Studies On Accretion Onto Kiselev Black Hole,Reissner-Nordstr?m Black Hole And Kerr-Newman Black Hole Moving At A Constant Velocity

This paper studied the accretion onto stationary K iselev black hole,Reissner-Nordstr?m black hole and Kerr-Newman black hole moving at a constant velocity.In the first part,we discussed the accretion onto the stationary K iselev black hole.Under the hypotheses that back-reaction is neglected and no particles are created and annihilated,we obtained the basic equations for the adiabatic accretion flow of matter approximated by perfect gas and calculated general analytic expressions for mass accretion rate;we determined the physical conditions which the critical points should fulfil;we gave the specific expression of mass accretion rate for polytropic gas;we obtained the gas compression for polytropic gas and the adiabatic temperature profile for polytropic Maxwell-Boltzmann gas at the outer horizon;these results are clearly dependent on quintessence parameter of characteristic of K iselev black hole ?,indicating that the quintessence parameter of characteristic of K iselev black hole ? plays an important role in the accretion process,which may be an observational feature to test the theory and examine whether the quintessence scalar field exists or not.In the second part,we discussed the accretion onto Reissner-Nordstr?m black hole and Kerr-Newman black hole moving at a constant velocity.Supposing the conservation of the number of particles and the dragged matter is perfect fluid with the adiabatic equation of state P=? ?n~2(units that c=G=1),we determined the field of four-velocity of accretion flow;for Reissner-Nordstr?m black hole,it possesses axial symmetry;for Kerr-Newman black hole,it doesn't possess spherical or axial symmetry.We also obtained the accretion rate which depends on the basic parameter of black hole;for Reissner-Nordstr?m black hole,the accretion rate depends on the mass and charge;for Kerr-Newman black hole,it depends on the mass,charge and angular momentum,while it is independent of the orientation of the black hole's spin with respect to the direction of the movement of flow at infinitely large distance.