The role of gas kinematics in setting metallicity gradients at high redshift

ABSTRACT In this work, we explore the diversity of ionized gas kinematics (rotational velocity vϕ and dispersion σg) gas-phase metallicity gradients at 0.1 ≤ z 2.5 using a compiled data set 74 galaxies resolved with ground-based integral field spectroscopy. We find that highest lowest σg have preferentially flat gradients, whereas those intermediate values show large scatter in gradients. Additionally, steep negative appear almost only rotation-dominated (vϕ/σg > 1), most dispersion-dominated use our recently developed analytical model to provide physical explanation for shape these observed trends. case high σg, inward radial advection dominates over metal production causes efficient mixing, thus giving rise For low it is cosmic accretion metal-poor diluting gives Finally, reason showing steepest both are weak as compared production, which leads creation steeper The larger may be due part preferential ejection metals galactic winds, can decrease strength term. Our analysis shows how play critical role setting high-redshift galaxies.