Ghostly galaxy without dark matter baffles astronomers

[Admin]

Astronomers have stumbled upon yet another ghostly galaxy that appears to be devoid of dark matter, the elusive stuff that makes up most of the material universe.

Ghostly galaxy without dark matter baffles astronomers : Read more

 

[Ed Stauffer]

If dark matter phase transitions like most other things then once stars are formed they could eject the dark matter in its gaseous form which could be stolen by a passing galaxy without an actual collision..

 

[Unclear Engineer]

I keep reading about how dark matter can be gravitationally "stolen" from regular matter - but how that could occur does not ever seem to be explained, physically.

Why would dark matter be more likely to be gravitationally attracted than regular matter to something else with mass that is passing by? In a vacuum, feathers and stones fall at the same rate.

I expect somebody will try to explain it with tidal forces, but those require rotations, and would still not explain how all of the dark matter gets stripped from the near side, far side and center of a galaxy.

And, if all galaxies had dark matter to begin with, how can one strip it from another without having some of its own stripped back the other way?

I challenge anybody to show a simulation where two galaxies pass, or even "collide" in some sort of pass-through fashion, and only one of them ends up with all of the dark matter that was originally in both.