We carry out a general relativistic study of radiatively driven fluid jets around black holes and investigate the effects and significance of radiative acceleration, as well as radiation drag.
We apply relativistic equations of motion in curved space-time for the jet, plying through the radiation field of the accretion disc. Radiative moments were computed using the information of
curved space-time. Slopes of physical variables at the sonic points are found using L'Hospital's rule and employed Runge-Kutta's $4^{th}$ order method to solve equations of motion. The analysis is carried out, using the relativistic equation of state of the jet fluid.
The terminal speed of the jet depends on how much thermal energy is converted into jet momentum
and how much radiation momentum is deposited on to the jet. Jets with terminal Lorentz factors up to $\gamt\sim 3$ are obtained for high energy electron-proton jets under intense radiation field. Moderate terminal speed $v_{\rm \small T} \sim 0.5$ is obtained for moderately luminous discs.
Lepton dominated jets may achieve $\gamt \sim 10$.
Many classes of jet solutions with single sonic points, as well as, radiation driven internal shocks are obtained. Along with terminal speeds, behaviour of physical quantities of the jets with distance is also studied.
Variety of jet solutions are obtained, due to the interaction of accretion disc radiation with the out-flowing jet, where the possibility of moderate jets to relativistic jets is possible depending on the intensity
of the radiation field and the energetics of the jet.
We establish that radiation field is able to induce steady shocks in jets, one of the criteria to explain high energy power law emission observed in spectra of is some of the astrophysical objects.