A $\sim 43$ GeV $\gamma$-ray line signature in the directions of a group
of nearby massive galaxy clusters
A $\sim 43$ GeV $\gamma$-ray line signature in the directions of a group
of nearby massive galaxy clusters
As the largest gravitationally bound objects in the Universe, galaxy clusters have provided the first piece of evidence for the presence of dark matter and may be suitable targets for indirect dark matter searches. Among various signals, the GeV-TeV $\gamma$-ray line has been taken as the smoking-gun signal of the …