Bright extragalactic ALMA redshift survey (BEARS) III: detailed study of emission lines from 71 <i>Herschel</i> targets

We analyse the molecular and atomic emission lines of 71 bright Herschel-selected galaxies between redshifts 1.4 to 4.6 detected by Atacama Large Millimetre/submillimetre Array. These include a total 156 CO, [C I], H2O lines. For 46 galaxies, we detect two transitions CO lines, for these find gas properties similar those other dusty star-forming galaxy (DSFG) samples. A comparison photo-dissociation models suggests that most have interstellar medium conditions as local infrared-luminous high-redshift DSFGs, although with denser more intense far-ultraviolet radiation fields than normal galaxies. The line luminosities agree luminosity scaling relations across five orders magnitude, star-formation surface density distributions (i.e., Schmidt-Kennicutt relation) suggest different phase in our (and DSFGs) compared low-redshift gas-rich, systems. gas-to-dust ratios are Milky Way values, no apparent redshift evolution. Four sources appear excess expected maximum (thermalized) profile, suggesting rare evolution DSFGs. Finally, create deep stacked spectrum over wide rest-frame frequency (220-890 GHz) reveals faint from HCN CH, previous stacking experiments.