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Information on large scale structure?

  1. Apr 24, 2014 #1
    Can anyone recommend some usufull links,pdf,... for information on large scale structure?

    I want to fully understand how in the cold dark matter model the the hierarchical formation of matter occurs and the role of the initial perturbations in the evolution of the universe.

    Thank you.
  2. jcsd
  3. Apr 24, 2014 #2
    How good is your math, particle physics and thermodynamics? I could post numerous highly technical articles on the subject. However if you don't have a good understanding already then they will be difficult to understand. Dark matter is one contributor to large scale structure formation but thermodynamic anisotropies also play a factor.

    Much of this is covered in this article, however its highly technical

    "Physics of the Intergalactic medium"


    good stepping stone articles covering the metrics involved in the previous article would be these two below

    The thermodynamics coverage is pretty good in this article, he also covers the Einstein field equations and FLRW metrics.
    http://www.wiese.itp.unibe.ch/lectures/universe.pdf :" Particle Physics of the Early universe" by Uwe-Jens Wiese
    This will also be handy its almost a cosmology style textbook so it also covers large scale structure formation
    http://arxiv.org/pdf/hep-ph/0004188v1.pdf :"ASTROPHYSICS AND COSMOLOGY"- A compilation of cosmology by Juan Garcıa-Bellido

    Also inflation also plays a role, some of the details are covered in this thread
    Last edited: Apr 24, 2014
  4. Apr 24, 2014 #3
    A quick and loose breakdown, keep in mind I may forget some of the contributors lol

    1) Early universe is in thermal equilibrium= even distribution, also extremely high temperatures over a small volume. Too hot for stable particle interactions.
    2)inflation occurs and distributes this high energy plasma evenly
    3) inflation slows to a stop but has a reheating phase, at the end of inflation. However some regions stop inflating before other regions, this assists anisotropies in the thermal equilibrium plasma. May or may not also contribute to baryogenesis
    4) Due to those anisotropies particles in cooler regions will drop out of thermal equilibrium before others. The various particle species drop out of equilibrium at different temperatures
    5) As such the cooler regions will allow matter to form prior to the hotter regions, that matter will start to clump due to gravity. Large scale structure formation starts.

    edit: forgot to add this is why the CMB is of great use, the temperature variations left an imprint that we further study LSS formation.
    Last edited: Apr 24, 2014
  5. Apr 25, 2014 #4
    Thank you very much!! I am currently on the subject of correlation function of dark matter haloes, which were generated in light-cone simulations. Anything in this topic that you have in mind??
  6. Apr 25, 2014 #5
    Well there is a lot about dark matter we still don't fully understand. One of the key questions is "does dark matter interact with other weakly interactive particles" such as neutrinos. What we don know of dark matter is that it is cold (non relativistic), a slow moving particle, with a low density. The low density and lack of measured interactions indicate its weakly interactive.

    This paper covers one such prospect.


    there is however numerous information on the web correlating structure formation via dark matter. Keep in mind, we still do not completely understand dark matter in regards to thermodynamic processes. So there is, How shall we say alternate conjectures.

    http://arxiv.org/pdf/0909.2021.pdf, Dark Matter and Galaxy Formation
    http://arxiv.org/abs/astro-ph/9707285 Dark Matter and Structure Formation in the Universe (older article but still has good information)
    http://arxiv.org/abs/astro-ph/9801234 Structure Formation with Generalized Dark Matter (older as well
    http://arxiv.org/abs/astro-ph/9711259 The Structure and Dynamics of Cold Dark Matter Halos
    http://arxiv.org/abs/astro-ph/9710329 Inside-out Galaxy Formation
    http://arxiv.org/abs/astro-ph/9910246 Galaxy Formation and Large Scale Structure

    those should get you started you will notice I stuck to www.arxiv.org. You can browse there for more papers, which will give you non multi-media articles on the subject

    edit:eek:ne key point is that if DM and neutrino interactions are shown via observations, then the thermodynamics of LSS will probably need updating, may or may not be an earlier contributor
    Last edited: Apr 25, 2014
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