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Inference on inner galaxy structure via gravitational waves from supermassive binaries

The lowest-frequency gravitational wave background may be shaped by supermassive black hole binaries that scatter nearby stars or dark matter. In this case, the NANOGrav 15-year dataset favours dense galactic centres with 10⁶ solar masses per cubic parsec.

Yifan Chen
Matthias Daniel
Olivia Young
Research05 Feb 2026
Nature Astronomy

P: 1-10

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Inference on inner galaxy structure via gravitational waves from supermassive binaries

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