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Horizon-scale variability of M87* from 2017–2021 EHT observations

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A new result from the team behind ptiede/Comrade.jl at the Event Horizon Telescope (EHT) collaboration has discovered an unexpected flip in the measured polarization of the magnetic fields around the supermassive black hole, M87*. Using Julia, this team was able to detect the magnetic spirals first spiraling one way in 2017, settling in 2018, and then reversing direction in 2021, indicating a dynamic environment with changing polarization patterns.

Package: ptiede/Comrade.jl

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See the EHT press release here, or read more in their paper published in Astronomy & Astrophysics.

  1. The Event Horizon Telescope Collaboration, Akiyama, K., Albentosa-Ruíz, E., Alberdi, A., Alef, W., Carlos Algaba, J., … Matthew Young, R. (2025). Horizon-scale variability of M87* from 2017–2021 EHT observations. Astronomy and Astrophysics. doi:10.1051/0004-6361/202555855

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