Particle Propagation in the Galactic Center and Spatial Distribution of Non-Thermal X-rays

Abstract

We showed that if the non-thermal emission from the Galactic center in the range 14-40 keV is due to inverse bremsstrahlung emission of subrelativistic protons, their interactions with hot and cold fractions of the interstellar medium are equally important. Our estimation show that about 30% of the total non-thermal flux from the GC in the range 14-40 keV is generated in regions of cold gas while the rest is produced by proton interaction with hot plasma. From the spatial distribution of 6.7 keV iron line we concluded the spatial distribution of hot plasma is strongly non-uniform that should be taken into account in analysis of protons propagation in the GC. From the Suzaku data we got independent estimates for the diffusion coefficient of subrelativistic protons in the GC, which was in the range $10^{26}-10^{27}$ cm${}^2$s${}^{-1}$

To be published in PASJ, v.61, No.5, 2009

References in corpus (10)

• Hard X-ray Detector (HXD) on Board Suzaku
• In-Orbit Performance of the Hard X-ray Detector on board Suzaku
• Discrete sources as the origin of the Galactic X-ray ridge emission
• A Catalog of X-ray Point Sources from Two Megaseconds of Chandra Observations of the Galactic Center
• Iron and Nickel Line Diagnostics for the Galactic Center Diffuse Emission
• Annihilation Emission from the Galactic Black Hole
• Discoveries of Diffuse Iron Line Sources from the Sgr B Region
• Diffuse Gamma-ray Emission from the Galactic Center - A Multiple Energy Injection Model
• Suzaku Detection of Extended/Diffuse Hard X-Ray Emission from the Galactic Center
• Origin of Thermal and Non-Thermal Hard X-ray Emission from the Galactic Center

Cited by in corpus (6)

• Origin of the Fermi Bubble
• Hard X-ray Morphological and Spectral Studies of The Galactic Center Molecular Cloud Sgr B2: Constraining Past Sgr A* Flaring Activity
• A past capture event at Sagittarius A* inferred from the fluorescent X-ray emission of Sagittarius B clouds
• Nuclear Interaction Gamma-Ray Lines from the Galactic Center Region
• Sgr B2 hard X-ray emission with INTEGRAL after 2009: still detectable?
• Spatial and Temporal Variations of the Diffuse Iron 6.4 keV Line in the Galactic Center Region