Robert Lea is a science journalist in the U.K. whose articles have been published in Physics World, New Scientist, Astronomy Magazine, All About Space, Newsweek and ZME Science. He also writes about science communication for Elsevier and the European Journal of Physics. Rob holds a bachelor of science degree in physics and astronomy from the U.K.
"El Gordo" is one of the most cluster of galaxies known to exist. It has strange properties that could be explained if dark matter is self-interacting.Strange behavior in a massive cluster of merging galaxies could be explained if dark matter, the universe's most mysterious stuff, can collide with itself.
"However, there are still a number of observations which have not yet been explained using the standard model." "This is why, after the collision, the peak of gas mass density will lag behind those of dark matter and galaxies," explained Valdarnini. One odd feature of these emissions is the varying peak locations of different mass components. Unlike what is seen in another massive supercluster of colliding galaxies, called the in El Gordo is trailing the X-ray peak, and it also appears to be offset from SE's mass centroid. There are also strange features in the NW cluster of El Gordo. In this area, the peak density of galaxies is spatially offset from the corresponding mass peak.
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