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Fig. 4


2QZJ0028: a) white contours show the continuum emission from 2QZJ0028 at 3 mm with a bean of 0.64′′×0.53′′. Contours are at the level of 3, 5 and 7 times the noise per beam (12 μJy). The color background image shows the continuum emission in H-band from SINFONI data of 2QZJ0028. b) ALMA spectrum extracted from an aperture as large as the beam size and rebinned to 60 km s-1. The vertical dashed green line mark the expected positions for CO(32) emission line at the redshifted of the narrow Hα component (Cano-Díaz et al. 2012): the line is not detected. An emission line is detected at a velocity of ~ − 2000 km s-1 with respect to the redshift of 2QZJ0028. c) CO(32) surface brightness. Black solid contours are at the levels of 2σ, 3σ, 4σ and 5σ, where σ is 0.03 Jy/beam km s-1. The white contours show the continuum emission at 3 mm at the levels of 3, 6, and 9 times the sensitivity of the continuum map. The synthesised beam is shown in the bottom-left corner.

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