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There are many, many studies of the Dark Matter halo around the Milky Way but I'm having trouble finding good raw data about visible matter. I'm investigating a MOND like model and would like some data uncorrupted with CDM assumptions.

Data and/or estimates would be fine just so long as they are uncorrupted with assumptions about cold, dark matter. Many of the papers out there spend a huge amount of their energy trying to estimate the effects of a modelled halo on the actual kinematic data. I'm looking for something that is based on observed (baryonic) matter.

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  • $\begingroup$ Just to be clear, you want data and not estimates for the baryonic mass, right? And when you say "uncorrupted with CDM assumptions", what specifically do you mean? $\endgroup$ – Jim Aug 27 '15 at 14:00
  • $\begingroup$ Data and/or estimates would be fine just so long as they are uncorrupted with assumptions about cold, dark matter. Many of the papers out there spend a huge amount of their energy trying to estimate the effects of a modelled halo on the actual kinematic data. I'm looking for something that is based on observed (baryonic) matter. $\endgroup$ – Quarkly Aug 27 '15 at 15:30
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    $\begingroup$ Don, have a look at arxiv.org/abs/1205.5037 and backtrack through the references. See for example Sommer-Larsen 2006. But have a look at this too before spending too much time on a MOND-like model. Space is cold, space is dark, and it has its vacuum energy, which has a mass-equivalence. $\endgroup$ – John Duffield Aug 27 '15 at 16:03
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    $\begingroup$ @JohnDuffield - The difference between religion and science is that no amount of data will change the mind of a religious person, where as just a single piece of data can change the mind of a scientist. Which are you? Why do you give me dogma when I'm asking for data? $\endgroup$ – Quarkly Aug 27 '15 at 16:45
  • $\begingroup$ Interesting papers are adsabs.harvard.edu/abs/2008ApJ...673..864J and adsabs.harvard.edu/abs/2010ApJ...716....1B, and related papers. $\endgroup$ – HDE 226868 Aug 27 '15 at 20:19
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It sounds like you are trying to reproduce the work of McGaugh (2008, http://arxiv.org/abs/0804.1314 ).

In section 3, they adapt a model (the Tuorla-Heidelberg model), based on observations, for the baryonic mass distribution in the Galaxy. The model is based on a synthesis of a number of observational studies.

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  • $\begingroup$ Thank you. I did find that paper but I'm not able to find the work upon which it's based: the Tuorla-Heidelber model. If you find a link, please post it. $\endgroup$ – Quarkly Aug 27 '15 at 21:46
  • $\begingroup$ This looks like the data I need, but I'm having trouble deciphering it. Perhaps you can help. The charts on Stacy's web page - astroweb.case.edu/ssm/models - contains detailed density data at a given radius. However, I can't go from density to enclosed mass (which I need to calculate velocity at a given distance). It seems to me that I'd need a volume in order to convert. Any ideas? $\endgroup$ – Quarkly Aug 28 '15 at 12:56

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