RADIAL-VELOCITIES OF GLOBULAR-CLUSTERS IN THE GIANT ELLIPTIC GALAXY NGC-1399

We report radial velocity measurements for 18 globular clusters and on e dE galaxy in the field of the giant elliptical galaxy NGC 1399, the dominant galaxy of the Fornax Cluster. We also present radial velocity measurements for some possible young and super-metal-rich globular cl usters, which turn out to be foreground or background objects (viz., 2 8 stars and seven galaxies). The genuine globular clusters are selecte d, on the basis of their magnitudes and colors, to be metal-rich. For this cluster sample, we measure a mean radial velocity of v(rad) = 135 3 +/- 79 km s(-1) and a velocity dispersion of sigma = 338 +/- 56 km s (-1). Using a few different mass estimators, this implies MIL values i n the range 50-130 within a radius of 28 kpc, consistent with M/L incr easing with radius. Our velocity dispersion estimate (sigma) is interm ediate between the value computed from the integrated stellar light at smaller radii and that computed at large radii from recent X-ray obse rvations.