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Paper: Prospects for Detecting Colliding Winds of Massive Stars with GLAST-LAT
Volume: 367, Massive Stars in Interactive Binaries
Page: 173
Authors: Reimer, A.; Reimer, O.
Abstract: Colliding winds of massive binaries have been proposed as potential sites of non-thermal high-energy photon production. They may account for counterparts of yet unidentified EGRET sources and will presumably be detected with the next generation satellite, pair-conversion telescope, GLAST-LAT, which will be launched in the near future. Here we investigate the properties of high-energy photon production in colliding winds of long-period WR+OB-systems. We found that in the dominating leptonic radiation process, anisotropy and Klein-Nishina effects will likely yield visible spectral and variability signatures in the gamma-ray domain for highly sensitive instruments like GLAST-LAT. In addition to adiabatic and radiative losses we also include particle propagation in our modelling for the first time. The calculations are applied to WR 140 and WR 147. We predict that both systems will be visible for GLAST-LAT, and perhaps also for modern imaging atmospheric Cherenkov telescopes at some orbital phases, but hardly for INTEGRAL above 1 MeV.
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