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Originally Posted by dgavin
The dark galaxy is a definate find. If this is an example of how new dwarf galaxies typically from then we could probably account for much of the missing dark matter, if we can find a few more of them.
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This is much more complicated than just that.
The issues for the missing Dark Matter for galaxy rotation amd cluster dynamics is different than the Critical Density missing Matter, and I am not gong into the DM/DE in this thread! However, your statement for the missing Critical Matter for Omega = 1, is well founded, and what I am showing will shed a whole new light on that.
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Originally Posted by dgavin
But as far as what starts the star triggering process in a galaxy, I think it's a safe bet to say that that begins by gravitational forces during a close pass with another galaxy. There are plenty of examples of this on Hubble Site of galaxies undergoing a star formation burst.
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Yes, that is what has been thought all along, which is a direct result of the current paradigm, that galaxies form 'bottom up' or 'top down' through galaxy or proto-galaxy mergers.
So where are the clusters of stars meging to form the Ghost galaxy? and it says that is all by itself, no galaxy perturbation.
Here are other examples.
http://lanl.arxiv.org/abs/astro-ph/0406205
http://www.xs4all.nl/~carlkop/backyard.html
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LSB galaxies, on the other hand, are commonly found in quite empty regions of space. With little external influence on their internal circumstances, the process of star formation is not triggered efficiently, leaving vast reservoirs of gas but only a few young, bright stars.
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Originally Posted by dgavin
My gut feeling is that these dark dwarf galaxies will account for about 10% of the missing mass of the universe.
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It's not just the dwarfs as the second link above shows, plus I have other examples. Also, if you noticed in the OP, the Ghost Galaxy isn't really a dwarf!
Plus, it will wind up being way more than just 10%!
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Originally Posted by dgavin
I devoutly hope someone thinks of using that same detection process in some of the dark area's between the galaxy clusters. We might find some dark mega clusters out there.
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I think I said somewhere in here once, that we can now learn much more from looking into the darkness, than we can by looking at the brightest stuff. But, they are looking everywhere, and figuring out the Quasars is very important also!
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Originally Posted by dgavin
As to the making of the new galaxy itself, I don't think a naked sigularity built the matter from a GRB. Gamma rays are the most energetic form of light, and less likely to be absorbed or lose thier energy to mass conversion then other forms of light.
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Actually, dgavin, this is not true. The higher GEV energy gamma rays are mostly absorbed and almost all The TEV energy gamma rays are absorbed before they reach the earth, and then the ones that do are further absorbed/interact with the atmosphere, and so cannot reach ground telescopes.
Thanks for your response. Hope this helps clear a few things up.