Reionization was an era of major transition that occurred more than 13 billion years ago. It was when the baby universe transformed from a neutral state to one filled with free electrons and protons.

Astronomers from the University of Arizona have uncovered astonishing details about a galaxy that existed when the universe ...

SPHEREx will look back at another era of the universe’s history, called the “epoch of reionization.” During this period, starting a few hundred million years after the Big Bang, ultraviolet light from ...

The epoch of reionization was the era during which the first population of stars in the Universe, seeded by the same over-densities visible in the CMB, ionized the neutral hydrogen then ubiquitous in ...

We discuss the 21cm power spectrum (PS) following the completion of reionization. In contrast to the reionization era, this PS is proportional to the PS of mass density fluctuations, with only a small ...

It may therefore be possible to directly observe ‘strong’ Lyα emission lines (EW ≳ 50Å rest frame) from the highest redshift galaxies that reside in the smallest H ii‘bubbles’ early in the ...

The SPHEREx mission will study galaxy evolution and space origins. Learn how it will revolutionise Astrophysics.

reflecting the amplitude of density fluctuations at the reionization era. The predicted CIB intensity lies on a level of possible detection by forthcoming IR space telescope facilities.

This radiation led to the “Era of Reionization,” where neutral hydrogen was split into plasma, free electrons, and protons. By one billion years after the Big Bang, this process led to the ...