Inverse Compton Scenarios for the TeV Gamma-Ray Emission of the Galactic Centre

Abstract

The intense Compton cooling of ultra-relativistic electrons in the Klein-Nishina regime in radiation dominated environments, such as that found in the Galactic Centre, may result in radically different electron spectra than those produced by Synchrotron cooling. We explore these effects and their impact on the X-ray and gamma-ray spectra produced in electron accelerators in this region in comparison to elsewhere in our galaxy. We discuss the broad-band emission expected from the newly discovered pulsar wind nebula G 359.95-0.04 and the possible relationship of this X-ray source to the central TeV gamma-ray source HESS J1745-290. Finally we discuss the possible relationship of the Galactic Centre INTEGRAL source IGR J1745.6-2901 to the TeV emission.

10 pages, 7 figures, to appear in ApJ 656

References in corpus (2)

• Inverse Compton Emission from Galactic Supernova Remnants: Effect of the Interstellar Radiation Field
• TeV gamma-rays and the largest masses and annihilation cross sections of neutralino dark matter

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• Spectral evolution of non-thermal electron distributions in intense radiation fields
• Fermi LAT observations of Sagittarius A*: Imaging Analysis
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• Discovery of an X-ray nebula around PSR J1718-3825 and implications for the nature of the gamma-ray source HESS J1718-385
• On the expected $\gamma$-ray emission from nearby flaring stars
• Particle acceleration in the expanding blast wave of Eta Carina's Great Eruption of 1843
• Modeling the gamma-ray emission in the Galactic Center with a fading cosmic-ray accelerator
• Cosmic rays cannot explain the high ionisation rates in the Galactic centre
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• A refined model of secondary photon emission from heavy WIMP annihilations in the Galactic Centre
• Search for long-term variability of HESS J1745-290
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