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Astrophysics

A tight duo in a trio of black holes

Tight pairs of supermassive black holes are expected to emit gravitational waves that could give astronomers a new way to explore the cosmos. One relatively tight pair has been discovered within a rare triple system. See Letter p.57

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Figure 1: A tight binary.

VLBA Image Courtesy of NRAO/AUI/NSF

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Correspondence to Greg Taylor.

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Taylor, G. A tight duo in a trio of black holes. Nature 511, 35–36 (2014). https://doi.org/10.1038/nature13511

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