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Fig. 1

image

HST/WFPC2 exposure of VY CMa using the F1042M filter (Smith et al. 2001) corrected for proper motion. The data has been truncated at 5000 counts per second and scaled with a power cycle of −1.5 to highlight the extended emission in the SW direction. The contours represent the ALMA data at 321 GHz (white) and 658 GHz (black) and the corresponding synthesized beams are located in the bottom left of the image. The 321 GHz contour levels are set at [5, 10, 30, 50, 100,....,300] × σrms, while the 658 GHz contour levels are set at [3,6,9,20,30,40,50] × σrms.

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