Astronomy and Astrophysics, volume 623A, 122-122 (2019/3-1)
Relations between abundance characteristics and rotation velocity for star-forming MaNGA galaxies.
PILYUGIN L.S., GREBEL E.K., ZINCHENKO I.A., NEFEDYEV Y.A. and VILCHEZ J.M.
Abstract (from CDS):
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 Vrot were examined for galaxies with rotation velocities from 90km/s to 350km/s. We find that each relation shows a break at Vrot*∼200km/s. The central (O/H)0 abundance increases with rising Vrot and the slope of the (O/H)0-Vrot relation is steeper for galaxies with Vrot≤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 with Vrot≥Vrot*. The abundance gradient expressed in dex/R25 is roughly constant for galaxies with Vrot≤Vrot*, flattens towards Vrot*, and then again is roughly constant for galaxies with Vrot≥Vrot*. The change of the gradient expressed in terms of dex/hd (where hd is the disc scale length), in terms of dex/Re,d (where Re,d is the disc effective radius), and in terms of dex/Re,g (where Re,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.
© ESO 2019
galaxies: abundances - galaxies: kinematics and dynamics - galaxies: ISM
VizieR on-line data:
<Available at CDS (J/A+A/623/A122): tablea1.dat>
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