Supernova explosions may have regulated the amount of photons available to reionize the Universe.
The dwarfs that reionzied the universe may have shut their star-forming engines off in the process.
What caused the universe to shift from neutral to ionized as it expanded and cooled? Today, we examine clues that indicate it could have been the result of rapid star formation from the earliest galaxies.
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.
How did the universe go from being neutral and opaque to transparent and reionized at z ~ 6? Today’s paper gives us some observational evidence for what might be responsible.