The Lockman-SpReSO project. Galactic flows in a sample of far-infrared galaxies

Methods. We performed measurements of the , , , , and spectral lines present in the spectra of the selected sample to determine the EW and velocity of the flows observed in the star-forming galaxies. Subsequently, we conducted 10^7 bootstrap simulations using Spearman's rank correlation coefficient (ρ_s) to explore correlations with galaxy properties. Furthermore, we calculated the covering factor, gas density, and optical depth for the measured FeII doublets. Results. Our analysis revealed strong correlations between the EW of MgII lines and both M_* (ρ_s=0.43, 4.5σ) and SFR (ρ_s=0.42, 4.4σ). For the FeII lines, we observed strong correlations between the EW and SFR (ρ_s∼0.65, >3.9σ), with a weaker correlation for M_* (ρ_s∼0.35, >1.9σ). No notable correlations were found between velocity measurements of MgII line and M_*, SFR, or sSFR of the objects (ρ_s∼0.1). However, a negative strong correlation was found between the velocity of the FeII lines and the SFR of the galaxies (ρ_s∼-0.45, ∼3σ). Our results align with previous studies but studying FIR-selected objects. Finally, we detected a candidate loitering outflow, a recently discovered subtype of FeLoBAL quasar, at redshift of z=1.4399, exhibiting emission in CIII] and low line velocities (|v|≲ 200 km/s).