33ND INTERNATIONAL COSMIC RAY CONFERENCE, RIO DE JANEIRO 2013 THE ASTROPARTICLE PHYSICS CONFERENCE Modulated gamma-ray emission from milisecond pulsar binary systems

Abstract: We consider the interaction of a millisecond pulsar wind with a very inhomogeneous stellar wind from the companion star within binary system of the Black Widow or Redback types. In such case the winds should mix efficiently in the collision region. They move outside the binary with a relatively low velocity. Electrons accelerated in such mixed, turbulent winds can efficiently interact with the strong radiation field. They produce not only synchrotron radiation but also γ-rays in the the Inverse Compton process. We calculate the GeV-TeV gamma-ray fluxes expected from some millisecond pulsar binary systems and confront them with sensitivities of the present and future gamma-ray telescopes. It is concluded that millisecond pulsar binary systems can create a new class of TeV gamma-ray sources. The TeV γ-ray light curve from the millisecond pulsar binary systems is expected to have the maximum when the compact object is behind the companion star. This is in contrust to the emission features observed in the case of massive TeV gamma-ray binaries such as LS I 303 61 or LS 5039