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Event Horizon Telescope Pattern Speeds in the Visibility Domain

  • Authors: Nicholas S. Conroy, Michi Bauböck, Vedant Dhruv, Daeyoung Lee, Chi-kwan Chan, Abhishek V. Joshi, Cora Prather, Charles F. Gammie

Nicholas S. Conroy et al 2026 The Astrophysical Journal 1005 .

  • Provider: AAS Journals

Caption: Figure 1.

A 230 GHz snapshot image from a fiducial Sgr A* model (MAD, a* = 0.5, i = 30∘, Rhigh = 160) (left), and the accompanying visibility amplitudes (right). The visibility amplitude color map is logarithmic. The image-domain ring produces a series of damping lobes and nulls, while spiral waves produce spiral features in the (u, v) domain. The helicity of the spiral has flipped, as expected.

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