2 ms·
MOND only has a single constant parameter, so I'm not sure if you are referring to something else here? Making dark matter fit observation involves halos and
by MattPalmer1086 2y ago
MOND only has a single constant parameter, so I'm not sure if you are referring to something else here?
Making dark matter fit observation involves halos and cusps and getting the distribution just right so that the Tully Fisher relation (which is about the luminous matter) still holds.
As a layman, I find MOND involves considerably less fitting!
- elashri 2y agoYou will need to have a field theory to go beyond what MOND in original form does. It does only modify Newtonian gravity in the non-relativistic regime, and it applies well at the scale of galaxies but does not address relativistic effects like the one we actually see. One example would be gravitational lensing . To be a successful theory of gravity you would need to be consistent with General relativity. That's the reason why you would go to extend MOND to field theory. The most famous framework would be TeVeS and it does have many fitting parameters.
- MattPalmer1086 2y agoThanks, that is helpful. I knew that MOND wasn't relativistic; that a relativistic version might have many more parameters had not occurred to me.