X-ray annual modulation observed by XMM-Newton and Axion Quark Nugget Dark Matter

Understand

The XMM-Newton observatory shows evidence, with a 11$\sigma$ confidence level, for seasonal variation of the X-ray background in the near-Earth environment in the 2-6 keV energy range (Fraser et al.

• 2014).
• The authors argue that the observed seasonal variation suggests a possible link with dark matter.
• We propose an explanation which involves the Axion Quark Nugget (AQN) dark matter model.