The source of the GW190814 event is still a matter of debate among astrophysicists. While the leading explanation involves the merger of two black holes, some alternative scenarios have been proposed, including the possibility of a black hole-strange quark star system.

A strange quark star is a hypothetical type of star that is thought to be composed primarily of strange quarks. Strange quarks are one of the six types of quarks that make up protons and neutrons, and they are much heavier than the up and down quarks that are found in ordinary matter. This means that strange quark stars are expected to be extremely dense and compact.

If the source of GW190814 was indeed a black hole-strange quark star system, it would suggest that strange quark stars exist and that they can merge with black holes. This would have important implications for our understanding of the nature of matter and the formation of compact objects in the universe.

However, it is important to note that the current evidence is still not conclusive, and further observations and analyses are needed to confirm or rule out different scenarios for the source of GW190814.