That story isn't very clear. Since the LMC is far smaller than the Milky Way, how will it "swell our black hole by a factor of eight and the stellar halo, ... will increase fivefold"?
It may contribute to the halo as yet another star stream like the existing Sagittarius Stream and several others, but it will take a very long time before its core merges with our central black hole - and how can that core be seven times the size of our own?
Biting the hand that feeds IT
