Physics – Plasma Physics
Scientific paper
Nov 2004
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004aps..dppcm1006k&link_type=abstract
American Physical Society, 46th Annual Meeting of the Division of Plasma Physics, 15-19 November, 2004, Savannah, GA. MEETING I
Physics
Plasma Physics
Scientific paper
Magnetic fields are believed to play a key role in the powering of astrophysical jets (through extraction of rotational kinetic energy from a compact central mass or its surrounding accretion disk) and in the acceleration and collimation of these outflows. Using semianalytic MHD models, I address the following issues: (1) How are jets launched from accretion disks? Can one construct equilibrium configurations of magnetic disk/jet systems, and are they stable? (2) How do magnetic stresses accelerate and collimate the flow? What are the distinguishing features of hydromagnetic acceleration and how do they manifest themselves when other driving forces are also present? What are the similarities and differences between nonrelativistic outflows (as in young stellar objects) and relativistic jets (as in gamma-ray burst sources and the blazar class of active galactic nuclei)? (3) How does the magnetic field advected by the flow influence the equilibrium structure of the jet beyond the acceleration region?
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