Calibrating photometric redshifts with intensity mapping observations
arXiv:1704.01941 · doi:10.1103/PhysRevD.96.043515
Abstract
Imaging surveys of galaxies will have a high number density and angular resolution yet a poor redshift precision. Intensity maps of neutral hydrogen (HI) will have accurate redshift resolution yet will not resolve individual sources. Using this complementarity, we show how the clustering redshifts approach, proposed for spectroscopic surveys can also be used in combination with intensity mapping observations to calibrate the redshift distribution of galaxies in an imaging survey and, as a result, reduce uncertainties in photometric redshift measurements. We show how the intensity mapping surveys to be carried out with the MeerKAT, HIRAX and SKA instruments can improve photometric redshift uncertainties to well below the requirements of DES and LSST. The effectiveness of this method as a function of instrumental parameters, foreground subtraction and other potential systematic errors is discussed in detail.
19 pages, 13 figures
References in corpus (14)
- K-corrections and filter transformations in the ultraviolet, optical, and near infrared
- Baryon Acoustic Oscillation Intensity Mapping as a Test of Dark Energy
- Measurement of 21 cm brightness fluctuations at z ~ 0.8 in cross-correlation
- Late-time cosmology with 21cm intensity mapping experiments
- Calibrating Redshift Distributions Beyond Spectroscopic Limits with Cross-Correlations
- The Epoch of Reionization Window: II. Statistical Methods for Foreground Wedge Reduction
- Possibility of Precise Measurement of the Cosmological Power Spectrum With a Dedicated 21cm Survey After Reionization
- Blind foreground subtraction for intensity mapping experiments
- Reconstructing Redshift Distributions with Cross-Correlations: Tests and an Optimized Recipe
- Photometric redshifts: estimating their contamination and distribution using clustering information
- 2dFLenS and KiDS: Determining source redshift distributions with cross-correlations
- Clustering-based redshift estimation: application to VIPERS/CFHTLS
- Probing the primordial Universe with MeerKAT and DES
- Complementing the ground-based CMB Stage-4 experiment on large scales with the PIXIE satellite
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- Reconstructing large-scale structure with neutral hydrogen surveys
- Intensity Mapping as a Probe of Axion Dark Matter
- Impact of Foregrounds on HI Intensity Mapping Cross-Correlations with Optical Surveys
- Lensing reconstruction from line intensity maps: the impact of gravitational nonlinearity
- Cosmology Intertwined: A Review of the Particle Physics, Astrophysics, and Cosmology Associated with the Cosmological Tensions and Anomalies
- Intensity mapping with neutral hydrogen and the Hidden Valley simulations
- Gravitational waves HI intensity mapping: cosmological and astrophysical applications
- Cross-correlating radio continuum surveys and CMB lensing: constraining redshift distributions, galaxy bias and cosmology
- Detecting the relativistic bispectrum in 21cm intensity maps
- Measuring the growth of structure with intensity mapping surveys
- Recovering lost 21 cm radial modes via cosmic tidal reconstruction
- Multipole expansion for HI intensity mapping experiments: simulations and modelling
- Detecting the power spectrum turnover with HI intensity mapping
- Constraining primordial non-Gaussianity by combining next-generation galaxy and 21 cm intensity mapping surveys
- Synergies between radio, optical and microwave observations at high redshift
- Constraining gravity at large scales with the 2MASS Photometric Redshift catalogue and Planck lensing
- HI Intensity Mapping for Clustering-Based Redshift Estimation
- Bayesian photometric redshifts of blended sources
- Full-sky bispectrum in redshift space for 21cm intensity maps
- Matched filtering with interferometric 21cm experiments
- The HI-halo mass relation at redshift from the Minkowski functionals of 21 cm intensity maps
- Testing gravity with gravitational waves electromagnetic probes cross-correlations
- A multi-tracer empirically-driven approach to line-intensity mapping lightcones
- Extracting the Signal of Cosmic String Wakes from 21-cm Observations
- Constraining the neutrino mass using a multi-tracer combination of two galaxy surveys and CMB lensing
- Sensitivity of Bayesian 21 cm power spectrum estimation to foreground model errors
- A wide-angle formulation of foreground filters for HI intensity mapping
- Constraining primordial non-Gaussianity by combining photometric galaxy and 21cm intensity mapping surveys
- Multi-tracing the primordial Universe with future surveys
- The Hydrogen Intensity and Real-time Analysis eXperiment: 256-Element Array Status and Overview
- Clustering redshifts with the 21cm-galaxy cross-bispectrum
- Constraining the growth rate on linear scales by combining SKAO and DESI surveys