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Probing the Density in the Galactic Center Region: Wind-Blown Bubbles and High-Energy Proton Constraints

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      Abstract

      Recent observations of the Galactic center in high-energy gamma-rays (above 0.1TeV) have opened up new ways to study this region, from understanding the emission source of these high-energy photons to constraining the environment in which they are formed. We present a revised theoretical density model of the inner 5pc surrounding Sgr A* based on the fact that the underlying structure of this region is dominated by the winds from the Wolf-Rayet stars orbiting Sgr A*. An ideal probe and application of this density structure is this high energy gamma-ray emission. We assume a proton-scattering model for the production of these gamma-rays and then determine first whether such a model is consistent with the observations and second whether we can use these observations to further constrain the density distribution in the Galactic center.

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      Journal
      18 September 2006
      astro-ph/0609483
      10.1086/512079
      Custom metadata
      LA-UR-06-5857
      Astrophys.J.659:389-406,2007
      36 pages including 17 figures, submitted to ApJ, comments welcome
      astro-ph

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