23 May 2017
Tangoing pairs of hungry supermassive black holes grow in number
By Shannon Hall
They’re the most massive mates in the universe — and we have found more of them. Astronomers have raised the number of known pairs of supermassive black holes by about 50 per cent, thanks to a clever new way to sift through existing data.
It’s a crucial step towards discovering how supermassive black holes became, well, supermassive. At present, that recipe calls for colossal collisions, but many questions remain.
https://www.newscientist.com/article/2132226-tangoing-pairs-of-hungry-supermassive-black-holes-grow-in-number/
