Generation and Collimation Mechanisms of Relativistic Jets in AGN

Abera, Shiferaw (2006) Generation and Collimation Mechanisms of Relativistic Jets in AGN. Masters thesis, Addis Ababa University.

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Most of the phenomenon performed by active galaxies are left uncovered among which highly collimated jet-like outflows, that span hounders of Kpc to Mpc via interstellar medium, is the one. Our current research, which is fully analytic, is targeted on flnding the plausible mechanism of jets generation and collimation in these Mysterious active galaxies. In this work, Kerr geometry is preferred to describe the dynamics of electromagnetic fleld and plasma fluid around rotating Kerr black hole. we flnd 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 fleld and centrifugal force, on the accreting plasma fluid, are the key elements for the generation and launching of jets. Collimation of jets is the responsibility of: magnetic hoop stress, radiation pressure, from the accretion disk, and centrifugal force. Also, magnetic fleld is found to be crucially important in extracting the spin energy of the black hole. Energy and angular momentum are continuously supplied to the jets through difierential rotation.

Item Type: Thesis (Masters)
Subjects: Q Science > Q Science (General)
Q Science > QC Physics
T Technology > T Technology (General)
T Technology > TJ Mechanical engineering and machinery
Divisions: Africana
Depositing User: Selom Ghislain
Date Deposited: 14 Jun 2018 10:01
Last Modified: 14 Jun 2018 10:01

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