The reverse shock in 3D He | 1.083 um emission from fast ejecta interacting with the reverse shock (Larsson et al. 2023) Two graphs showing a blue and green ring-like structure. Two other renderings show a wireframe hourglass-shaped structure with a ring in the middle. Traces CSM between the rings — bubble-like structure instead of previously assumed hour glass or conical “walls” connecting the rings.
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