NOEMA confirmation of an optically dark ALMA-AzTEC submillimetre galaxy at $z=5.24$. A late-stage starburst prior to quenching

Soh Ikarashi, R. J. Ivison, William I. Cowley +1

We have obtained 1 and 3 mm spectral scans of ASXDF1100.053.1 using NOEMA. ASXDF1100.053.1 is an unlensed optically dark millimetre-bright SMG with $K_{\mathrm{AB}}>25.7$ ($2\sigma$), which…