A new study published in Davis’ astrophysical journal astronomers reveal massive collisions between galaxies through a combination of X-rays and optical light data.
The recent composite image, taken using NASA’s Chandra X-ray Observatory and visible-light surveys, provides crystal-clear evidence that two galaxy clusters are currently colliding.
Astronomers further took advantage of Chandra’s X-ray capabilities to closely examine intensely hot gas within the structure.
It has been observed that the gas in such clusters usually acts as a halo, but in this case the gas is diluted, revealing that two subclusters are colliding with each other.
This gas contains a greater mass than all galaxies combined, along with a significant amount of non-luminous or dark matter.
Investigating the hidden secrets of dark matter
Researchers use computer models to study these clusters, which first collided more than 2 billion years ago and reached a point of maximum impact, or shock, about 400 million years ago.
Despite the specific timeline, this offers scientists a better understanding of how dark matter behaves during high-speed collisions.
The study will help uncover crucial insights about the mysterious substance that makes up most of the universe.
