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Photon Ring Astrometry. I. A Simple Spin Measurement Technique for High-resolution Images of M87*

  • Authors: Delilah E. A. Gates, Dominic O. Chang, Aaron Held, Daniel C. M. Palumbo

Delilah E. A. Gates et al 2026 The Astrophysical Journal 1007 .

  • Provider: AAS Journals

Caption: Figure 7.

Normalized shifts in images of GRMHD SANE simulations viewed at θo  =  17. The simulation shifts (scattered points) are compared to the best-fit mean shift values of the equatorial ring model (﹩{\bar{S}}_{\parallel ,{\rm{erm}}}﹩ Equation (3) and ﹩{\bar{S}}_{\perp ,{\rm{erm}}}﹩ Equation (4); lines). The coloring, marker style, and line style conventions match those used for the MAD simulations in Figure 4.

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