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Fig. 3.
Contour levels of continuum (red) and CO(2–1) line emission (green, at 2σ, 4σ, and 6σ levels) are superimposed on an optical image from the Hubble Space Telescope (HST; F606W filter). The molecular gas follows the same spiral-like pattern as the optical emission. The continuum is produced by a point-like source.
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