The Interpretation of Multi-Wavelength Spectra in SNR G347.3-0.5 (RX J1713.7-3946)

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X-Ray, Radio, Supernova Remnants

Scientific paper

The recent CANGAROO detection of TeV γ-rays from the southern hemisphere remnant RX J1713.7-3946 (G347.3-0.5) has spawned a debate over whether this data provides evidence for the production of cosmic ray ions in this source. The discovery paper of Enomoto et al. argued against an inverse Compton origin for these photons from a population of electrons that generates radio to X-ray synchrotron emission. Such conclusions were predicated on a limited test-particle (linear) model for shock acceleration. Non-linear models of acceleration are widely regarded as appropriate for remnant shells, and generate multi-wavelength spectra that can differ significantly from test-particle predictions. This paper explores such non-linear models and the expectations for radio/X-ray synchrotron spectra, and inverse Compton γ-ray spectra. It is found that reasonable values of environmental parameters such as density and magnetic field strength, adjusted only modestly from the previous analysis of Ellison et al., can yield acceptable fits to the radio, X-ray, and TeV fluxes and spectra, and can accommodate the constraining bounds imposed by a proximate unidentified EGRET source.

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