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Insights on the stellar mass-metallicity relation from the CALIFA survey

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Date
10/08/2014
Author
Gonzalez Delgado, R. M.
Cid Fernandes, R.
Garcia-Benito, R.
Perez, E.
de Amorim, A. L.
Cortijo-Ferrero, C.
Lacerda, E. A. D.
Lopez Fernandez, R.
Sanchez, S. F.
Vale Asari, N.
Alves, J.
Bland-Hawthorn, J.
Galbany, L.
Gallazzi, A.
Husemann, B.
Bekeraite, S.
Jungwiert, B.
Lopez-Sanchez, A. R.
De Lorenzo-Caceres Rodriguez, Adriana
Marino, R. A.
Mast, D.
Molla, M.
del Olmo, A.
Sanchez-Blazquez, P.
van de Ven, G.
Vilchez, J. M.
Walcher, C. J.
Wisotzki, L.
Ziegler, B.
Funder
Science & Technology Facilities Council
Grant ID
ST/J001651/1
Keywords
galaxies: evolution
galaxies: fundamental parameters
galaxies: stellar content
galaxies: structure
Digital Sky Survey
Field area survey
Spiral galaxies
Evolution
QC Physics
QB Astronomy
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Abstract
We use spatially and temporally resolved maps of stellar population properties of 300 galaxies from the CALIFA integral field survey to investigate how the stellar metallicity (Z*) relates to the total stellar mass (M*) and the local mass surface density (μ*) in both spheroidal- and disk-dominated galaxies. The galaxies are shown to follow a clear stellar mass–metallicity relation (MZR) over the whole 109–1012MΘ range. This relation is steeper than the one derived from nebular abundances, which is similar to the flatter stellar MZR derived when we consider only young stars.We also find a strong relation between the local values of μ* and Z* (the μZR), betraying the influence of local factors in determining Z*. This shows that both local (μ*-driven) and global (M*-driven) processes are important in determining metallicity in galaxies. We find that the overall balance between local and global effects varies with the location within a galaxy. In disks, μ* regulates Z*, producing a strong μZR whose amplitude is modulated by M*. In spheroids it is M* that dominates the physics of star formation and chemical enrichment, with μ* playing a minor, secondary role. These findings agree with our previous analysis of the star formation histories of CALIFA galaxies, which showed that mean stellar ages are mainly governed by surface density in galaxy disks and by total mass in spheroids.
Citation
Gonzalez Delgado , R M , Cid Fernandes , R , Garcia-Benito , R , Perez , E , de Amorim , A L , Cortijo-Ferrero , C , Lacerda , E A D , Lopez Fernandez , R , Sanchez , S F , Vale Asari , N , Alves , J , Bland-Hawthorn , J , Galbany , L , Gallazzi , A , Husemann , B , Bekeraite , S , Jungwiert , B , Lopez-Sanchez , A R , De Lorenzo-Caceres Rodriguez , A , Marino , R A , Mast , D , Molla , M , del Olmo , A , Sanchez-Blazquez , P , van de Ven , G , Vilchez , J M , Walcher , C J , Wisotzki , L & Ziegler , B 2014 , ' Insights on the stellar mass-metallicity relation from the CALIFA survey ' , Astrophysical Journal Letters , vol. 791 , no. 1 , L16 . https://doi.org/10.1088/2041-8205/791/1/L16
Publication
Astrophysical Journal Letters
Status
Peer reviewed
DOI
https://doi.org/10.1088/2041-8205/791/1/L16
ISSN
2041-8205
Type
Journal article
Rights
Copyright 2014. The American Astronomical Society. All rights reserved.
Collections
  • University of St Andrews Research
URI
http://hdl.handle.net/10023/5905

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