NEAR-INFRARED IMAGING OF FSC 10214+4724 WITH THE KECK,W.M. TELESCOPE

Near-infrared observations of the z=2.286 IRAS source FSC 10214+4724, made with the near-infrared camera on the W. M. Keck Telescope, are re ported. Deep broad-band images at 2.15 and 1.27 mu m, and narrow-band images at 2.165 and 2.125 mu m with 0.''6 to 0.''9 seeing show that FS C 10214+4724 consists of at least three distinct components in a compa ct group of galaxies. The source of the infrared luminosity appears to be in a strongly interacting galaxy that has a luminosity similar to 100 times that of a present-day L galaxy. The interaction suggests an ''age'' of this galaxy of congruent to 10(9) yr. The H alpha emission is resolved as a source of diameter congruent to 5 kpc, Suggesting th at a starburst contributes to the observed H alpha emission. There is an excess of objects in the FSC 10214+4724 field that could represent galaxies in an associated cluster.