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In the Beginning: The First Sources of Light and the Reionization of the Universe
Abstract The formation of the first stars and quasars marks the transformation of the universe from its smooth initial state to its clumpy current state. In popular cosmological models, the firstExpand
Fuzzy cold dark matter: the wave properties of ultralight particles.
TLDR
These problems might be solved, and the virtues of CDM models retained, even without postulating ad hoc dark matter particle or field interactions, if the dark matter is composed of ultralight scalar particles initially in a (cold) Bose-Einstein condensate, similar to axion dark matter models. Expand
A Method for Separating the Physics from the Astrophysics of High-Redshift 21 Centimeter Fluctuations
Fluctuations in the 21 cm brightness from cosmic hydrogen at redshifts z 6 have their source in the primordial density perturbations from inflation, as well as the radiation from galaxies. We proposeExpand
UNUSUALLY LARGE FLUCTUATIONS IN THE STATISTICS OF GALAXY FORMATION AT HIGH REDSHIFT
We show that various milestones of high-redshift galaxy formation, such as the formation of the first stars or the complete reionization of the intergalactic medium, occurred at different times inExpand
Detecting the Earliest Galaxies through Two New Sources of 21 Centimeter Fluctuations
The first galaxies that formed at a redshift z ~ 20-30 emitted continuum photons with energies between the Lyα and Lyman limit wavelengths of hydrogen, to which the neutral universe was transparentExpand
Possible interaction between baryons and dark-matter particles revealed by the first stars
TLDR
The analysis indicates that the spatial fluctuations of the 21-centimetre signal at cosmic dawn could be an order of magnitude larger than previously expected and that the dark-matter particle is no heavier than several proton masses, well below the commonly predicted mass of weakly interacting massive particles. Expand
The observable signature of late heating of the Universe during cosmic reionization
TLDR
It is shown that the hard spectra of X-ray binaries make such heating ineffective, resulting in a delayed and spatially uniform heating that modifies the 21-centimetre signature of reionization. Expand
The Reionization of the Universe by the First Stars and Quasars
▪ Abstract The formation of the first stars and quasars marks the transformation of the universe from its smooth initial state to its clumpy current state. In popular cosmological models, the firstExpand
Cold and Fuzzy Dark Matter
There is an asymmetry between the mass of the electric charges, for example proton and electron, can understood by the asymmetrical Planck Distribution Law. This temperature dependent energyExpand
Constraints on Warm Dark Matter from Cosmological Reionization
We study the constraints that high-redshift structure formation in the universe places on warm dark matter (WDM) dominated cosmological models. We modify the extended Press-Schechter formalism toExpand
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