摘要：We derive rotation curves, surface brightness profiles, and oxygen abundance distributions for 147 late-type galaxies using the publicly available spectroscopy obtained by the MaNGA survey. Changes of the central oxygen abundance (O/H)0, the abundance at the optical radius (O/H)R25, and the abundance gradient with rotation velocityVrotwere examined for galaxies with rotation velocities from 90 km s−1to 350 km s−1. We find that each relation shows a break atVrot∗∼ 200 km s−1. The central (O/H)0abundance increases with risingVrotand the slope of the (O/H)0–Vrotrelation is steeper for galaxies withVrot≲Vrot∗. The mean scatter of the central abundances around this relation is 0.053 dex. The relation between the abundance at the optical radius of a galaxy and its rotation velocity is similar; the mean scatter in abundances around this relation is 0.081 dex. The radial abundance gradient expressed in dex/kpc flattens with the increase of the rotation velocity. The slope of the relation is very low for galaxies withVrot≳Vrot∗. The abundance gradient expressed in dex/R25is roughly constant for galaxies withVrot≲Vrot∗, flattens towardsVrot∗, and then again is roughly constant for galaxies withVrot≳Vrot∗. The change of the gradient expressed in terms of dex/hd(wherehdis the disc scale length), in terms of dex/Re, d(whereRe, dis the disc effective radius), and in terms of dex/Re, g(whereRe, gis the galaxy effective radius) with rotation velocity is similar to that for gradient in dex/R25. The relations between abundance characteristics and other basic parameters (stellar mass, luminosity, and radius) are also considered.
关键词：engalaxies: abundancesgalaxies: kinematics and dynamicsgalaxies: ISM
