Polarized View of the Black Hole in M87 Galaxy

55 million light years from Earth, the lines mark the orientation of polarization.

via MIT

“ALMA plays a central role in the entire process: it is centrally located to tie the EHT array together, and it is also the most sensitive telescope in the array, so it is crucial to making the most of the EHT data,” says Geoff Crew, Haystack research scientist. “In addition, the years of work on the ALMA polarimetry analysis has delivered far more than we imagined.”

This resolution allowed the team to directly observe the black hole shadow and the ring of light around it, with the new polarized-light image clearly showing that the ring is magnetized. The results are published today in two separate papers in The Astrophysical Journal Letters by the EHT collaboration. The research involved over 300 researchers from multiple organizations and universities worldwide.

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