Redshift survey of ALMA-identified SMGs in ECDFS

We derive spectroscopic redshifts for 52 SMGs, with a median of z=2.4+/-0.1. However, the distribution features a high-redshift tail, with ~23% of the SMGs at z>=3.

Spectral diagnostics suggest that the SMGs are young starbursts, and the velocity offsets between the nebular emission and UV ISM absorption lines suggest that many are driving winds, with velocity offsets of up to 2000km/s. Using the spectroscopic redshifts and the extensive UV-to-radio photometry in this field, we produce optimized spectral energy distributions (SEDs) using Magphys, and use the SEDs to infer a median stellar mass of M_*_=(6+/-1)x10^10^M_{sun}_ for our SMGs with spectroscopic redshift.