Fig. 7

Left: L′-band image of the surroundings of IRS 1W. Right: highpass-filtered version of the image. The white arrow in the right panel shows the length of the bow-shock tail. It has a length of ~0.8′′, or 6400 AU. The radial lines emanating from the apex of the bow shock of IRS 1W are artifacts of the high-pass filtering.
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