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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 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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