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Early Cosmological HII/HeIII Regions and Their Impact on Second-Generation Star Formation
Naoki Yoshida, S. Peng Oh, Tetsu Kitayama +1
(Abridged) We present the results of three-dimensional radiation-hydrodynamics simulations of the formation and evolution of early HII/HeIII regions around the first stars. Cooling…
Cosmology at Low Frequencies: The 21 cm Transition and the High-Redshift Universe
Steven Furlanetto, S. Peng Oh, Frank Briggs
Observations of the high-redshift Universe with the 21 cm hyperfine line of neutral hydrogen promise to open an entirely new window onto the early phases of cosmic structure format…
The Effects of Dark Matter Decay and Annihilation on the High-Redshift 21 cm Background
Steven Furlanetto, S. Peng Oh, Elena Pierpaoli
The radiation background produced by the 21 cm spin-flip transition of neutral hydrogen at high redshifts can be a pristine probe of fundamental physics and cosmology. At z~30-300,…
Redshifted 21 Centimeter Emission from Minihalos Before Reionization
Steven Furlanetto, S. Peng Oh
Before reionization, the intergalactic medium (IGM) may have been sufficiently cold for low-mass "minihalos" to condense out of the gas and subsequently affect reionization. Previo…