Astronomy and Astrophysics – Astrophysics
Scientific paper
Sep 2002
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002bhap.conf..207b&link_type=abstract
BLACK HOLE ASTROPHYSICS 2002 . Proceedings of the Sixth APCTP Winter School . Held 9-12 January 2002 in Pohang, Korea. Edited by
Astronomy and Astrophysics
Astrophysics
Scientific paper
Jet formation is connected most probably with matter acceleration from the vicinity of rotating magnetized bodies. It is usually related to the mass outflows and ejection from accretion disks around black holes. Problem of jet collimation is discussed. Collapse of a rotating magnetized body during star formation or super-novae explosion may lead to a jet-like mass ejection for certain angular velocity and magnetic field distributions at the beginning of the collapse. Jet formation during magnetorotational explosion is discussed basing on the numerical simulation of collapse of magnetized bodied with quasi-dipole field. Calculations for initial quadrupole-like magnetic field gave ejection concentrated to the equatorial plane. Part of the matter ~ 7% of the mass of the cloud (3.3% of the final gravitational energy of the cloud) is thrown away to infinity, This part of the cloud carries about 30% of the initial angular momentum of the cloud. For the simulations we used specially developed completely conservative implicit 2D Lagrangian scheme on triangular grid with grid reconstruction.
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