The Fermi Bubbles as Starburst Wind Termination Shocks

Understand

The enhanced star formation in the inner 100 pc of the Galaxy launches a superwind at ~1600 km s$^{-1}$ for M82-like parameters.

• The ram pressure of the wind is very low compared to more powerful starburst winds.
• I show that halo gas stops the wind a few kpc from the Galactic Centre.
• I suggest that the termination shock accelerates cosmic rays, and that the resulting Inverse Compton gamma rays are visible as the Fermi Bubbles.