Where did the first ray of light come in the universe? The Hubble discovery reveals clues about the conditions during the period when the universe was very young. A compact galaxy some 3 billion light years away is shedding new light on how stars were formed at the beginning of the universe. An intensely dense star forming galaxy is reproducing the events which brought light to the early universe.
The Dense and compact Galaxy has been christened J0921+4509 and is rapidly churning out stars. It has many of the uniqueness that would have been required to light up the early universe. The galaxy is located approximately 3 billion light years from the Milky Way. The tightly bound Galaxy is surrounded by dense clouds of gas. The clouds of gas has holes which allow radiations to streak out and the scenario is much akin to the events that would have broken through the darkness which followed the birth of the universe.
The dense compact Galaxy J0921+4509 creates roughly 50 solar-masses’ worth of stars every year. This is huge and more than 33 times the number of stars created by the Milky Way every year.
Most stars in other locations remains clothed in the gas which forms them and traps the radiation in them. On the other hand J0921 has holes that allow the radiation to escape, much as it might have in the early universe.
Lead author of the study Sanchayeeta Borthakur, of Johns Hopkins University, told Space.com by email “The high density of stars in a compact region in J0921+4509 results in an explosion-like feedback that is able to create the gaps.”
In the period after the Big Bang, Hydrogen in the universe cooled and any radiation was quickly absorbed making the period almost unobservable. However after a billion years after the big bang, radiations re-ionized the Hydrogen scattering electrons and made the universe visible again. To learn about the unobservable periods of the existence of the Universe, astronomers search for similar processes in objects they can examine today, in this case the starburst galaxy J0921.