Drivers of asymmetry in synthetic H i emission-line profiles of galaxies in the eagle simulation

We study the shapes of spatially integrated H I emission-line profiles galaxies in EAGLE simulation using three separate measures profile's asymmetry. show that subset whose gas fractions and stellar masses are consistent with those xGASS survey also have similar line asymmetries. Central symmetric typically correspond to rotationally supported disks, but asymmetric may or not dispersion-dominated systems. Galaxies emission lines are, on average, more rich than lines, exhibit systematic differences their specific star formation rates, suggesting turbulence generated by AGN feedback be one factor contributing The asymmetry correlates strongly dynamical state a galaxy's host dark matter halo: older, relaxed haloes more-symmetric hosted unrelaxed ones. At fixed halo mass, centrals tend surrounded larger number massive subhaloes counterparts, experience higher rates accretion outflow. central have, satellites; for latter, ram pressure tidal stripping significant sources