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Do black holes get bigger mass is being transferred to them from a companion star?

April 26, 2017Bigger black holes companion mass star transferred

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Do black holes get bigger mass is being transferred to them from a companion star?

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Black holes do get more massive if more mass outside the event horizon is added to them. They may not get bigger in terms of actual size, if they are already infinitely small, but their Schwarzschild radii (event horizons) do increase in size.