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A Group of Red, Ly-alpha Emitting, High Redshift Galaxies | | Paul J. Francis
; Bruce E. Woodgate
; Anthony C. Danks
; | | Date: |
27 Mar 1997 | | Subject: | astro-ph | | Affiliation: | Melbourne), Bruce E. Woodgate (GSFC) and Anthony C. Danks (Hughes STX | | 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. | | Source: | arXiv, astro-ph/9703178 | | Services: | Forum | Review | PDF | Favorites | |
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