A review on success and problem of MOND on globular cluster scale
| dc.creator | Zhao, HongSheng | |
| dc.date | 2005-08-30 | |
| dc.date.accessioned | 2026-07-25T12:30:45Z | |
| dc.description | Many past attempts to kill MOND have only strengthened the theory. Better data on galaxy velocity curves clearly favor MOND (without fine-tuning) over cold dark matter. The usual critism on the incompleteness of classical MOND has spurred a Modified Relativity (MR) by Bekenstein. After outlining cosmology and lensing in MOND, we review MOND on small scales. We point out some potential problems of MOND in two-body relaxation and tidal truncation. We argue that the tidal field in any MOND-like gravity theory predicts that the Roche lobe sizes of a binary system are simply proportional to the binary baryonic mass ratio to the power 1/3. An immediate application of this result is that the tidal field and tidal truncation radii of million-star globular clusters and million-star dwarf galaxies (e.g., the Milky Way satellites NGC2419 and Carina) would be very similar because of the one-to-one relation between gravity and baryon distribution. This prediction appears, however, inconsistent with the fact that {\it all} globulars are truncated to much smaller sizes than {\it all} dwarf galaxies. Whether tide is uniquely determined by baryons can also be used to falsify any MOND-like gravity theory, whether classical or relativistic. | |
| dc.description | to appear in IAU Col. 198, Helmut Jerjen and Bruno Binggeli eds | |
| dc.identifier | https://arxiv.org/abs/astro-ph/0508635 | |
| dc.identifier | http://arxiv.org/abs/astro-ph/0508635 | |
| dc.identifier.uri | https://dspace.dare.co.zw/handle/123456789/10386 | |
| dc.subject | Astrophysics | |
| dc.title | A review on success and problem of MOND on globular cluster scale | |
| dc.type | text |