Astronomers found a “Milky Way-like” baby galaxy 12 billion light-years from Earth.
Astronomers are 12 billion light years from Earth. “Milky Way found a “baby galaxy like”
In their recent study, scientists said that billions of light-years from Earth, a surprisingly similar baby galaxy lurks to ours, it is calm and humble.
Scientists said the discovery changed their understanding of how galaxies form.
According to a study published in the journal Nature, the galaxy SPT0418-47 is located 12 billion light-years from Earth.
Max Planck Astrophysic Astronomers at the Institute (MPI) have detected the young galaxy using one of the world’s most powerful telescopes, the Atacama Large Millimeter / submillimeter Array (ALMA).
Even the most powerful telescopes have trouble capturing detailed observations of such distant galaxies. But using an effect called gravitational lensing, the team acted like a magnifying glass with the help of the gravitational force of a nearby galaxy, allowing ALMA to see “the distant past in unprecedented detail.”
Because the galaxy is so far away, astronomers see it as when the universe was 1.4 billion years old. They said SPT0418-47 was “surprisingly chaotic”. It contradicts common theories that all young galaxies are “turbulent and unstable” compared to more mature galaxies such as the Milky Way.
“What we found was pretty confusing,” said author Simona Vegetti: “SPT0418-47 is the best regular galaxy disk ever observed in the early Universe, despite its high rate of star formation and therefore the location of highly energetic processes.”
“A TREASURE CONSIDER”
“This result is quite unexpected and has important implications for how we think galaxies evolved,” MPI said in a recent press release.
“This result represents a breakthrough in the field of galaxy formation and shows that the structures we observed in nearby spiral galaxies and the Milky Way were already in place 12 billion years ago,” MPI said.
Using a new computer modeling technique, the researchers reconstructed the actual shape of the galaxy and the movement of its gas from ALMA data. “When I first saw the reconstructed image of SPT0418-47, I couldn’t believe it: a treasure chest opens,” Rizzo said.
SPT0418-47 does not appear to have spiral arms like the Milky Way. However, both SPT0418-47 and our galaxy have rotating discs and bulges (large groups of stars tightly lined up around their centers).
He said that scientists have detected a protrusion for the first time so early in the history of the universe – making SPT0418-47 “similar to the Milky Way” which is farther away.
“The big surprise was to find that this galaxy is actually quite similar to nearby galaxies, contrary to all expectations of models and previous, less detailed observations,” said co-author Filippo Fraternali of the University’s Kapteyn Institute of Astronomy in the Netherlands.
Studying a baby galaxy that allows astronomers to see the universe when it is only 10 percent of its current age is key to understanding how galaxies form and develop. It is unclear how a well-ordered galaxy could have formed so soon after the Big Bang, and it shows that the early universe may have been less chaotic than once believed.
Astronomers have several similarities, but expect SPT0418-47 to evolve from the Milky Way into a completely unique galaxy, and they predict that it will eventually join the class of elliptical galaxies.
In the future, astronomers hope to realize how common these baby disk galaxies are and how chaotic they are to further our understanding of the evolution of our own galaxy.
Source: Space Mag Turkey