Extragalactic jets driven by Alfven waves

Details Extragalactic jets driven by Alfven waves Extragalactic jets driven by Alfven waves

Nov 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993a%26a...279..351g&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 279, no. 2, p. 351-358

Astronomy and Astrophysics

Astronomy

13

Astronomical Models, Dynamo Theory, Galactic Nuclei, Magnetohydrodynamic Waves, Plasma Turbulence, Radio Jets (Astronomy), Stellar Magnetic Fields, Stellar Winds, Bipolarity, Magnetic Field Reconnection, Mathematical Models, Rotating Plasmas, Stellar Mass Ejection

Scientific paper

We suggest that Alfven waves, which can be created above the steep density gradients present near galactic nuclei, are the origin of bipolar jets observed in extragalactic sources. The differential rotation and turbulent motion in galactic nuclei create a bipolar magnetic field by dynamo-action and the twisting and the reconnection of the magnetic field lines produce Alfven waves. Non-linear damping, resonance surface damping, and turbulent damping are investigated. Adopting typical values for the physical parameters for the extragalactic jets, we study the Alfven wave fluxes which reproduce the observational data of these jets from 1 pc to 100 kpc from the galactic nuclei.

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