Normally, when a massive star reaches the end of its life, its core collapses into a single black hole. But if the star was spinning very rapidly, its core might stretch into a dumbbell shape and fragment into two clumps, each forming its own black hole. A very massive star as needed here often forms out of the merger of two smaller stars.
And since the stars would have revolved around each other faster and faster as they spiraled together, the resulting merged star would be expected to spin very quickly. Hotel Pennsylvania Astronomy Conference 2023 email@skoolsonline.comNormally, when a massive star reaches the end of its life, its core collapses into a single black hole. But if the star was spinning very rapidly, its core might stretch into a dumbbell shape and fragment into two clumps, each forming its own black hole. A very massive star as needed here often forms out of the merger of two smaller stars.