# MOND : Help with fitting procedure!

by devd
Tags: fitting, mond, rotation curves
 P: 15 I am looking for pedagogical guides to fitting rotation curves with MOdified Newtonian Gravity. I want to study how to fit the luminosity data as well as the kinematic data. I have studied some published papers on MOND fits(Sanders, Mcgaugh, blok etc). But, they are not sufficiently elaborate. Can somebody provide any links, resources that i might find useful? Thank you!
 P: 1,857 MOND isn't particularly supported here, simply due to our focus on main stay cosmology. In accordance to $\Lambda$CDM. You could try www.arxiv.com. I haven't looked at MOND in several years now. Not saying we only discuss LCDM, loop quantum cosmology is another popular model discussed often. MOND simply isn't too popular in forum discussions. The relativistic version of MOND theory (TeVeS), also isn't particulalry discussed. For that matter I can't recall the last discussion on (TeVeS).
 P: 15 But, that's the scenario everywhere! that's why i've been unable to find any pedagogical material on MOND fits to rotation curves. I've surveyed the papers at arxiv.com, but they are too terse to understand sufficiently. :(
 P: 1,857 MOND : Help with fitting procedure! the only pedagogical material I usually see on it is usually comparisons between the two. Don't know what to tell you. The only help I can offer is to browse through the supportive references of the various MOND articles. MOND simply isn't in standard textbooks. So information on it is very limited. Its far easier to find materials to LQC and LCDM than MOND TeVeS etc. here is one pedagogical view between the two, you might find supportive references from it. That's all I can recommend. MOND simply isn't popular and is falling out of favor, it was easier to find papers on it 5 to 10 years ago than it is now. Though I don't believe TeVeS ever gained much popularity. Its on the order of say Poplowskii's spin and torsion model, where he tried to do away with dark energy lol. I don't even think he's working on that model anymore http://arxiv.org/pdf/1301.0623v2.pdf I'll dig through my archives, I might still have one or two articles tucked away somewhere, it will take some time though I have over 100 gigs of PDF files
 P: 1,857 aha your in luck I did have one and found the article on arxiv for you. The MOND Paradigm by Mordehai Milgrom http://arxiv.org/abs/0801.3133
P: 1,857
 Quote by devd But, that's the scenario everywhere! that's why i've been unable to find any pedagogical material on MOND fits to rotation curves. I've surveyed the papers at arxiv.com, but they are too terse to understand sufficiently. :(
key note here, you cannot understand MOND unless you also understand the metrics used in
standard Cosmology. MOND, isn't its own set of metrics, it uses differential geometry, SR and GR just as the FRW and Einstein field equations do. It simply modifies them where needed. That's probably why you find MOND articles terse and have difficulty understanding them.

put another way you need to first understand LCDM, and all that goes with it
 P: 15 Thanks for all the help! Much appreciated! :)
 P: 1,857 no problem this is the last article I had in my data base on MOND, still a link on web for it though. Good luck http://journals.cambridge.org/downlo...74d9e8bd98cb77 oops I lied had one more. Modified Newtonian Dynamics, an Introductory Review http://arxiv.org/abs/astro-ph/0601478
 Sci Advisor PF Gold P: 9,454 MOND is an effective theory - meaning it fits observational evidence to a limited extent. It has no substantive underlying theoretical support.
 P: 1,857 That I agree with, I always found it amusing though that some MOND metrics uses Dipolar dark matter. see the first article

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