• DOI:10.1088/2041-8205/731/1/L17
• Corpus ID: 119187800

ORIGIN OF THE FERMI BUBBLE

@article{Cheng2011ORIGINOT,
  title={ORIGIN OF THE FERMI BUBBLE},
  author={K. S. Cheng and D. O. Chernyshov and V. A. Dogiel and C. M. Ko and Wing-H. Ip},
  journal={The Astrophysical Journal Letters},
  year={2011},
  volume={731}
}

• K. Cheng, D. Chernyshov, +2 authors W. Ip
• Published 5 March 2011
• Physics
• The Astrophysical Journal Letters

Fermi has discovered two giant gamma-ray-emitting bubbles that extend nearly 10 kpc in diameter north and south of the Galactic center. The existence of the bubbles was first evidenced in X-rays detected by ROSAT and later WMAP detected an excess of radio signals at the location of the gamma-ray bubbles. We propose that periodic star capture processes by the galactic supermassive black hole, Sgr A*, with a capture rate 3 × 10−5 yr−1 and energy release ∼3 × 1052 erg per capture can produce very hot plasma ∼10 keV with a wind velocity ∼108 cm s−1 injected into the halo and heat up the halo gas to ∼1 keV, which produces thermal X-rays. The periodic injection of hot plasma can produce shocks in the halo and accelerate electrons to ∼TeV, which produce radio emission via synchrotron radiation and gamma rays via inverse Compton scattering with the relic and the galactic soft photons.