2019A&A...623A.122P

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 velocity V_rot were examined for galaxies with rotation velocities from 90km/s to 350km/s. We find that each relation shows a break at V_rot^*∼200km/s. The central (O/H)₀ abundance increases with rising V_rot and the slope of the (O/H)₀-V_rot relation is steeper for galaxies with V_rot≤V_rot^*. 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 with V_rot≥V_rot^*. The abundance gradient expressed in dex/R₂₅ is roughly constant for galaxies with V_rot≤V_rot^*, flattens towards V_rot^*, and then again is roughly constant for galaxies with V_rot≥V_rot^*. The change of the gradient expressed in terms of dex/h_d (where h_d is the disc scale length), in terms of dex/R_e,d (where R_e,d is the disc effective radius), and in terms of dex/R_e,g (where R_e,g is 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.