NASA's James Webb Space Telescope (JWST) has learned that the early galaxy SPT0418-47 has a companion galaxy called SPT0418-SE.
Early Galaxy SPT0418-47 Has a Companion
JWST's initial target in their recent observation was SPT0418-47, one of the brightest and most dusty star-forming galaxies in the early universe. It is about 12 billion light-years away from Earth.
NASA has learned that its light is bent and was magnified by the gravity of its companion galaxy in the foreground, creating a near-perfect circle called the Einstein ring.
The scientists were able to get a clearer view of SPT0418-47 and noticed a curious blob of light shining near the galaxy's outer edge. They later learned the blog was its companion galaxy that was previously overshadowed by the light of the foreground galaxy, according to a statement from Cornell University.
Bo Peng, lead author of the study and a doctoral student in astronomy at Cornell, said the new galaxy they discovered, SPT0418-SE, was super-chemically abundant, and they never expected it. He added that JWST changed how they view the system and opened up new venues to study how stars and galaxies formed.
According to Space, earlier observations of SPT0418-47 had already hinted about a potential companion. At the time, it was interpreted as random noise.
With the help of JWST, astronomers discovered SPT0418-SE, which was only 16,000 light-years away from SPT0418-47. The two were near each other compared to Magellanic Clouds, two irregular dwarf galaxies - the Large Magellanic Cloud (LMC) and the Small Magellanic Cloud (SMC) - that are long-term companions of the Milky Way, which are 160,000 light years away from our galaxy.
The close proximity between the two galaxies suggests that galaxies interact and are bound to merge eventually. It could show how early galaxies evolved into larger ones, especially since SPT0418-47 is believed to have formed when the universe was only 1.4 billion years old.
3 Galaxy Clusters in Chaotic Merge
Galaxies likely interact because at least three galaxy clusters are spotted merging earlier this year. The massive collision was spotted 780 million light-years from Earth.
In a previous report from Science Times, each of the galactic clusters has hundreds of thousands of individual galaxies, and they formed an even larger galactic cluster called Abell 2256.
Kamlesh Rajpurohit, an astronomer at the University of Bologna in Italy, leads the study of Abell 2256. They want to uncover the origin of the huge galaxy clusters among the universe's largest formations.
According to them, galactic clusters are exciting to study because they are the largest known particle accelerators and are hypothesized to be the source of enigmatic cosmic rays.
Astronomers compiled several data to study the ongoing chaotic knot. NASA's Chandra X-ray Observatory, the European Space Agency's XMM-Newton, Pan-STARRS at Haleakala Observatory in Hawaii, the Giant Metrewave Radio Telescope in Pune, India, the Low-Frequency Array in the Netherlands and neighboring European countries; and the Very Large Array near Sonoma, California, all contributed to determining what's happening inside the colliding galactic clusters.
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