K about 5) than other optically-selected high redshift galaxies. We hypothesize that these three galaxies are QSO IIs; radio-quiet counterparts of high redshift radio galaxies, containing concealed QSO nuclei. The red colors are most easily modelled by an old (> 0.5 Gyr), massive (> 10E11 solar masses) stellar population. If true, this implies that at least one galaxy cluster of mass much greater than 3E11 solar masses had collapsed before redshift five.
Cite
@article{arxiv.astro-ph/9703178,
title = {A Group of Red, Ly-alpha Emitting, High Redshift Galaxies},
author = {Paul J. Francis and Bruce E. Woodgate and Anthony C. Danks},
journal= {arXiv preprint arXiv:astro-ph/9703178},
year = {2009}
}
Comments
12 pages, 2 figures, uses aaspp4 style file. Accepted for publication in Astrophysical Journal Letters