A large, deep 3 deg${}^2$ survey of H$\alpha$, [OIII], and [OII] emitters from LAGER: constraining luminosity functions

Abstract

We present our measurements of the H$\alpha$, [OIII], and [OII] luminosity functions as part of the Lyman Alpha Galaxies at Epoch of Reionization (LAGER) survey using our samples of 1577 $z=0.47$ H$\alpha$-, 3933 $z=0.93$ [OIII]-, and 5367 $z=1.59$ [OII]-selected emission line galaxies in a single 3 deg${}^2$ CTIO/Blanco DECam pointing of the COSMOS field. Our observations reach 5$\sigma$ depths of $8.2\times 10^{-18}$ erg s${}^{-1}$ cm${}^{-2}$ and comoving volumes of $(1-7)\times 10^5$ Mpc${}^3$ making our survey one of the deepest narrowband surveys. We measure the observed luminosity functions and find best-fits of ${\varphi }^{\star }=10^{-3.16\pm 0.09}$ Mpc${}^{-3}$ and $L^{\star }=10^{41.72\pm 0.09}$ erg s${}^{-1}$ for H$\alpha$, ${\varphi }^{\star }=10^{-2.16_{-0.12}^{+0.10}}$ Mpc${}^{-3}$ and $L^{\star }=10^{41.38_{-0.06}^{+0.07}}$ erg s${}^{-1}$ for [OIII], and ${\varphi }^{\star }=10^{-1.97_{-0.07}^{+0.07}}$ Mpc${}^{-3}$ and $L^{\star }=10^{41.66\pm 0.03}$ erg s${}^{-1}$ for [OII], with $\alpha$ fixed to $-1.75$, $-1.6$, and $-1.3$, respectively. An excess of bright $>10^{42}$ erg s${}^{-1}$ [OIII] emitters is observed and may be due to AGN contamination. Dust corrections are applied assuming $A_{\mathrm{H}\alpha }=1$ mag. We also design our own empirical rest-frame $g-r$ calibration using SDSS DR12 data, test it against our $z=0.47$ H$\alpha$ emitters with $z$COSMOS $1$D spectra, and calibrate it for $(g-r)$ between $-0.8$ and $1.3$ mag. Dust and AGN-corrected star formation rate densities (SFRDs) are measured as ${\log }_{10}{\rho }_{\mathrm{SFR}}/({\mathrm{M}}_{\odot }{\mathrm{yr}}^{-1}{\mathrm{Mpc}}^{-3})=-1.63\pm 0.04$, $-1.07\pm 0.06$, and $-0.90\pm 0.10$ for H$\alpha$, [OIII], and [OII], respectively. We find our [OIII] and [OII] samples fully trace cosmic star formation activity at their respective redshifts in comparison to multi-wavelength SFRDs, while the H$\alpha$ sample traces $\sim 70$ percent of the total $z=0.47$ SFRD.

21 pages, 12 figures, 6 Tables. Accepted by MNRAS for publication on 6 Jan 2020

References in corpus (27)

• Cosmic Star Formation History
• UV Luminosity Functions at redshifts z~4 to z~10: 10000 Galaxies from HST Legacy Fields
• UltraVISTA: a new ultra-deep near-infrared survey in COSMOS
• Strong Nebular Line Ratios in the Spectra of z~2-3 Star-forming Galaxies: First Results from KBSS-MOSFIRE
• The Chandra COSMOS Survey, I: Overview and Point Source Catalog
• The MOSFIRE Deep Evolution Field (MOSDEF) Survey: Rest-Frame Optical Spectroscopy for ~1500 H-Selected Galaxies at 1.37 < z < 3.8
• The Cosmic Evolution Survey (COSMOS): Subaru Observations of the HST COSMOS Field
• The XMM-Newton wide-field survey in the COSMOS field: I. Survey description
• The Luminosity Function and Star Formation Rate between Redshifts of 0.07 and 1.47 for Narrow-band Emitters in the Subaru Deep Field
• HiZELS: a high redshift survey of H-alpha emitters. I: the cosmic star-formation rate and clustering at z=2.23
• Large Structures and Galaxy Evolution in COSMOS at z < 1.1
• The XMM-Newton wide-field survey in the COSMOS field II: X-ray data and the logN-logS
• The H-alpha Luminosity Function and Star Formation Rate Volume Density at z=0.8 from the NEWFIRM H-alpha Survey
• 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
• Cosmic Web of Galaxies in the COSMOS Field: Public Catalog and Different Quenching for Centrals and Satellites
• The Halpha-based Star Formation Rate Density of the Universe at z=0.84
• The MOSDEF survey: AGN multi-wavelength identification, selection biases and host galaxy properties
• The COSMOS [OII] Survey: Evolution of Electron Density with Star Formation Rate
• The 0.1<z<1.65 evolution of the bright end of the [OII] luminosity function
• The H$\alpha$ Luminosity Function and Star Formation Rate at $z\approx 0.24$ in the Cosmos 2 Square-Degree Field
• Quasars in the COSMOS Field
• The [OII]3727 Luminosity function and Star Formation Rate at z~1.2 in the COSMOS 2 Square-degree Field and the Subaru Deep Field
• The GEEC2 spectroscopic survey of Galaxy Groups at $0.8<z<1$
• Predicting Hα emission line galaxy counts for future galaxy redshift surveys
• First Spectroscopic Confirmations of z ~ 7.0 Lya Emitting Galaxies in the LAGER Survey
• A Faint Flux-Limited Lyman Alpha Emitter Sample at $z\sim 0.3$
• Design for the First Narrowband Filter for the Dark Energy Camera: Optimizing the LAGER Survey for z ~ 7 Galaxies

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• The Physical Properties of Star-Forming Galaxies with Strong [O III] Lines at z=3.25
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