Researchers discover emission from secondary black hole in binary system of blazar OJ 287

Simultaneous optical flux and polarization light curves of OJ 287 from 2015 to 2023, with the R magnitudes at the bottom and the PD and PA in the middle and upper panels, respectively. Credit: The Astrophysical Journal Letters (2023). DOI: 10.3847/2041-8213/acfd2e

OJ 287 is recognized as a binary black hole system with a slowly spiraling orbit caused by loss of energy to gravitational radiation. This energy loss was already confirmed in 2008. Subsequent measurements have confirmed this orbit…

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News Source: phys.org