Reconstruction of HI power spectra with radio-interferometers to study dark energy

Abstract

Among the tools available for the study of the dark energy driving the expansion of the Universe, Baryon Acoustic Oscillations (BAO) and their effects on the matter power spectrum are particularly attractive. It was recently proposed to study these oscillations by mapping the 21cm emission of the neutral hydrogen in the redshift range $0.5<z<3$. We discuss here the precision of such measurements using radio-interferometers consisting of arrays of dishes or north-south oriented cylinders. We then discuss the resulting uncertainties on the BAO scales and the sensitivity to the parameters of the Dark Energy equation of state.

References in corpus (4)

• Five-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Data Processing, Sky Maps, and Basic Results
• Report of the Dark Energy Task Force
• How accurately can 21 cm tomography constrain cosmology?
• The Hubble Sphere Hydrogen Survey

Cited by in corpus (11)

• Observational Probes of Cosmic Acceleration
• The foreground wedge and 21 cm BAO surveys
• Forecast for FAST: from Galaxies Survey to Intensity Mapping
• Sky reconstruction from transit visibilities: PAON-4 and Tianlai Dish Array
• 21 cm Intensity Mapping
• BAORadio: A digital pipeline for radio interferometry and 21 cm mapping of large scale structures
• MANTIS: The Mid-Frequency Aperture Array Transient and Intensity-Mapping System
• SKA Aperture Array Mid Frequency Science Requirements
• Design, operation and performance of the PAON4 prototype transit interferometer
• EMBRACE@Nancay: An Ultra Wide Field of View Prototype for the SKA
• On sky characterization of the BAORadio wide band digital backend: Search for HI emission in Abell85, Abell1205 and Abell2440 galaxy clusters