Wednesday, March 02, 2011

The Gamma Ray bubbles of the Milky Way

NASA's Fermi Telescope Finds Giant Structure in our Galaxy

Here's the preprint announcing the discovery: Giant Gamma-ray Bubbles from Fermi-LAT: AGN Activity or Bipolar Galactic Wind?.

These bubbles are gigantic and may have been created by an episode of Galactic center activity 1-2 Mya Fermi Bubbles: Evidence for a Possible Recent AGN Jet Activity in the Galaxy.

On the other hand maybe they are really, really old! The Fermi Bubbles: Giant, Multi-Billion-Year-Old Reservoirs of Galactic Center Cosmic Rays

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