Neutral hydrogen absorption adds a frequency-dependent optical depth to the CMB at long radio wavelengths, providing a new probe of x_HI/T_s during the dark ages and reionization.
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Simulations using the STARFIRE-2 model indicate that the global redshifted 21-cm signal from the cosmic dawn is detectable from a low-Earth near-polar orbit with a thermal noise limited radiometer.
Semi-numerical simulations plus Fisher analysis show that REACH-like observations of the 21-cm global signal can place meaningful constraints on the mass and star-formation efficiency of Population III stars.
citing papers explorer
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The $\tau$ of Neutral Hydrogen: Increased CMB Optical Depth at Long Wavelengths
Neutral hydrogen absorption adds a frequency-dependent optical depth to the CMB at long radio wavelengths, providing a new probe of x_HI/T_s during the dark ages and reionization.
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STARFIRE-2: Can we detect the global redshifted 21-cm signal from the cosmic dawn in Earth orbit?
Simulations using the STARFIRE-2 model indicate that the global redshifted 21-cm signal from the cosmic dawn is detectable from a low-Earth near-polar orbit with a thermal noise limited radiometer.
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Inferring population III star properties from the 21-cm global signal
Semi-numerical simulations plus Fisher analysis show that REACH-like observations of the 21-cm global signal can place meaningful constraints on the mass and star-formation efficiency of Population III stars.