The Remnants of the Collision of 2 Galactic Clusters Can Be Observed in the Southern Sky

The collision of 2 galaxy clusters produces a shock wave that is observed by radio waves.

REPUBLIKA.CO.ID, JAKARTA — One billion years ago, there was a truly terrifying collision of two galaxy clusters. The collision of these two galaxy clusters produced a pair of shockwaves of truly epic proportions.

Currently, the structure shines brightly in radio wavelengths. The size is very large so it can be easily swallowed galaksi bima sakti which is estimated to be 100,000 light-years in diameter, extending up to 6.5 million light-years through intergalactic space.

Now, using the MeerKAT radio telescope in South Africa, a team of astronomers has carried out the most detailed study of the structure of this radio. This study provides new insights into some of the most massive events in the Universe.

“This structure is full of surprises and much more complex than we previously thought,” said astronomer Francesco de Gasperin of the University of Hamburg in Germany and the National Institute for astrophysics in Italy. SciencealertThursday (24/2/2022).

“Shock waves act as giant particle accelerators that accelerate electrons to near the speed of light. When these fast electrons cross a magnetic field, they emit Radio Wave what we see,” he said.

The galaxy cluster, called Abell 3667, is still united. At least 550 galaxies have been associated with it. The shockwave spread through it at a speed of about 1,500 kilometers per second. Shocks associated with cluster mergers are known as radio relics, and can be used to investigate the properties of intergalactic space within the cluster, known as intracluster media and intracluster dynamics.

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Abell 3667, at a distance of about 700 million light years, is relatively close to us, and also quite large. That is, it is an excellent target for investigation.

Because the cluster is in the southern sky, astronomers can see it with one of the world’s most sensitive radio telescopes. MeerKAT is the precursor and pathfinder for the Square Kilometer Array (SKA) currently being developed across Australia and South Africa to provide an unprecedented radio eye in the sky.

“Our observations have revealed the complexity of the interactions between thermal and non-thermal components in the most active region of the merging cluster,” the researchers wrote in their study.

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