Timeline for Why is the deep MOND regime not the Newtonian acceleration plus a constant of acceleration?
Current License: CC BY-SA 4.0
17 events
| when toggle format | what | by | license | comment | |
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| S Sep 27 at 19:02 | history | bounty ended | CommunityBot | ||
| S Sep 27 at 19:02 | history | notice removed | CommunityBot | ||
| Sep 22 at 12:45 | comment | added | Andrew | OK, well, I've given you an argument why that can't work. If you can't give or point me to some quantitative argument to support your position, then there's nothing more to say. | |
| Sep 21 at 23:34 | comment | added | Independent Physics | @Andrew I did it myself. It is pretty quick and easy to estimate rotational velocities of an spiral galaxy given its density profile. | |
| Sep 21 at 19:37 | comment | added | Andrew | @IndependentPhysics Can you point me to a peer reviewed paper giving evidence for that claim? | |
| Sep 21 at 19:23 | comment | added | Independent Physics | @Andrew Is its simpler than standard MOND, and applied to a galaxy, it yields more or less the same results. Rotational velocities still scale with an 1/r law over the MOND acceleration. | |
| Sep 21 at 17:13 | answer | added | Perseverant King | timeline score: 1 | |
| Sep 20 at 13:20 | comment | added | Andrew | @IndependentPhysics I guess I'm asking what makes you say that. To me, looking at the two formulas you posted, it looks like a pretty big change -- the first one will scale like $1/r$ at large $r$ and the second will scale like a constant. I'm happy to be proven wrong I'm just asking where are you getting your proposed modification from and what evidence do you have that it makes predictions for rotation curves that are as least as good as ordinary MOND? | |
| Sep 20 at 13:15 | comment | added | Independent Physics | @Andrew I think the sum of Newtonian acceleration and the acceleration scale constant also fits galaxy rotation curves. It is not a "big" modification with respect to deep MOND.. | |
| Sep 20 at 4:24 | comment | added | Edouard | The OP may want to include "Bullet Cluster" in other search terminology, as it seems to have posed problems for MOND. | |
| Sep 20 at 1:34 | history | edited | Qmechanic♦ | CC BY-SA 4.0 |
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| Sep 20 at 1:29 | comment | added | Andrew | Why would you expect it to follow the form you proposed? The point of MOND was to develop a formula that would fit galaxy rotation curves. Since that curve fitting exercise worked, if you modify that formula in a "big" way (not just adding a small correction to the fit), then your modified formula won't fit the data. | |
| S Sep 19 at 16:13 | history | bounty started | Independent Physics | ||
| S Sep 19 at 16:13 | history | notice added | Independent Physics | Draw attention | |
| Sep 17 at 19:42 | comment | added | Independent Physics | No, it is just the standard deep MOND regime explained. | |
| Sep 16 at 22:42 | comment | added | Quillo | Is this of any help? physics.stackexchange.com/a/605772/226902 | |
| Sep 16 at 21:52 | history | asked | Independent Physics | CC BY-SA 4.0 |