Abstract:Colliding-wind binaries are massive stellar systems featuring strong, interacting stellar winds. The resulting shocks may act as effective particle accelerators, making them good candidates for detection at high energies. However, only the massive binary η Carinae (with an orbital period of ∼ 5.5 years) has been firmly identified as a γ-ray source. A second system, γ 2 Velorum, was found positionally coincident with a γ-ray signal, with solid evidence of orbital variability along its orbit. Thus massive binari… Show more
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