Relevance of jet emitting disc physics to microquasars: application to Cygnus X-1

摘要: Context. Interpretation of the X-ray spectra binaries during their hard states requires a hot, optically thin medium. There are several accretion disc models that account for this aspect. However, none is designed to simultaneously explain powerful jets detected these states. Aims. A new quasi-Keplerian hot solution, jet emitting (JED hereafter), which part global disc-jet MHD structure producing stationary super-alfvenic ejection, investigated here. Its radiative and energetic properties then compared observational constraints found in Cygnus X-1. Methods. We solve energy equation by balancing local heating term with advection cooling synchrotron, bremsstrahlung, Comptonization processes. The term, density, velocity, magnetic field amplitude were taken from published self-similar accretion-ejection structures. Both thick regimes considered one-temperature, gas-supported disc. Results. Three branches solutions be possible at given radius, but we only investigate geometrically slim solutions. These give consistently energetics discjet system. They able reproduce X-1 very well, namely its spectral emission, power, velocity. About half released power used produce two mildly relativistic (v/c � 0.5) jets, luminosity about 1% Eddington luminosity, JED temperature optical depth close what observed state Conclusions. ejection JEDs agree observations prototypical black hole binary likely relevant whole class microquasars.