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Keywords:

  • gravitation;
  • globular clusters: individual;
  • dark matter

ABSTRACT

I show that, in the context of modified Newtonian dynamics (MOND), non-isothermal models, approximated by high-order polytropic spheres, are consistent with the observations of the radial distribution of the line-of-sight velocity dispersion in the distant globular cluster, NGC 2419. This calls into question the claim by Ibata et al. that the object constitutes a severe challenge for MOND. In general, the existence and properties of globular clusters are more problematic for LCDM than for MOND.