A Tale of Two Paradigms: the Mutual Incommensurability of LCDM and MOND · HackerPapers discussions

A Tale of Two Paradigms: the Mutual Incommensurability of LCDM and MOND — mentioned by XorNot

Thu, 20 Jun 2024 16:07:55 GMT

For one thing MOND doesn't actually appear to eliminate the need for dark matter[1]. It gets rid of ~80% of the missing mass requirement, but not all of it. Whereas pure DM can just eliminate MOND. Then you've got the "Bullet Cluster"[2] - where two colliding galaxies have had their observable and dark matter masses apparently separated. MOND can't explain this one without a lot of tweaking, but it's pretty trivial for DM: electromagnetically interacting matter is "sticky" where as gravity only matter isn't. The Bullet Cluster shows a galaxy shaped blob of gravitational lensing exactly where…

Paper and discussion history. A mention is not an endorsement.

A Tale of Two Paradigms: the Mutual Incommensurability of LCDM and MOND — mentioned by naasking

Mon, 18 Mar 2024 16:54:42 GMT

> I don't know what you mean by this. Sure, after more curve fitting [1]. It's just more inconvenient history that's been forgotten to favour LCDM. > You will find no paper out there that can reach the same level of predictions as DM. That's just wrong. LCDM's curve fitting has become great due to all of the adjustments, it's a priori predictions have not been great: https://arxiv.org/abs/2110.06936 > some form of DM will still be required This was always the case as I already pointed out in my previous reply, going back to at least the 90s [2]. The point is that cold dark matter has…

Paper and discussion history. A mention is not an endorsement.