Measurements of the global 21-cm signal from the Cosmic Dawn

Abstract

The sky-averaged (global) 21-cm signal is a very promising probe of the Cosmic Dawn, when the first luminous sources were formed and started to shine in a substantially neutral intergalactic medium. I here report on the status and early result of the Large-Aperture Experiment to Detect the Dark Age that focuses on observations of the global 21-cm signal in the $16\lesssim z\lesssim 30$ range.

Contributed talk to the IAU Symposium 333 "Peering towards Cosmic Dawn", Dubrovnik, October 2-6, 2017; to appear in the proceedings, eds. Vibor Jelic and Thijs van der Hulst [4 pages, 2 figures]

References in corpus (8)

• The Evolution of the Intergalactic Medium
• The Global 21 Centimeter Background from High Redshifts
• 21 cm fluctuations from inhomogeneous X-ray heating before reionization
• Design and characterization of the Large-Aperture Experiment to Detect the Dark Age (LEDA) radiometer systems
• Bayesian constraints on the global 21-cm signal from the Cosmic Dawn
• Foreground Model and Antenna Calibration Errors in the Measurement of the Sky-Averaged λ21 cm Signal at z~20
• Calibration of the EDGES High-Band Receiver to Observe the Global 21-cm Signature from the Epoch of Reionization
• Improved Measurement of the Spectral Index of the Diffuse Radio Background Between 90 and 190 MHz

Cited by in corpus (5)

• Formulating and critically examining the assumptions of global 21-cm signal analyses: How to avoid the false troughs that can appear in single spectrum fits
• PRATUSH experiment concept and design overview
• Physics Beyond The Standard Model with Circular Polarization in the CMB and CMB-21cm Cross-Correlation
• Synthetic Observations with the Square Kilometre Array (SKA) -- development towards an end-to-end pipeline
• Exploring delaying and heating effects on the 21-cm signature of fuzzy dark matter