Gamma-ray search sets new limits on dark matter annihilation in the inner Milky Way

Astrophysicists have set new upper limits on the dark matter annihilation cross-section using gamma-ray observations of the inner Milky Way. The nature of dark matter particles remains undetermined, though its gravitational effects are well established.

• New constraints come from gamma-ray observations of the inner Galaxy
• Dark matter does not emit or absorb light and interacts weakly with ordinary matter
• Gravitational effects of dark matter are observed, but its composition is unknown