Is There a Dark Matter Interaction?

The idea for these combination stars is that maybe they were the first kind of stars in the universe. So then the ideas, you have this like blob of dark matter sitting inside a cloud of normal matter,. And the blob of dark matters bumping into itself, annihilating and producing radiation which prevents the cloud from collapsing. But according to their calculations, it's not something we can rule out. It would be a rare thing to happen, because if it happened a lot, we would have seen it already.