NGC 2419 does not challenge modified Newtonian dynamics

R. H. Sanders*

*Corresponding author for this work

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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.

Original languageEnglish
Pages (from-to)L6-L8
Number of pages3
JournalMonthly Notices of the Royal Astronomical Society
Volume419
Issue number1
DOIs
Publication statusPublished - Jan-2012

Keywords

  • gravitation
  • globular clusters: individual
  • dark matter
  • CLUSTERS
  • GRAVITY

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