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

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6. Conclusions

We have detected 50 candidate Ly[FORMULA] emitters close to radio galaxy 1138-262 at redshift 2.2. These Ly[FORMULA] 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[FORMULA] 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.

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© European Southern Observatory (ESO) 2000

Online publication: June 26, 2000
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