A search for clusters at high redshift - II. A proto cluster around a radio galaxy at z=2.16

L. Pentericci, J. D. Kurk, H. J. A Rottgering +7

VLT spectroscopic observations of Ly alpha--excess objects in the field of the clumpy radio galaxy 1138-262 at z=2.16 have led to the discovery of 14 galaxies and one QSO at approx…