A COMPACT RADIO COMPONENT IN 4C-41.17 AT Z=3.8 - A MASSIVE CLUMP IN AFORMING GALAXY

We present the results of a study of the centiarcsecond radio structur e at wavelength of 18 cm in the high-redshift galaxy associated with t he radio source 4C 41.17 (z = 3.8). We have detected a component of si ze not more than 15 mas (similar or equal to 65 pc, H-o = 75 km s(-1) Mpc(-1), q(o) = 0.5) at a distance of similar or equal to 2.9 kpc from the nucleus of the galaxy which accounts for similar to 30% of the fl ux density of the previously known unresolved VLA component. We specul ate that the radio component is associated with a clump in the interst ellar medium. The estimate of its mass, 1.5 x 10(8) M., is consistent with those of subgalactic structures preceding formation of globular c lusters in the early stages of the evolution of galaxies.