Properties and Astrophysical Implications of the 150 M<sub>โ</sub> Binary Black Hole Merger GW190521
Properties and Astrophysical Implications of the 150 M<sub>โ</sub> Binary Black Hole Merger GW190521
The gravitational-wave signal GW190521 is consistent with a binary black hole merger source at redshift 0.8 with unusually high component masses, $85^{+21}_{-14}\,M_{\odot}$ and $66^{+17}_{-18}\,M_{\odot}$, compared to previously reported events, and shows mild evidence for spin-induced orbital precession. The primary falls in the mass gap predicted by (pulsational) pair-instability supernova theory, โฆ