A 30 kpc Spatially Extended Clumpy and Asymmetric Galactic Outflow at z ∼ 1.7

Abstract We image the spatial extent of a cool galactic outflow with fine-structure Fe ii * emission and resonant Mg in gravitationally lensed star-forming galaxy at z = 1.70347. The (continuum-subtracted) emissions span out to radial distances ∼14.33 26.5 kpc, respectively, maximum extents ∼21 kpc for ∼30 emission. is patchy covers total area ∼184 2 , constraining minimum covered by outflowing gas be ∼13% area. asymmetric shows ∼21% more extended along decl. direction. constrain covering fractions as function distance characterize them power-law model. 2803 line two kinematically distinct components may correspond shells velocity separation Δ v ∼ 400 km s −1 . By using multiple images different magnifications plane, we trace around three individual regions. In all cases, both are spatially compared regions traced [O ] These findings provide robust constraints on and, combined column density measurements, will give stringent mass-outflow rates galaxy.