New mysterious X-ray signals discovered by astronomers

Chandra-X-rayUsing Chandra X-ray Observatory by NASA and the XMM-Newton by ESA, a mysterious x-ray signal has been observed in a study of galaxy clusters. One exciting possibility may be that these X-rays might be the result of the decay of sterile neutrinos – a particle that is a very good candidate for dark matter, but it doesn’t certainly imply that all dark matter is composed of these particles. Continue reading