I read a separate article stating that it's theorized that this star may be comprised of a high level (roughly 1/3 mass) of strange quarks, formed when the much lighter up & down quarks of its constituent nuclei fuse. This is just a theory; this hasn't been observed in any way.

If that is the case, though, I'm not sure how the mechanics of that work. It seems to me that you have to overcome the Pauli exclusion pressure to push two fundamental particles together. But I think this is possible given asymptotic freedom? I guess if it's going to happen anywhere, it would be a neutron(-like) star.