HALO STARS, STARBURSTS, AND DISTANT GLOBULAR-CLUSTERS - A SURVEY OF UNRESOLVED OBJECTS IN THE HUBBLE DEEP FIELD

We present a survey of unresolved objects in the Hubble Deep Field. We End 59 such objects with I(814)less than or equal to 28. Only nine ar e candidates for low mass (m less than or equal to 0.5M.) halo stars. This rules out a steeply rising luminosity function fainter than M(V)= 12, and precludes low mass stars as a major constituent of halo dark m atter. Although 50 of the unresolved objects have colors consistent wi th those of white dwarfs, we argue that they are unlikely to be. They are more probably regions of intense star formation with size less tha n about a kiloparsec. We find no candidate quasars, but the small size of the held does not allow us to put many constraints on quasar numbe r densities. Finally, we identify 11 globular clusters candidates asso ciated with an elliptical galaxy with a distance modulus of similar to 39.