The MOSDEF Survey: A Stellar Mass-SFR-Metallicity Relation Exists at z ∼ 2.3

被引：107

作者：

Sanders, Ryan L. ^{[1
]}

Shapley, Alice E. ^{[1
]}

Kriek, Mariska ^{[2
]}

Freeman, William R. ^{[3
]}

Reddy, Naveen A. ^{[3
]}

Siana, Brian ^{[3
]}

Coil, Alison L. ^{[4
]}

Mobasher, Bahram ^{[3
]}

Dave, Romeel ^{[5
]}

Shivaei, Irene ^{[6
]}

Azadi, Mojegan ^{[4
]}

Price, Sedona H. ^{[7
]}

Leung, Gene ^{[4
]}

Fetherholf, Tara ^{[3
]}

de Groot, Laura ^{[8
]}

Zick, Tom ^{[2
]}

Fornasini, Francesca M. ^{[9
]}

Barro, Guillermo ^{[10
]}

机构：

[1] Univ Calif Los Angeles, Dept Phys & Astron, 430 Portola Plaza, Los Angeles, CA 90095 USA

[2] Univ Calif Berkeley, Astron Dept, Berkeley, CA 94720 USA

[3] Univ Calif Riverside, Dept Phys & Astron, 900 Univ Ave, Riverside, CA 92521 USA

[4] Univ Calif San Diego, Ctr Astrophys & Space Sci, 9500 Gilman Dr, La Jolla, CA 92093 USA

[5] Univ Edinburgh, Inst Astron, James Clerk Maxwell Bldg,Peter Guthrie Tait Rd, Edinburgh EH9 3FD, Midlothian, Scotland

[6] Steward Observ, Dept Astron, 933 North Cherry Ave,Room N204, Tucson, AZ 85721 USA

[7] Max Planck Inst Extraterr Phys, Postfach 1312, D-85741 Garching, Germany

[8] Coll Wooster, Dept Phys, 1189 Beall Ave, Wooster, OH 44691 USA

[9] Harvard Smithsonian Ctr Astrophys, 60 Garden St, Cambridge, MA 02138 USA

[10] Univ Pacific, Dept Phys, 3601 Pacific Ave, Stockton, CA 95211 USA

来源：

ASTROPHYSICAL JOURNAL | 2018年 / 858卷 / 02期

关键词：

galaxies: abundances; galaxies: high redshift; STAR-FORMING GALAXIES; SPECTRAL ENERGY-DISTRIBUTION; CHEMICAL ABUNDANCES; FUNDAMENTAL RELATION; FORMATION HISTORIES; PHYSICAL-PROPERTIES; STARBURST GALAXIES; HII-REGIONS; GAS; EVOLUTION;

D O I：

10.3847/1538-4357/aabcbd

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We investigate the nature of the relation among stellar mass, star formation rate, and gas-phase metallicity (the M-*-SFR-Z relation) at high redshifts using a sample of 260 star-forming galaxies at z similar to 2.3 from the MOSDEF survey. We present an analysis of the high-redshift M-*-SFR-Z relation based on several emission-line ratios for the first time. We show that a M-*-SFR-Z relation clearly exists at z similar to 2.3. The strength of this relation is similar to predictions from cosmological hydrodynamical simulations. By performing a direct comparison of stacks of z similar to 0 and z similar to 2.3 galaxies, we find that z similar to 2.3 galaxies have similar to 0.1. dex lower metallicity at fixed M-* and SFR. In the context of chemical evolution models, this evolution of the M-*-SFR-Z relation suggests an increase with redshift of the mass-loading factor at fixed M-*, as well as a decrease in the metallicity of infalling gas that is likely due to a lower importance of gas recycling relative to accretion from the intergalactic medium at high redshifts. Performing this analysis simultaneously with multiple metallicity-sensitive line ratios allows us to rule out the evolution in physical conditions (e.g., N/O ratio, ionization parameter, and hardness of the ionizing spectrum) at fixed metallicity as the source of the observed trends with redshift and with SFR at fixed M-* at z similar to 2.3. While this study highlights the promise of performing high-order tests of chemical evolution models at high redshifts, detailed quantitative comparisons ultimately await a full understanding of the evolution of metallicity calibrations with redshift.

引用

页数：18

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