Abstract
Modified Newtonian Dynamics (MOND), having its sucesses in the phenomenology of rotation curves of disk galaxies, is known to not remove the need for dark matter in galaxy clusters. Does this also apply to central elliptical galaxies? Our sample of globular cluster velocities in NGC 1399, the central galaxy of the Fornax cluster, now comprises 625 objects out to a galactocentric distance of 100 kpc, extending the sample of Richtler et al. (2004). In NGC 1399, the deep MOND regime is realized only at radial distances larger than 100 kpc and one has to apply partly physically unmotivated interpolations between the Newtonian and the MONDian regime. For any of the proposed interpolation schemes, MOND is not able to explain the circular velocity indicated by the globular cluster analysis, so dark matter is still needed. Bekenstein's (2004) interpolation, if applied over the full radial range, might be considered as being consistent with no dark matter. However, preliminary analyses suggest that Bekenstein's interpolations fails to remove the need for dark matter in other central galaxies like NGC 3311 or NGC 6166, so the case of NGC 1399 probably cannot be generalized. Moreover, it predicts too high circular velocities for NGC 4636.