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Sheets of galaxy clusters

  1. Apr 22, 2003 #1

    drag

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    Greetings !

    I just read Saint's post in the "moving galaxy"
    thread and though I knew the answer to that, I do
    not believe I have so far read somewhere an
    explanation for the existence of the galactic
    cluster sheets.

    So, is there a known and recognized reason ?
    (My guesses :
    1. The same reason that star-systems and galaxies are
    mostly two-dimensional - a simple kinematic
    solution for a system of bodies enitially spread
    around mostly at rest and mutually affected by
    gravitational forces.
    2. Some form of quantization during the BB ? )

    Thanks.

    "I sometimes ask myself how it came about that
    I was the one to develop the theory of relativity.
    The reason, I think, is that a normal adult
    never stops to think about problems of space and time.
    These are things which he has thought about as a child.
    But my intellectual development was retarded, as a
    result of which I began to wonder about space and time
    only when I had already grown up."
    Albert Einstein

    Live long and prosper.
     
  2. jcsd
  3. Apr 22, 2003 #2
    drag-

    How about early galactic collisions and their spatial redistribution of angular momentum?

    Also, sheet clusters may have evolved from clouds of preferred spin.

    Your guesses are good ones, too!
     
  4. Apr 23, 2003 #3

    drag

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    Greetings Loren !
    You mean - shockwaves ?
    Wouldn't expansion prevent that ?
    What do you mean (matter & anti-matter)?
    Thanks, but my first one does not explain why
    the sheets are mostly parallel at all.
    And my second is far from anything I could provide
    an educated opinion about - just a wild thought.

    Live long and prosper.
     
    Last edited: Apr 23, 2003
  5. Apr 23, 2003 #4
    drag-

    Collisions between galaxies of various orientations in the early universe may have enabled parallel distribution. Preferring low angular velocity, the developing galaxies expanded in one plane while conserving angular momentum and increasing entropy.

    Before galaxies there were stars, and before them, hydrogen molecules. In a given primordial region much larger than a galaxy but much smaller than the universe there would have been probably an overall angular momentum which condensed eventually into local galactic sheets.
     
  6. Apr 24, 2003 #5

    drag

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    Greetings !

    Intresting.
    Is this some type of Chaotic behaviour (there are
    huge amounts of stars and matter in every "sheet") ?
    Are there some mathematical models that adress
    such a solution ? What's the difference if we
    consider every star to be a galaxy and then
    use the same model ? Do the "sheets" have angular
    momentum (which could "help" such a model) ?

    (Links would also be appreciated people, I'm going
    to look for some myself too.)

    Thanks !

    Live long and prosper.
     
    Last edited: Apr 24, 2003
  7. Apr 24, 2003 #6

    drag

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