First M87 Polarization Results from the Event Horizon Telescope

The Event Horizon Telescope (EHT) collaboration has recently released linear-polarimetric images of the near-horizon region around the M87 black hole. These images reveal a polarization structure that peaks in the southwestern part of the image and exhibits an azimuthally symmetric pattern of linear polarization position angles. In this talk, I will summarize the results and describe how theoretical modeling and numerical simulations were used to process the measurements and infer the magnetic field structure and plasma properties near the black hole as an extension to the original total-intensity 2019 EHT publications. I will conclude by briefly discussing potential future black hole measurements that could be performed with the next generation of EHT-like instruments.