A team of astronomers from Yale University and University of California at Santa Cruz discovered a galaxy dating from 670 million years after the Big Bang. Galaxies are a clue to the condition of the universe while still a baby while being named the oldest and farthest galaxy from Earth. "This is truly a galaxy from the infancy of the universe," said Garth Illingworth, an astronomer from UC Santa Cruz involved in the research. EGS-Zs8-1 was originally discovered by astronomers by looking at data collected by the Hubble and Spitzer spacecraft. However, astronomers assume that the EGS-zs8-1 is too bright to originate from the region indicated by Hubble. To determine the distance, astronomers observed with the MOSFIRE Infrared Spectograph instrument at the Keck l Telescope in Hawaii Determination of distance is based on changes in light from these galaxies, from high-energy light such as ultraviolet to optical and infrared light The universe continues to expand. Light from the past travels farther away. In its journey, the light experienced a change in wavelength.
The analysis published in the journal Astrophysical Journal Letters later confirmed that the EGS-zs8-1 dates back to 670 million years after the Big Bang. The light detected from EGS-zs8-1 is very dim. However, the original EGS-zs8-1 is a very active galaxy and the light of the galaxy produces stars 80 times faster than the Milky Way, productive and fertile. Stars with a total mass of 8 billion times the Sun have been produced, 15 percent greater than the mass of the Milky Way. "If it is a galaxy near the Milky Way now, it will be blue because it forms many stars, said Llingworth quoted by the LA Times, Tuesday (05/05/2015) Observations show that EGS-zs8-1 exists when the universe undergoes an important process when hydrogen between galaxies changes from a neutral phase to ionizing It seems that the young stars formed by galaxies such as EGS-zs8-1 are driving "The main transition is called reionization," said Rychard Bouwens of Leiden Observatory. From observations, astronomers could conclude that when babies, the universe is rich in large galaxies. However, these galaxies differ in characteristics from those of today.
By further observing galaxies the same age as the EGS-zs8-1, astronomers will be able to describe the development of the reionation of the universe. The effort will be supported by the James Webb Telescope which will be launched by the United States Aeronautics and Space Administration (NASA) in 2018
0 comments