Tuesday, April 18 2017

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A large number of new Black Widow (BW) and Redback (RB) binary systems have been discovered through radio searches of unidentified Fermi sources, increasing the known number of these systems from 4 to 28. These exotic systems consist of a rotation-powered millisecond pulsar and a low-lass companion star that is being intensely heated and ablated by the pulsar wind. High-energy emission is expected from particles accelerated to several TeV in the intrabinary shocks in BW and RB systems, and should be modulation at the binary orbital period.