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A Group of Red, Ly-alpha Emitting, High Redshift Galaxies

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Date

1997-03-27

Authors

Francis, Paul
Woodgate, Bruce E.
Danks, Anthony C.

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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.

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Citation

URI

http://hdl.handle.net/1885/147238

Collections

ANU Research Publications

Source

The Astrophysical Journal

Type

Journal article

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Access Statement

Open Access

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DOI

10.1086/310667

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