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Milky Way Density Profile

  1. Sep 29, 2014 #1
    I'm trying to put together a realistic simulation of the Milky Way. Can anyone direct me to a database or something I can scrape in order to get the density profile?
     
  2. jcsd
  3. Sep 29, 2014 #2

    Vanadium 50

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    That will be difficult, as we don't see the galaxy very well from the inside. It was only about a decade ago where we were pretty sure we live in a barred spiral.
     
  4. Sep 29, 2014 #3

    Astronuc

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    As Vanadium indicated, a detailed model would be difficult based on what we cannot 'see', as well as the enormity of the galaxy ~ 3(+/-1) E11 stars.

    However, there are attempts to understand the stellar distribution.

    The Milky Way Tomography with SDSS. I. Stellar Number Density Distribution
    http://iopscience.iop.org/0004-637X/673/2/864/

    Stellar Populations and the Formation of the Milky Way
    By STEVEN R. MAJEWSKI
    http://www.astro.virginia.edu/class/majewski/astr551/majewski.pdf

    The Milky Way
    http://www.astro.caltech.edu/~george/ay20/Ay20-Lec16x.pdf

    One also needs are reasonable estimate of the rotation curve, or stellar velocity distribution
    http://ned.ipac.caltech.edu/level5/March01/Battaner/node9.html
     
  5. Oct 1, 2014 #4

    Chronos

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    The Milky Way also suffers from the central cusp/core density problem.
     
  6. Oct 1, 2014 #5
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    Astronuc
    Thank you. That was very useful. Particularly the third link labeled "The Milky Way". A logarithmic density profile was what I needed.

    The only problem is that some of the information, particularly about velocities, is a little dated. I found this velocity profile from 1985:

    http://web.njit.edu/~gary/321/Lecture19.html

    Does anyone know where I can find a more updated version. We must have better data about the velocities in our own galaxy in the last 29 years.
     
    Last edited: Oct 1, 2014
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