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Virialized dark matter halos

  1. Feb 2, 2016 #1
    Dear all,

    I am new in the field of galaxy formation, so I am sorry if my questions are a bit simple.
    -what does virialized halo mean? does it mean they obey the virial theorem concerning their kinetic and potential energy?
    \begin{equation} 2<T>=n<V> \end{equation}
    -Why should the halos be like this to merge and make galaxies?
    -do you know any introductory book I could use in this?
     
  2. jcsd
  3. Feb 2, 2016 #2

    Chalnoth

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    Yes, it means they obey the virial theorem. It's expected that a self-gravitating gas cloud should relax into a state where it follows the virial theorem as it reaches equilibrium. However, it's known that the virial theorem frequently is inaccurate for real systems. For example, if a pair of galaxies have recently collided to form one larger galaxy, the resulting galaxy will not be very close to following the virial theorem for some time. It's a very useful approximation to make the math tractable, but not always accurate.
     
  4. Feb 3, 2016 #3
    Is there any introductory book or paper that I can read about this?
     
  5. Feb 3, 2016 #4

    QuantumQuest

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