skip to main content

Title: A CONSISTENT STUDY OF METALLICITY EVOLUTION AT 0.8 < z < 2.6

We present the correlations between stellar mass, star formation rate (SFR), and the [N II]/Hα flux ratio as an indicator of gas-phase metallicity for a sample of 222 galaxies at 0.8 < z < 2.6 and log (M {sub *}/M {sub ☉}) = 9.0-11.5 from the LUCI, SINS/zC-SINF, and KMOS{sup 3D} surveys. This sample provides a unique analysis of the mass-metallicity relation (MZR) over an extended redshift range using consistent data analysis techniques and a uniform strong-line metallicity indicator. We find a constant slope at the low-mass end of the relation and can fully describe its redshift evolution through the evolution of the characteristic turnover mass where the relation begins to flatten at the asymptotic metallicity. At a fixed mass and redshift, our data do not show a correlation between the [N II]/Hα ratio and SFR, which disagrees with the 0.2-0.3 dex offset in [N II]/Hα predicted by the ''fundamental relation'' between stellar mass, SFR, and metallicity discussed in recent literature. However, the overall evolution toward lower [N II]/Hα at earlier times does broadly agree with these predictions.
Authors:
; ; ; ; ; ; ; ; ; ; ; ; ; ; ;  [1] ;  [2] ;  [3] ; ;  [4] more »; « less
  1. Max-Planck-Institut für extraterrestrische Physik, Giessenbachstr. 1, D-85741 Garching (Germany)
  2. Space Telescope Science Institute, Baltimore, MD 21218 (United States)
  3. Universitäts-Sternwarte München, Scheinerstr. 1, D-81679 München (Germany)
  4. Institute of Astronomy, Department of Physics, Eidgensösische Technische Hochschule, ETH Zürich, CH-8093 (Switzerland)
Publication Date:
OSTI Identifier:
22365642
Resource Type:
Journal Article
Resource Relation:
Journal Name: Astrophysical Journal Letters; Journal Volume: 789; Journal Issue: 2; Other Information: Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; ASYMPTOTIC SOLUTIONS; CORRELATIONS; DATA ANALYSIS; GALAXIES; INDICATORS; MASS; METALLICITY; RED SHIFT; STAR EVOLUTION; STARS