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Question: Mass distribution in galaxies

  1. Aug 27, 2007 #1
    What is a typical distribution of mass in a typical spiral galaxy. I understand most is in the centre, but how much? How much in the outer regions? Can anyone point me to graphs or tables?

    Much appreciated.
     
  2. jcsd
  3. Aug 27, 2007 #2
    That's a good question. I'm sure there would have been such plots in the earliest papers to mention "dark matter" (or even just "rotation curves", although that is a different graph), and since the data must have improved since then, maybe someone knows a good review article?
     
  4. Aug 27, 2007 #3

    Astronuc

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    Staff: Mentor

    Here are some possibilities to get started.

    ACCURATE PARAMETERS OF THE MASS DISTRIBUTION IN SPIRAL GALAXIES. I. FABRY-PEROT OBSERVATIONS OF NGC 5585
    http://www.journals.uchicago.edu/AJ/journal/issues/v118n5/980526/980526.html
    SÉBASTIEN BLAIS-OUELLETTE



    Structure and mass distribution of spiral galaxies at intermediate redshifts
    http://arxiv.org/PS_cache/astro-ph/pdf/0212/0212521v1.pdf


    Mass distribution of spiral galaxies from characteristics of spiral structure:
    Constraints on galaxy formation models
    http://arxiv.org/PS_cache/astro-ph/pdf/0508/0508338v1.pdf


    Light and mass distribution of the Magellanic-type spiral NGC 3109
    http://adsabs.harvard.edu/abs/1985ApJ...299...59C


    Nature 325, 779 - 782 (26 February 2002); doi:10.1038/325779a0 (have to purchase)
    Mass distribution in spiral galaxies
    L. K. Erickson, S. T. Gottesman & J. H. Hunter Jr
    http://www.nature.com/nature/journal/v325/n6107/abs/325779a0.html
     
  5. Aug 28, 2007 #4

    hellfire

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    Science Advisor

    Here you can find a useful thread in PF:
    https://www.physicsforums.com/showthread.php?p=881160
    Take a special look to post #6, there you will find a discussion about the isothermal sphere profile and others that are used for simulations.

    A short summary about current density profiles of galaxies used in simulations (NFW and CDM profiles) is given here:
    http://www.astro.uni-bonn.de/~uklein/research/dm.html
    You will find there also some usual formulas for the density profile. Note however that the determination of universal density profiles is a topic of current research, as you can read in that page.
     
    Last edited: Aug 28, 2007
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