Left: Log extinction at Hβ, c, to NGC 7009 based on the 120 s Hβ and Paschen P9–P12 images and the 10 s Hα flux image, with all images corrected for the contamination by He II and convolved with Gaussians to the same FWHM for all images, that of the Hβ image with FWHM 0.56′′. Right: Log10 Hβ surface brightness image of NGC 7009 based on the 120 s MUSE cube.
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