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Astrophysics

A happy medium

The case for the existence of intermediate-mass black holes, hundreds to thousands of times more massive than our Sun, has received a major boost — with implications for gravitational waves and clustered star formation.

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Figure 1: An artist's impression of the candidate intermediate-mass black hole HLX-1 (bright spot just to the left of the bulge) and its spiral galaxy host.

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Miller, M. A happy medium. Nature Phys 5, 537–538 (2009). https://doi.org/10.1038/nphys1356

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