Multi wavelength composite astronomical image using data from the Jansky Very Large Array, Chandra X-ray Observatory, and optical data from the VLT and Subaru Telescopes.

In a latest find, researchers have captured a giant collision of several galaxy clusters, each consisting of hundreds of galaxies that has given rise to a spectacular aurora of fireworks. The intense collision generated shock waves and energy that resulted in the celestial fireworks display of bright radio emissions which were red and orange. The purple color at the center of the image indicated the X-rays resulting from extreme heating. The region of the galaxy-cluster collision is named as Abell 2744 and is situated around 4 billion light-years away from Earth.

The radio emission part of the image has been taken by from the new observations made with the National Science Foundation’s Karl G. Jansky Very Large Array (VLA), and then it was combined with the data previously collected from NASA’s Chandra X-ray Observatory. Both the data were then overlaid on an image at visible-light wavelengths made with the data taken from the Very Large Telescope (VLT) and the Subaru telescope. The main focus was on the new VLA observations.

The VLA observations revealed some new regions that were not detected earlier. In those regions, the shocks accelerated the subatomic particles resulting in bright radio emissions. A group of astronomers from the Harvard-Smithsonian Center for Astrophysics and the University of Southampton in the UK are analyzing the combined image of the collision in order get some crucial information about the sequence followed by the galaxy-cluster collisions.

According to the latest information, the scientists said that the evidence indicated a North-South collision of subclusters and an east-west(left-right in the image) collision. Also, scientists have indicated the possibility of a third collision. The astronomers are trying their best to gather as much data as possible from the observations made by the VLA and other telescopes. They want to know how these complex collisions occur, what is their pattern and also their aftermath. The latest findings were published in the Astrophysical Journal.


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