High-redshift cosmology with oxygen lines from H$\alpha$ surveys

Abstract

A new generation of cosmological experiments will spectroscopically detect the H$\alpha$ line from ELGs at optical/near-infrared frequencies. Other emission lines will also be present, which may come from the same H$\alpha$ sample or constitute a new galaxy sample altogether. Our goal is to assess the value, for cosmological investigation, of galaxies at $z\gtrsim 2$ present in H$\alpha$ galaxy surveys and identifiable by the highly redshifted ultra-violet and optical lines - namely the OII line and the OIII doublet in combination with the H$\beta$ line. We use state-of-the-art luminosity functions to estimate the number density of OIIIb and OII ELGs. We study the constraining power of these high-redshift galaxy samples on cosmological parameters such as the BAO amplitude, $H(z)$, $D_{\mathrm{A}}(z)$, $f{\sigma }_8(z)$, and $b{\sigma }_8(z)$ for different survey designs. We present a strong science case for extracting the OIIIb sample, which we consider as an independent probe of the Universe in the redshift range $2-3$. Moreover, we show that the OII sample can be used to measure the BAO and growth of structure above $z=3$; albeit it may be shot-noise dominated, it will nonetheless provide valuable tomographic information. We discuss the scientific potential of a sample of galaxies which, so far, has been mainly considered as a contaminant in H$\alpha$ galaxy surveys. Our findings indicate that planned H$\alpha$ surveys should include the extraction of these oxygen-line samples in their pipeline, to enhance their scientific impact on cosmology.

arXiv commentVersion matching publication on MNRAS

References in corpus (30)

• Stable clustering, the halo model and nonlinear cosmological power spectra
• Spectroscopic Target Selection in the Sloan Digital Sky Survey: The Main Galaxy Sample
• The DESI Experiment Part I: Science,Targeting, and Survey Design
• SparsePak: A Formatted Fiber Field Unit for The WIYN Telescope Bench Spectrograph. I. Design, Construction, and Calibration
• Wide-Field InfrarRed Survey Telescope-Astrophysics Focused Telescope Assets WFIRST-AFTA 2015 Report
• Cosmology and fundamental physics with the Euclid satellite
• Extragalactic Science, Cosmology and Galactic Archaeology with the Subaru Prime Focus Spectrograph (PFS)
• Quasar-Lyman $\alpha$ Forest Cross-Correlation from BOSS DR11 : Baryon Acoustic Oscillations
• The Lyman-alpha Forest Power Spectrum from the Sloan Digital Sky Survey
• The clustering of the SDSS-IV extended Baryon Oscillation Spectroscopic Survey DR14 quasar sample: First measurement of Baryon Acoustic Oscillations between redshift 0.8 and 2.2
• A large Hα survey at z=2.23, 1.47, 0.84 & 0.40: the 11 Gyr evolution of star-forming galaxies from HiZELS
• Late-time cosmology with 21cm intensity mapping experiments
• The VIMOS Public Extragalactic Redshift Survey (VIPERS). Full spectroscopic data and auxiliary information release (PDR-2)
• Fast Estimators for Redshift-Space Clustering
• HiZELS: a high redshift survey of H-alpha emitters. I: the cosmic star-formation rate and clustering at z=2.23
• The SDSS-IV extended Baryon Oscillation Spectroscopic Survey: Baryon Acoustic Oscillations at redshift of 0.72 with the DR14 Luminous Red Galaxy Sample
• The large-scale cross-correlation of Damped Lyman Alpha Systems with the Lyman Alpha Forest: First Measurements from BOSS
• Measuring line-of-sight dependent Fourier-space clustering using FFTs
• Galaxy And Mass Assembly (GAMA): The input catalogue and star-galaxy separation
• 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
• Modelling the number density of Halpha emitters for future spectroscopic near-IR space missions
• Foreground contamination in Ly-alpha intensity mapping during the epoch of reionization
• Investigating Emission Line Galaxy Surveys with the Sloan Digital Sky Survey Telescope
• The evolution of the [OII], Hβ and [OIII] emission-line luminosity functions over the last nine billions years
• Interloper bias in future large-scale structure surveys
• Prediction of H$\alpha$ and [OIII] Emission Line Galaxy Number Counts for Future Galaxy Redshift Surveys
• J-PLUS: Synthetic galaxy catalogues with emission lines for photometric surveys
• The Impact of Line Misidentification on Cosmological Constraints from Euclid and other Spectroscopic Galaxy Surveys
• Unbiased Cosmological Parameter Estimation from Emission Line Surveys with Interlopers
• The DEEP2 Galaxy Redshift Survey: Redshift Identification of Single-Line Emission Galaxies

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