Relations between abundance characteristics and rotation velocity for star-forming MaNGA galaxies

DOI: 
10.1051/0004-6361/201834239
Publication date: 
01/03/2019
Main author: 
Pilyugin, L. S.
IAA authors: 
Vílchez, J. M.
Authors: 
Pilyugin, L. S.;Grebel, E. K.;Zinchenko, I. A.;Nefedyev, Y. A.;Vílchez, J. M.
Journal: 
Astronomy and Astrophysics
Refereed: 
Yes
Publication type: 
Article
Volume: 
623
Pages: 
A122
Abstract: 
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)<SUB>0</SUB>, the abundance at the optical radius (O/H)<SUB>R<SUB>25</SUB></SUB>, and the abundance gradient with rotation velocity V<SUB>rot</SUB> were examined for galaxies with rotation velocities from 90 km s<SUP>-1</SUP> to 350 km s<SUP>-1</SUP>. We find that each relation shows a break at V<SUB>rot</SUB><SUP>∗</SUP> ̃ 200 km s<SUP>-1</SUP>. The central (O/H)<SUB>0</SUB> abundance increases with rising V<SUB>rot</SUB> and the slope of the (O/H)<SUB>0</SUB>-V<SUB>rot</SUB> relation is steeper for galaxies with V<SUB>rot</SUB> ≲ V<SUB>rot</SUB><SUP>∗</SUP>. 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<SUB>rot</SUB> ≳ V<SUB>rot</SUB><SUP>∗</SUP>. The abundance gradient expressed in dex/R<SUB>25</SUB> is roughly constant for galaxies with V<SUB>rot</SUB> ≲ V<SUB>rot</SUB><SUP>∗</SUP>, flattens towards V<SUB>rot</SUB><SUP>∗</SUP>, and then again is roughly constant for galaxies with V<SUB>rot</SUB> ≳ V<SUB>rot</SUB><SUP>∗</SUP>. The change of the gradient expressed in terms of dex/h<SUB>d</SUB> (where h<SUB>d</SUB> is the disc scale length), in terms of dex/R<SUB>e, d</SUB> (where R<SUB>e, d</SUB> is the disc effective radius), and in terms of dex/R<SUB>e, g</SUB> (where R<SUB>e, g</SUB> is the galaxy effective radius) with rotation velocity is similar to that for gradient in dex/R<SUB>25</SUB>. The relations between abundance characteristics and other basic parameters (stellar mass, luminosity, and radius) are also considered.
Database: 
ADS
SCOPUS
URL: 
https://www.scopus.com/inward/record.uri?eid=2-s2.0-85063807079&doi=10.1051%2f0004-6361%2f201834239&partnerID=40&md5=07e72ef6107fae38296755152d122efa
ADS Bibcode: 
2019A&A...623A.122P
Keywords: 
galaxies: abundances;galaxies: kinematics and dynamics;galaxies: ISM;Astrophysics - Astrophysics of Galaxies