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Fig. 6

image

Synthetic images for κ models (left panels) and thermal models (middle panels) for Sgr A* at three different frequencies for an observing angle i = 30° (with respect to the black hole spin axis). The spatial resolution and field of view of our camera is 0.2 GM/c2 and 100 GM/c2 respectively. Overplotted in white are the source sizes estimates, major and minor axis, and orientation of the ellipse, which are calculated by using image moments. Right panels: the additional emission for Sgr A* in the κ = 4 model at three different frequencies. This emission is localized by subtracting the thermal synthetic images from the κ = 4 images.

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