NGC 2419 does not challenge MOND

TL;DR

This paper demonstrates that non-isothermal polytropic models within MOND can explain NGC 2419's velocity dispersion data, challenging previous claims that it contradicts MOND, and suggests globular clusters are more compatible with MOND than LCDM.

Contribution

It shows that high-order polytropic models in MOND fit NGC 2419 data, countering claims that the cluster challenges MOND's validity.

Findings

Non-isothermal polytropic models fit NGC 2419 data

NGC 2419 does not challenge MOND

Globular clusters are more problematic for LCDM

Abstract

I show that, in the context of 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.