SIMBAD references

2013ApJ...763....9Y - Astrophys. J., 763, 9 (2013/January-3)

The metallicity evolution of star-forming galaxies from redshift 0 to 3: combining magnitude-limited survey with gravitational lensing.


Abstract (from CDS):

We present a comprehensive observational study of the gas-phase metallicity of star-forming galaxies from z ∼ 0 ⟶ 3. We combine our new sample of gravitationally lensed galaxies with existing lensed and non-lensed samples to conduct a large investigation into the mass-metallicity (MZ) relation at z > 1. We apply a self-consistent metallicity calibration scheme to investigate the metallicity evolution of star-forming galaxies as a function of redshift. The lensing magnification ensures that our sample spans an unprecedented range of stellar mass (3x107 to 6x1010 M). We find that at the median redshift of z = 2.07, the median metallicity of the lensed sample is 0.35 dex lower than the local SDSS star-forming galaxies and 0.18 dex lower than the z ∼ 0.8 DEEP2 galaxies. We also present the z ∼ 2 MZ relation using 19 lensed galaxies. A more rapid evolution is seen between z ∼ 1 ⟶ 3 than z ∼ 0 ⟶ 1 for the high-mass galaxies (109.5 M < M{sstarf}< 1011 M), with almost twice as much enrichment between z ∼ 1 ⟶ 3 than between z ∼ 1 ⟶ 0. We compare this evolution with the most recent cosmological hydrodynamic simulations with momentum-driven winds. We find that the model metallicity is consistent with the observed metallicity within the observational error for the low-mass bins. However, for higher masses, the model overpredicts the metallicity at all redshifts. The overprediction is most significant in the highest mass bin of 1010-1011 M.

Abstract Copyright:

Journal keyword(s): galaxies: abundances - galaxies: evolution - galaxies: high-redshift - gravitational lensing: strong

Nomenclature: Tables 4-5: [YKR2013] MS1 N=1, [YKR2013] MS-Jm7 N=1, [YKR2013] MSnewz3 N=1, [YKR2013] GN (Nos G2-G3), [YKR2013] Lowz1.36 N=1.

Simbad objects: 20

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