HI Epoch of Reionization Arrays

Abstract

There are few data available with which to constrain the thermal history of the intergalactic medium (IGM) following global recombination. Thus far, most constraints flow from analyses of the Cosmic Microwave Background and optical spectroscopy along a few lines of sight. However, direct study of the IGM in emission or absorption against the CMB via the 1S hyperfine transition of Hydrogen would enable broad characterization thermal history and source populations. New generations of radio arrays are in development to measure this line signature. Bright foreground emission and the complexity of instrument calibration models are significant hurdles. How to optimize these is uncertain, resulting in a diversity in approaches. We discuss recent limits on line brightness, array efforts including the new Large Aperture Experiment to Detect the Dark Ages (LEDA), and the next generation Hydrogen Reionization Array (HERA) concept.

8 pages, 4 figures, 1 table. Invited review to the 11th Asian-Pacific Regional IAU Meeting 2011, NARIT Conference Series, Vol. 1 eds. S. Komonjinda, Y. Kovalev, and D. Ruffolo (2012)

References in corpus (3)

• Cosmic microwave background constraints on the duration and timing of reionization from the South Pole Telescope
• Accelerating Radio Astronomy Cross-Correlation with Graphics Processing Units
• Astrophysics from the Highly-Redshifted 21 cm Line

Cited by in corpus (32)

• PAPER-64 Constraints on Reionization: The 21cm Power Spectrum at z=8.4
• Enhanced global signal of neutral hydrogen due to excess radiation at cosmic dawn
• Neutrino Mass Ordering from Oscillations and Beyond: 2018 Status and Future Prospects
• Design and characterization of the Large-Aperture Experiment to Detect the Dark Age (LEDA) radiometer systems
• The Radio Background Below 100 MHz
• First Limits on the 21 cm Power Spectrum during the Epoch of X-ray heating
• The LWA1 Low Frequency Sky Survey
• Calibration of the EDGES High-Band Receiver to Observe the Global 21-cm Signature from the Epoch of Reionization
• Interpreting LOFAR 21-cm signal upper limits at z~9.1 in the context of high-z galaxy and reionisation observations
• Chromatic effects in the 21 cm global signal from the cosmic dawn
• The nature of dark matter from the global high redshift HI 21 cm signal
• Exploring reionisation and high-z galaxy observables with recent multi-redshift MWA upper limits on the 21-cm signal
• Constraining cosmology and ionization history with combined 21 cm power spectrum and global signal measurements
• Constraining High Redshift X-ray Sources with Next Generation 21 cm Power Spectrum Measurements
• maxsmooth: Rapid Maximally Smooth Function Fitting With Applications in Global 21-cm Cosmology
• Low Frequency Observations of the Moon with the Murchison Widefield Array
• Parametrizations of the global 21-cm signal and parameter estimation from single-dipole experiments
• Impact of Ly$\alpha$ heating on the global 21-cm signal from the Cosmic Dawn
• Foreground modelling via Gaussian process regression: an application to HERA data
• The All-Sky SignAl Short-Spacing INterferometer (ASSASSIN) I: Global sky measurements with the Engineering Development Array-2
• Statistical analysis of the causes of excess variance in the 21 cm signal power spectra obtained with the Low-Frequency Array
• Reionisation & Cosmic Dawn Astrophysics from the Square Kilometre Array: Impact of Observing Strategies
• The Engineering Development Array: A low frequency radio telescope utilising SKA precursor technology
• Precise Measurement of the Reionization Optical Depth from The Global 21-cm Signal Accounting for Cosmic Heating
• Using Artificial Neural Networks to extract the 21-cm Global Signal from the EDGES data
• 21cm Global Signal Extraction: Extracting the 21cm Global Signal using Artificial Neural Networks
• Astrophysical information from the Rayleigh-Jeans Tail of the CMB
• Measurements of the global 21-cm signal from the Cosmic Dawn
• Large HI optical depth and Redshifted 21-cm signal from cosmic dawn
• Enabling Discoveries: Thirty Years of Advanced Technologies and Instrumentation at the National Science Foundation
• It's Always Darkest Before the Cosmic Dawn: Early Results from Novel Tools and Telescopes for 21 cm Cosmology
• Direction-Dependent Polarised Primary Beams in Wide-Field Synthesis Imaging