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Merging event of galaxies

  1. May 16, 2010 #1
    Hi everyone, this is an interesting question i can't tackle as i don't really know where to start...

    Spiral discs are found to be composed of both a thin and a thick disc population. One way that a thick disc can be created is through the merger of minor satellites. Consider the energy of a merger event and estimate the increase in the scale height of a disc through such an event. If the Milky Way's thick disc is approximately 3 times that of the thin disc, estimate the maximum mass of a satellite that has merged with the Milky Way. You should assume that the mass of the Milky Way disc is 10 Msun , a vertical velocity dispersion of
    30 km sā€“1 and an encounter velocity of 200 km sā€“1.

    Maye equation orbital energy with internal energy ??

    THANK YOU VERY MUCH for any help :)
  2. jcsd
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