These stars were formed from gas clouds in galaxies. Wouldn't a gravitational slingshot with ∆v greater than galactic escape velocity likely strip their planets

These stars were formed from gas clouds in galaxies. Wouldn't a gravitational slingshot with ∆v greater than galactic escape velocity likely strip their planets? Unless you mean the ex-planets themselves would end up alone intergalactic space. Apparently, the vocabulary used for such objects is, "sub-brown dwarf."[1] 1. http://en.wikipedia.org/wiki/WISE_0855%E2%88%920714 http://en.wikipedia.org/wiki/WISE_0855%E2%88%920714