A mysterious gamma-ray stream comes from the Milky Way's center. Could dark matter have something to do wit...

Key Points:

• New research using machine learning on simulated gamma-ray data has failed to rule out self-annihilating dark matter as the source of the Galactic Center Excess, a mysterious gamma-ray glow from the Milky Way's core.
• The Galactic Center Excess has been debated for over a decade, with possible explanations including pulsars and dark matter particles that annihilate themselves to emit gamma rays.
• Findings indicate that if pulsars are responsible, their population would need to exceed 35,000, far higher than previous estimates, making their emissions nearly indistinguishable from those expected from dark matter annihilation.
• The study highlights the difficulty of interpreting gamma-ray signals from the densely crowded and bright Galactic Center region, leaving dark matter as a plausible but unconfirmed explanation.
• Researchers emphasize that while their work keeps dark matter in consideration, it does not provide definitive proof, and the origin of the Galactic Center Excess remains an open question in astrophysics.