Top panel: dust and gas morphology and gas kinematics of the Emerald, the main submm arc of PLCK_G165.7+49.0, from single-component Gaussian line fits. Left to right panel: maps of the SMA 850 μm dust and PdBI CO(4–3) morphologies, relative velocity, and Gaussian line FWHM. The arc is composed of two multiple images of the same source, #1.1 on the southern portion and #1.2 on the northern one, respectively (see also Fig. 5). We identify two star-forming clumps per image and focus most of the analysis on the two northern ones, called #1.2 S and #1.2 N. The SMA and PdBI beam FWHMs are 0.90″ × 0.75″ and 0.76″ × 0.75″, respectively. Velocity offsets and line widths are given in km s−1. Contours on the two leftmost panels show the SMA 850 μm dust continuum, starting at +6σ and increasing in steps of +2σ, and those on other panels show the stellar continuum in the F110W band from HST/WFC3. Bottom, left to right panel: same maps for the secondary Gaussian component detected at ≥ 3σ over a region of about 2.5″ × 1.5″ near the center of the arc.
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