INSIGHTS ON THE STELLAR MASS-METALLICITY RELATION FROM THE CALIFA SURVEY

被引：96

作者：

Gonzalez Delgado, R. M. ^{[1
]}

Cid Fernandes, R. ^{[2
]}

Garcia-Benito, R. ^{[1
]}

Perez, E. ^{[1
]}

de Amorim, A. L. ^{[2
]}

Cortijo-Ferrero, C. ^{[1
]}

Lacerda, E. A. D. ^{[2
]}

Lopez Fernandez, R. ^{[1
]}

Sanchez, S. F. ^{[1
,3
,4
]}

Vale Asari, N. ^{[2
]}

Alves, J. ^{[5
]}

Bland-Hawthorn, J. ^{[6
]}

Galbany, L. ^{[7
,8
]}

Gallazzi, A. ^{[9
,10
]}

Husemann, B. ^{[11
,12
]}

Bekeraite, S. ^{[12
]}

Jungwiert, B. ^{[13
]}

Lopez-Sanchez, A. R. ^{[14
]}

de Lorenzo-Caceres, A. ^{[15
]}

Marino, R. A. ^{[16
]}

Mast, D. ^{[17
]}

Molla, M. ^{[18
]}

del Olmo, A. ^{[1
]}

Sanchez-Blazquez, P. ^{[19
]}

van de Ven, G. ^{[20
]}

Vilchez, J. M. ^{[1
]}

Walcher, C. J. ^{[12
]}

Wisotzki, L. ^{[12
]}

Ziegler, B. ^{[5
]}

机构：

[1] CSIC, Inst Astrofis Andalucia, E-18008 Granada, Spain

[2] Univ Fed Santa Catarina, Dept Fis, BR-88040900 Florianopolis, SC, Brazil

[3] Calar Alto CSIC MPG, Ctr Astron Hispano Aleman, E-04004 Almeria, Spain

[4] Univ Nacl Autonoma Mexico, Inst Astron, Mexico City 04510, DF, Mexico

[5] Univ Vienna, A-1180 Vienna, Austria

[6] Univ Sydney, Sydney Inst Astron, Sydney, NSW 2006, Australia

[7] Univ Chile, Millennium Inst Astrophys, Santiago, Chile

[8] Univ Chile, Dept Astron, Santiago, Chile

[9] INAF, Osservatorio Astrofis Arcetri, I-50125 Florence, Italy

[10] Univ Copenhagen, Niels Bohr Inst, Dark Cosmol Ctr, DK-2100 Copenhagen, Denmark

[11] European So Observ, D-85748 Garching, Germany

[12] Leibniz Inst Astrophys Potsdam, D-14482 Potsdam, Germany

[13] Acad Sci Czech Republ, Inst Astron, Vvi, Prague 14131, Czech Republic

[14] Australian Astron Observ, N Ryde, NSW 1670, Australia

[15] Univ St Andrews, Sch Phys & Astron, St Andrews KY16 9SS, Fife, Scotland

[16] Univ Complutense Madrid, Fac CC Fis, Dept Astrofis & CC Atmosfera, UCM UPM, E-28040 Madrid, Spain

[17] Ctr Brasileiro Pesquisas Fis, Inst Cosmol Relatividade & Astrofis ICRA, BR-22290180 Rio De Janeiro, RJ, Brazil

[18] CIEMAT, Dept Invest Basica, E-28040 Madrid, Spain

[19] Univ Autonoma Madrid, Dept Fis Teor, E-28049 Madrid, Spain

[20] Max Planck Inst Astron, D-69117 Heidelberg, Germany

来源：

ASTROPHYSICAL JOURNAL LETTERS | 2014年 / 791卷 / 01期

关键词：

galaxies: evolution; galaxies: fundamental parameters; galaxies: stellar content; galaxies: structure; GALAXIES; EVOLUTION;

D O I：

10.1088/2041-8205/791/1/L16

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

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(star)) relates to the total stellar mass (M-star) and the local mass surface density (mu(star)) in both spheroidal-and disk-dominated galaxies. The galaxies are shown to follow a clear stellar mass-metallicity relation (MZR) over the whole 10(9)-10(12) M-circle dot 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 mu(star) and Z(star) (the mu ZR), betraying the influence of local factors in determining Z(star). This shows that both local (mu(star)-driven) and global (M-star-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, mu(star) regulates Z(star), producing a strong mu ZR whose amplitude is modulated by M-star. In spheroids it is M-star that dominates the physics of star formation and chemical enrichment, with mu(star) 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.

引用

页数：5

共 17 条

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