NGC1052-DF2 Diffuse Galaxy without dark matter

[[Mod. note -- I have added "" to mark quoted material (not written
by the author of this article. -- jt]]

Martin Brown

What do people think of the recent claim in Nature that one of the new
wide field instruments has found a candidate diffuse galaxy NGC1052-DF2
which appears to have little or no dark matter in it?
Dynamically can anyone see how a bunch of stars could be peeled off by a
galaxy galaxy interaction without also taking dark matter with it?

Thanks for any enlightenment.

--
Regards,
Martin Brown

Not a galaxy/galaxy interaction. But, perhaps another way.
When Voids merge they sometimes pinch outlying galaxies
out of a cluster. Those galaxies inside Voids are less luminous
than others. They also tend to be less structured. And finally,
because the Voids are the centers of expansion, and the expansion
overwhelms the gravity across the Universe; the gravitational
fields of Dark Matter inside Voids will also be more diffuse due
to its lower density.

BJ