[Quote:RussT]
SO those spheres (If they really exist) MUST form somehow...How?[/QUOTE]
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Originally Posted by StupendousMan
Gravitational interactions between clumps of dark matter can cause some clumps to lose angular momentum and energy.
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Sorry, I wasn't clear enough. Since DM is collisionless with itself or baryonic matter how can it ever clump anywhere?
And since they have not even identified what the DM is, and since it is going right through stars (AT every concievable angle in a straight line) planets and our bodies in prolific amounts, what can make it lose energy, and how do we even know how its energy manefests itself. If anything, they appear to be absolutely 'inert'.
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Originally Posted by StupendousMan
No, the influence of a SMBH at the center of a galaxy on the non-baryonic dark matter in that galaxy's halo will be minimal. The regular matter distributed throughout the galaxy will have a larger effect. The non-baryonic dark matter itself will have the largest effect. Halos need not be rotating, by the way; they may be triaxial.
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The non-baryonic DM totally permeates the galaxy from my understanding.
Do you think that the halo outside the galaxy has more DM than the galaxy does from the outer rim inwards? Also, all that DM is going right through all the stars and planets in the galaxy, so are you saying that the DM that is around each galaxy is gravitationally bound to that galaxy, or is it moving right through the whole galaxy being replaced by more DM coming into that galaxy?