Transient gamma-ray emission from Cygnus X-3

Heidelberg, Alemania

Simposio; 25th Texas Symposium on Relativistic Astrophysics; 2010

The high-mass microquasar Cygnus X-3 hasbeen recently detected in a flaring state by the gamma-ray satellitesFermi and Agile. In the present  contribution, we study the high-energyemission from Cygnus X-3 through a model based on the interaction ofclumps from the Wolf-Rayet wind with the jet. The clumps inside the jet act asobstacles in which shocks are formed leading to particle accelerationand non-thermal emission. We model the high energy emission  producedby the interaction of one clump with the jet and briefly discus the possibilityof many clumps interacting with the jet. From the characteristics ofthe considered scenario, the produced emission could be flare-like dueto discontinuous clump penetration, with the GeV long-term activityexplained by changes in the wind properties.