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Comment Re:simplest thing ever (Score 1) 92

Perhaps dark matter is "simply" right handed neutrinos -- which by virtue of their relationship to the light, left handed neutrinos would be massive -- and hence currently "cold"?

A puzzle:

Since matter with no electric charge can not form "atoms" -- and matter with no quark charge can not form "nucleons" , there is nothing to stop a concentration of dark matter, say, the mass of a star, from gravitationally collapsing very quickly to a rotating, uncharged black hole.
And once dark matter is safely quarantined in a black hole it can interact with matter -- including dark matter quite readily.
So, why isn't the galaxy riddled with black hole "trails" through interstellar gas like electron trails through a cloud chamber?

A 2 for 1 Solution:

Perhaps in the very early universe most of the dark matter quickly formed micro black holes -- most of which evaporated via Hawking radiation -- and perhaps that radiation pressure is what is driving the more rapid expansion of the early universe attributed to "dark" energy?

SO, perhaps the "missing mass" dark matter in most galaxies is "just" micro-black holes that haven't yet evaporated and free right handed neutrinos ?
Perhaps NGC 4736 is simply in a region of space-time where most of the early right hand neutrinos formed primordial black holes that have mostly evaporated?

The universe. Damn queer place.

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