Generation and collimation mechanisms of relativistic jets in AGN
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Date
2006-06
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Addis Ababa.
Abstract
io. lost. of the phenomenon performed by active gala.xies are lef\' uncO\'crccl among which
highly collimated jet-like outflows, that span hounders of Kpc to ~ Ipc via interstellar
medium, is l.hc one. OUf current. research, which is fully analytic, is targeted on
finding t he plausible mechanism of jets generation and collimation in Lhcse :-' Iysteriolls
active gala.xies. In this work, Kerr geomet.ry is preferred to describe t.he dynamics
of electromagnetic field and plasma fluid around rotating Kerr black hole. we find
out. that the force-free region, in the immediate neighborhood of rotating black hole,
is the site where jets generation and launching are fabricated. Toroidal magnetic
field and centrifugal force, on the accreting plasma fluid. are "he key elements for t.he
generation and launching of jets. Collimat.ion of jets is the responsibility of: magnetic
hoop stress, radiation pressure, from t.he accretion disk, and centrifugal force. Also,
magnetic field is found to be crucially important. in extract.ing the spin energy of
t.he black hole. Energy and angular momentum are continuously supplied to t he jets
through di fferential rotation.
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