The interstellar medium in [OIII]-selected star-forming galaxies at $z\sim 3.2$

Abstract

We present new results from near-infrared spectroscopy with Keck/MOSFIRE of [OIII]-selected galaxies at $z\sim 3.2$. With our $H$ and $K$-band spectra, we investigate the interstellar medium (ISM) conditions, such as ionization states and gas metallicities. [OIII] emitters at $z\sim 3.2$ show a typical gas metallicity of $12+\log (O/H)=8.07\pm 0.07$ at $\log ({\mathrm{M}}_{\ast }/{\mathrm{M}}_{\odot })\sim 9.0-9.2$ and $12+\log (O/H)=8.31\pm 0.04$ at $\log ({\mathrm{M}}_{\ast }/{\mathrm{M}}_{\odot })\sim 9.7-10.2$ when using the empirical calibration method. We compare the [OIII] emitters at $z\sim 3.2$ with UV-selected galaxies and Ly$\alpha$ emitters at the same epoch and find that the [OIII]-based selection does not appear to show any systematic bias in the selection of star-forming galaxies. Moreover, comparing with star-forming galaxies at $z\sim 2$ from literature, our samples show similar ionization parameters and gas metallicities as those obtained by the previous studies using the same calibration method. We find no strong redshift evolution in the ISM conditions between $z\sim 3.2$ and $z\sim 2$. Considering that the star formation rates at a fixed stellar mass also do not significantly change between the two epochs, our results support the idea that the stellar mass is the primary quantity to describe the evolutionary stages of individual galaxies at $z>2$.

20 pages, 11 figures, Accepted for publication in ApJ

References in corpus (23)

• Cosmic Star Formation History
• The Cosmic Evolution Survey (COSMOS) -- Overview
• EAZY: A Fast, Public Photometric Redshift Code
• Cold streams in early massive hot haloes as the main mode of galaxy formation
• COSMOS Photometric Redshifts with 30-bands for 2-deg2
• The Mass-Metallicity Relation at z~2
• An ultra-deep near-infrared spectrum of a compact quiescent galaxy at z=2.2
• Strong Nebular Line Ratios in the Spectra of z~2-3 Star-forming Galaxies: First Results from KBSS-MOSFIRE
• H-alpha Observations of a Large Sample of Galaxies at z~2: Implications for Star Formation in High Redshift Galaxies
• New fully empirical calibrations of strong-line metallicity indicators in star forming galaxies
• Nebular Emission Line Ratios in z~2-3 Star-Forming Galaxies with KBSS-MOSFIRE: Exploring the Impact of Ionization, Excitation, and Nitrogen-to-Oxygen Ratio
• The MOSDEF Survey: Mass, Metallicity, and Star-formation Rate at z~2.3
• The MOSDEF Survey: Excitation Properties of $z\sim 2.3$ Star-forming Galaxies
• AGN Emission Line Diagnostics and the Mass-Metallicity Relation up to Redshift z~2: the Impact of Selection Effects and Evolution
• HiZELS: a high redshift survey of H-alpha emitters. I: the cosmic star-formation rate and clustering at z=2.23
• A Consistent Study of Metallicity Evolution at 0.8 < z < 2.6
• The Nature of Extreme Emission Line Galaxies at z=1-2: Kinematics and Metallicities from Near-Infrared Spectroscopy
• Evolution of the H$\beta$+[OIII] and [OII] luminosity functions and the [OII] star-formation history of the Universe up to $z$ ~ 5 from HiZELS
• A Hard Ionizing Spectrum in z=3-4 Ly-alpha Emitters with Intense [OIII] Emission: Analogs of Galaxies in the Reionization Era?
• The Rest-Frame Optical Spectroscopic Properties of Ly$\alpha$-Emitters at $z\sim 2.5$: The Physical Origins of Strong Ly$\alpha$ Emission
• An early phase of environmental effects on galaxy properties unveiled by near-infrared spectroscopy of protocluster galaxies at z>2
• [OIII] emission line as a tracer of star-forming galaxies at high redshifts: Comparison between H$\alpha$ and [OIII] emitters at $z$=2.23 in HiZELS
• Constraint on the inflow/outflow rates in star-forming galaxies at z~1.4 from molecular gas observations

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