- #1
- 11,439
- 750
The 3.5 Kev x ray emission line first reported by Bulbul and Boyarsky in early 2014 continues to surface in the literature. This paper;http://arxiv.org/abs/1512.07217, Searching for decaying dark matter in deep XMM-Newton observation of the Draco dwarf spheroidal, conflicts with the findings of Jeltema and Profumo earlier this month claiming no evidence for any such line [re: http://arxiv.org/abs/1512.01239, Deep XMM Observations of Draco rule out a dark matter decay origin for the 3.5 keV line]. Not unlike previous challenges of the 3.5 Kev line as evidence for dark matter decay, this one too appears weak in the face of closer scrutiny. Now, two years following discovery of the 3.5 Kev emission line, it remains a mystery.