YOUNG, STAR-FORMING GALAXIES AND THEIR LOCAL COUNTERPARTS: THE EVOLVING RELATIONSHIP OF MASS-SFR-METALLICITY SINCE z ∼ 2.1

被引：11

作者：

Gebhardt, Henry S. Grasshorn ^{[1
,2
]}

Zeimann, Gregory R. ^{[1
,2
]}

Ciardullo, Robin ^{[1
,2
]}

Gronwall, Caryl ^{[1
,2
]}

Hagen, Alex ^{[1
,2
]}

Bridge, Joanna S. ^{[1
,2
]}

Schneider, Donald P. ^{[1
,2
]}

Trump, Jonathan R. ^{[1
,2
]}

机构：

[1] Penn State Univ, Dept Astron & Astrophys, 525 Davey Lab, University Pk, PA 16802 USA

[2] Penn State Univ, Inst Gravitat & Cosmos, University Pk, PA 16802 USA

来源：

ASTROPHYSICAL JOURNAL | 2016年 / 817卷 / 01期

关键词：

cosmology: observations; galaxies: evolution; galaxies: formation; galaxies: high-redshift; EMISSION-LINE GALAXIES; FMOS-COSMOS SURVEY; LY-ALPHA EMITTERS; STELLAR MASS; DUST ATTENUATION; CHEMICAL-COMPOSITION; FORMATION HISTORIES; NEBULAR EMISSION; IONIZATION STATE; GAS METALLICITY;

D O I：

10.3847/0004-637X/817/1/10

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We explore the evolution of the Stellar Mass-Star Formation Rate (SFR)-Metallicity relation using a set of 256 COSMOS and GOODS galaxies in the redshift range 1.90 < z < 2.35. We present the galaxies' rest-frame optical emission-line fluxes derived from IR-grism spectroscopy with the Hubble Space Telescope. and combine these data with SFRs and stellar masses obtained from deep, multi-wavelength (rest-frame UV to IR) photometry. We then compare these measurements to those for a local sample of galaxies carefully matched in stellar mass (7.5 less than or similar to log(M-*/M-circle dot) less than or similar to 10.5) and SFR (-0.5 less than or similar to log(SFR) less than or similar to 2.5 in M-circle dot yr(-1)). We find that the distribution of z similar to 2.1 galaxies in stellar mass-SFR-metallicity space is clearly different from that derived for our sample of similarly bright (L-H beta >3 x 10(40) erg s(-1)) local galaxies, and this offset cannot be explained by simple systematic offsets in the derived quantities. At stellar masses above similar to 10(9) M-circle dot and SFRs above similar to 10 M-circle dot yr(-1), the z similar to 2.1 galaxies have higher oxygen abundances than their local counterparts, while the opposite is true for lower-mass, lower-SFR systems.

引用

页数：19

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