What are Intermediate Mass Black Holes?
The search found GW190521 to be the most significant IMBH candidate. The shape of the signal GW190521 agrees with that of the merger of two heavyweight BHs with masses 66 and 85 times the sun, forming a remnant BH of mass ~142 times the Sun.
The discovery of this object was announced on Sept 2, 2020 in an earlier publication. This record breaking observation marked the beginning of confident IMBH detections, and opened the possibilities to test the General Theory of Relativity in extreme environments. Using numerically simulated GW190521-like signals, scientists in LIGO/Virgo/KAGRA gave a prediction of how often IMBH mergers can occur in a given volume of the Universe.
(Credit: LIGO-India/Kanchan Soni)
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