Theory Group : Cosmology : Cosmic Reionization
The earliest generations of stars are thought to have transformed
the universe from darkness to light and to have reionized
and heated the intergalactic medium (Barkana & Loeb
2001). Knowing how the reionization process happened is
a primary goal of cosmologists, because this would tell us
when the early stars formed and in what kinds of galaxies.
The clustering of these galaxies is particularly interesting
since it is driven by large-scale density fluctuations in the
dark matter (Barkana & Loeb 2004). While the distribution
of neutral hydrogen during reionization can in principle be
measured from maps of 21-cm emission by neutral hydrogen,
upcoming experiments are expected to be able to detect
ionization fluctuations only statistically (for reviews see,
e.g., Furlanetto et al. 2006; Barkana & Loeb 2007)...
Measuring the History of Cosmic Reionization using the
21-cm PDF from Simulations
Theoretical astrophysics: cosmology, galaxy formation, the interstellar medium, the intergalactic medium, interstellar dust grains, astrophysical hydrodynamics.
Structure Formation, Milky Way Evolution, ISM and Star Formation, Early Universe, First Stars & Galaxies, Clusters of Galaxies
(top) Slice of the Cosmic Web of Dark Matter at redshift z = 6 from our
CubeP3M Code simulation with 30723 particles (29 billion)
on a 61443 fine grid in
a comoving volume of 163 Mpc on a side. (bottom) zoom-in of 10 Mpc × 10 Mpc subregion. Slices are 20 Mpc thick.
Simulating Cosmic Reionization