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Supermassive black holes

Together at last

The X-ray light curve of the debris from a star torn apart by a supermassive black hole provides the best evidence yet for two such black holes orbiting close to each other.

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Figure 1: Dual active galactic nuclei in the merging galaxy NGC 1128.

© UNIVERSITY OF HERTFORDSHIRE

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Correspondence to Martin Gaskell.

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Gaskell, M. Together at last. Nature Phys 10, 481–482 (2014). https://doi.org/10.1038/nphys3015

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