A Jet Acceleration Mechanism In The Compact Objects

Since black hole accretion is the standard model for the central engine of compact objects,the jet acceleration mechanism in the compact objects is investigated in the context of the kerr black hole.After a brief introduction to the kerr metric,the possible energy extraction mechanisms of the black holes and the luminosity studies related to accretion efficiency,the four accretion disk models(the mainstream is the combination of the standard disk and the ADAF disk),the disc-corona model and the viscous assumption.In the two systems of the radio jet,the BZ mechanism belongs to the electromagnetic model,it extracts the electromagnetic energy of the black hole;the BP mechanism belongs to the magnetohydrodynamic(MHD),it extracts the energy of the accretion disk,and also includes the material energy.Nowadays,BZ mechanism gains more attention,thus forms the foundation of our disc-corona model.Besides,there`re the radiation pressure model and the new magnetic tower model,some people think that the non-flat corona on the accretion is related to the indirect jet.In the second chapter,we discuss the geometrically thin,optically thick standard accretion disk model under the general relativistic framework(ie kerr gauges),and the ADAF model using kerr gauges.The black hole disc-corona model was born to explain the X-ray of the black hole binaries.This paper uses the flat corona model.In the first part of Chapter 3,after the explanation of the magnetic field configuration and the equivalent circuit model,we discuss the BZ mechanism in detail,which is related to our main work.In the second part,we propose a jet acceleration mechanism of extracting energy from a rotating black hole surrounded by disk-corona.In this disk-corona scenario,we get the value of the magnetic field in the inner region of the corona by solving the disk dynamics equations of the disk-corona system under the general relativistic framework.And the analytical expression of the jet power is calculated based on the electronic circuit theory of the magnetosphere.It is found that jet power increases obviously with the increasing black hole spin parameter a and magnetic stress parameter ??.Furthermore,the calculations also show the jet power is mainly from the inner region of the disk-corona system.Finally,an sample consisting of the 23 Fermi blazars with high jet power is used to explore our jet production mechanism.The conclusion suggests that our jet acceleration mechanism can simulate all sources with high power jet.