Exploring Large-scale Structure with Billions of Galaxies

Abstract

We consider cosmological applications of galaxy number density correlations to be inferred from future deep and wide multi-band optical surveys. We mostly focus on very large scales as a probe of possible features in the primordial power spectrum. We find the proposed survey of the Large Synoptic Survey Telescope may be competitive with future all-sky CMB experiments over a broad range of scales. On very large scales the inferred power spectrum is robust to photometric redshift errors, and, given a sufficient number density of galaxies, to angular variations in dust extinction and photometric calibration errors. We also consider other applications, such as constraining dark energy with the two CMB-calibrated standard rulers in the matter power spectrum, and controlling the effect of photometric redshift errors to facilitate the interpretation of cosmic shear data. We find that deep photometric surveys over wide area can provide constraints that are competitive with spectroscopic surveys in small volumes.

11 pages, 7 figures, ApJ accepted, references added, expanded discussion in Sec. 3.2

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Cited by in corpus (22)

• Large-angle anomalies in the CMB
• Cosmological baryonic and matter densities from 600,000 SDSS Luminous Red Galaxies with photometric redshifts
• Baryon acoustic signature in the clustering of density maxima
• Halo-model signatures from 380,000 SDSS Luminous Red Galaxies with photometric redshifts
• Towards accurate cosmological predictions for rapidly oscillating scalar fields as dark matter
• Axion constraints in non-standard thermal histories
• Cosmology with the Large Synoptic Survey Telescope: an Overview
• A sub-horizon framework for probing the relationship between the cosmological matter distribution and metric perturbations
• Cosmic tomographies: baryon acoustic oscillations and weak lensing
• Baryon Oscillations and Consistency Tests for Photometrically-Determined Redshifts of Very Faint Galaxies
• Magnification-Temperature Correlation: the Dark Side of ISW Measurements
• Galaxy-CMB Cross-Correlation as a Probe of Alternative Models of Gravity
• Non-linear damping of superimposed primordial oscillations on the matter power spectrum in galaxy surveys
• Weighing the Universe with Photometric Redshift Surveys and the Impact on Dark Energy Forecasts
• Euclid: The search for primordial features
• Extracting Photometric Redshift from Galaxy Flux and Image Data using Neural Networks in the CSST Survey
• Small-scale primordial fluctuations in the 21cm Dark Ages signal
• Forecasting neutrino masses from galaxy clustering in the Dark Energy Survey combined with the Planck Measurements
• Probing primordial features with the primary CMB
• Probing the Primordial Power Spectrum with Cluster Number Counts
• Refining the nonlinear modelling of primordial oscillatory features
• Angular Diameter Distance Measurement with Galaxy Clustering in the Multipole Space