FMOS near-IR spectroscopy of Herschel selected galaxies: star formation rates, metallicity and dust attenuation at z~1

Abstract

We investigate the properties (e.g. star formation rate, dust attentuation, stellar mass and metallicity) of a sample of infrared luminous galaxies at z \sim 1 via near-IR spectroscopy with Subaru-FMOS. Our sample consists of Herschel SPIRE and Spitzer MIPS selected sources in the COSMOS field with photometric redshifts in the range 0.7 < z-phot < 1.8, which have been targeted in 2 pointings (0.5 sq. deg.) with FMOS. We find a modest success rate for emission line detections, with candidate Hα emission lines detected for 57 of 168 SPIRE sources (34 per cent). By stacking the near-IR spectra we directly measure the mean Balmer decrement for the Hα and Hβ lines, finding a value of <E(B-V)> = 0.51\pm0.27 for <LIR> = 10^12 Lsol sources at <z> = 1.36. By comparing star formation rates estimated from the IR and from the dust uncorrected Hα line we find a strong relationship between dust attenuation and star formation rate. This relation is broadly consistent with that previously seen in star-forming galaxies at z ~ 0.1. Finally, we investigate the metallicity via the N2 ratio, finding that z ~ 1 IR-selected sources are indistinguishable from the local mass-metallicity relation. We also find a strong correlation between dust attentuation and metallicity, with the most metal-rich IR-sources experiencing the largest levels of dust attenuation.

13 pages, 7 figures, MNRAS accepted

References in corpus (6)

• The Cosmic Evolution Survey (COSMOS) -- Overview
• COSMOS Photometric Redshifts with 30-bands for 2-deg2
• The Mass-Metallicity Relation at z~2
• zCOSMOS: A Large VLT/VIMOS redshift survey covering 0 < z < 3 in the COSMOS field
• Weak Gravitational Lensing with COSMOS: Galaxy Selection and Shape Measurements
• The Galaxy Mass Function up to z=4 in the GOODS-MUSIC sample: into the epoch of formation of massive galaxies

Cited by in corpus (34)

• The COSMOS2015 Catalog: Exploring the 1<z<6 Universe with half a million galaxies
• De Re Metallica: The cosmic chemical evolution of galaxies
• The FMOS-COSMOS survey of star-forming galaxies at z ~ 1.6. I. Hα-based star formation rates and dust extinction
• The FMOS-COSMOS survey of star-forming galaxies at z~1.6 III. Survey design, performance, and sample characteristics
• The Mass-Metallicity-SFR Relation at z >~ 2 with 3D-HST
• HELP: The Herschel Extragalactic Legacy Project
• A fundamental metallicity relation for galaxies at z = 0.84 - 1.47 from HiZELS
• Chandra centres for COSMOS X-ray galaxy groups: Differences in stellar properties between central dominant and offset brightest group galaxies
• Rest-UV Absorption Lines as Metallicity Estimator: the Metal Content of Star-Forming Galaxies at z~5
• Herschel reveals the obscured star formation in HiZELS Hα emitters at z=1.47
• Hidden Starbursts and Active Galactic Nuclei at 0<z<4 from the Herschel-VVDS-CFHTLS-D1 Field: Inferences on Coevolution and Feedback
• The SCUBA-2 Cosmology Legacy Survey: demographics of the 450 μm-population
• A comparative analysis of virial black-hole mass estimates of moderate-luminosity active galactic nuclei using Subaru/FMOS
• Illuminating the Darkest Gamma-Ray Bursts with Radio Observations
• Hard X-Ray to Radio Multiwavelength SED Analysis of Local U/LIRGs in GOALS Sample with Self-consistent AGN Model Including Polar-dust Component
• Physical conditions of the interstellar medium in star-forming galaxies at z~1.5
• Herschel observed Stripe 82 quasars and their host galaxies: connections between the AGN activity and the host galaxy star formation
• The star-formation history of mass-selected galaxies from the VIDEO survey
• (Sub)millimetre interferometric imaging of a sample of COSMOS/AzTEC submillimetre galaxies - II. The spatial extent of the radio-emitting regions
• Herschel Far-IR counterparts of SDSS galaxies: Analysis of commonly used Star Formation Rate estimates
• Gas Phase Metallicities of Local Ultra-Luminous Infrared Galaxies Follow Normal Star-Forming Galaxies
• The mass--metallicity relation AKARI-FMOS infrared galaxies at $z\sim 0.88$ in the AKARI North Ecliptic Pole Deep Survey Field
• MAGIC: Muse gAlaxy Groups In Cosmos -- A survey to probe the impact of environment on galaxy evolution over the last 8 Gyr
• Morphological Evolution of the Hosts of Far-Infrared/Submillimeter Galaxies
• Local Volume HI Survey: the far-infrared radio correlation
• A Spectroscopic Census of X-ray Systems in the COSMOS Field
• Cosmic star formation probed via parametric stack-fitting of known sources to radio imaging
• COSMOS Brightest Group Galaxies -- III: Evolution of stellar ages
• Environments of a sample of AzTEC submillimetre galaxies in the COSMOS field
• Constraint on the Gas-to-Dust Ratio in Massive Star-Forming Galaxies at z~1.4
• Gas-to-dust ratio in massive star-forming galaxies at z~1.4
• Dust Properties of Clumpy Disc Galaxies at z~1.3 with Herschel-SPIRE
• Using a Neural Network Classifier to Select Galaxies with the Most Accurate Photometric Redshifts
• The extension of the Fundamental Metallicity Relation beyond the BPT star-forming sequence: evidence for both gas accretion and starvation