Astron. Astrophys. 358, L1-L4 (2000)

6. Conclusions

We have detected 50 candidate Ly emitters close to radio galaxy 1138-262 at redshift 2.2. These Ly emitters are candidate starburst galaxies in the cluster, which is presumed to exist or to be forming around 1138-262. We do not find a significant overdensity of candidates compared to luminosity functions of blank fields nor do we detect a strong concentration gradient in our 8 Mpc² field. The next step in our search for clusters at high redshift is to confirm the existence of the Ly emitters by multi object spectroscopy at the VLT and determine the spatial correlation function and velocity dispersion, which together with the size of the cluster will give a direct estimate of the total mass. Additionally, we will carry out X-ray observations of 1138-262 with the Chandra telescope.

© European Southern Observatory (ESO) 2000

Online publication: June 26, 2000
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