Deep UNCOVER-ALMA Legacy high-Z survey (DUALZ)

DUALZ features a contiguous 4'x6' ALMA 30GHz-wide mosaic in Band 6, covering areas of {mu}>2 down to a sensitivity of {sigma}=32.7{mu}Jy. Through a blind search, we identified 69 dust continuum sources at a signal-to-noise ratio (SNR) >~5.0 with median redshift and intrinsic 1.2mm flux of z=2.30 and S_1.2mm_^int^=0.24mJy.

Of these, 27 have been spectroscopically confirmed, leveraged by the latest NIRSpec observations, while photometric redshifts are also constrained by the comprehensive Hubble Space Telescope (HST), NIRCam, and ALMA data sets for the remaining sources. With priors, we further identify a [CII]158{mu}m line emitter at z=6.3254+/-0.0004, confirmed by the latest NIRSpec spectroscopy. The NIRCam counterparts of the 1.2mm continuum exhibit undisturbed morphologies, denoted either by disk or spheroid, implying the triggers for the faint millimeter emission are less catastrophic than mergers.