Formation of jets in Galactic superluminal sources
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A model of major ejection events in Galactic superluminal sources GRO J1655-40 and GRS 1915-105 is proposed, in which episodes of pair creation give rise to the formation of optically thick super-Eddington outflow accelerating protons to the limiting Lorentz factor of order 2-3, Probable source of pairs is pion production in proton-proton and proton-neutron collisions which may operate efficiently even for proton temperatures equal to several MeV. Gamma-ray spectral signatures of this mechanism are pointed out. Subsequent deceleration of ejecta and formation of radio jets is analyzed in detail within a shock deceleration model. The detailed data available for GRO J1655-40 are shown to be in good agreement with proposed scenario. 1999 OPA (Overseas Publishers Association) N.V. Published by license under the Gordon and Breach Science Publishers imprint.
Astrophysical Letters and Communications
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