First definitive detection of intermediate-mass black hole.

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Article

Takekawa explains, "Detailed kinematic analyses revealed that an enormous mass, 30,000 times that of the Sun, was concentrated in a region much smaller than our Solar System. This and the lack of any observed object at that location strongly suggests an intermediate-mass black hole. By analyzing other anomalous clouds, we hope to expose other quiet black holes."

Paper;
Indication of Another Intermediate-mass Black Hole in the Galactic Center
Takekawa, S. et al.
https://iopscience.iop.org/article/10.3847/2041-8213/aafb07/meta (free access)