Closing In on the Epoch of Reionization
An array of dipole antennas in South Africa’s Karoo desert offers the best limit on the power spectrum of the Epoch of Reionization.
Shedding Light on the Epoch of Reionization with Ion2
Ion2 is a compact, intensely star-forming galaxy. With its help we can shed light on one of the most significant transitions the Universe underwent – the very transition from being opaque to see-through.
Quasars, the Lyman Alpha Forest, and the Reionization of the Universe
While high-redshift quasars are very interesting objects in their own right, their incredible luminosities allow them to act as background light sources that illuminate the intervening universe on our line of sight. One could think of quasars as giant flashlights that the universe uses to make really interesting spectroscopic shadow puppets back here on Earth.
Using Reionization to constrain Primordial Magnetic Fields
The authors of this paper use modern constraints on reionization to estimate the strength of primordial magnetic fields at high redshift.
Cosmic Reionization of Hydrogen and Helium
Cosmic reionization is a period in the Universe history when it switched from being predominantly neutral to mostly ionized. We still haven’t quite pinned down the source(s) that caused this transition, but we have our suspicions. It could be quasars. It could be galaxies. Or could it be something else?
[Figure from universe-review.ca/F05-galaxy06.htm]