Query : 2006A&A...455..779U

2006A&A...455..779U - Astronomy and Astrophysics, volume 455, 779-784 (2006/9-1)

Generation of the magnetic field in jets.


Abstract (from CDS):

We consider dynamo action under the combined influence of turbulence and large-scale shear in sheared jets. Shear can stretch turbulent magnetic field lines in such a way that even turbulent motions showing mirror symmetry become suitable for generation of a large-scale magnetic field. We derive the integral induction equation governing the behaviour of the mean field in jets. The main result is that sheared jets may generate a large-scale magnetic field if shear is sufficiently strong. The generated mean field is mainly concentrated in a magnetic sheath surrounding the central region of a jet, and it exhibits sign reversals in the direction of the jet axis. Typically, the magnetic field in a sheath is dominated by the component along the jet that can reach equipartition with the kinetic energy of particles. The field in the central region of jets has a more disordered structure.

Abstract Copyright:

Journal keyword(s): magnetohydrodynamics (MHD) - ISM: jets and outflows - galaxies: jets - ISM: magnetic fields - gravitational lensing - magnetic fields

Simbad objects: 3

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Number of rows : 3
N Identifier Otype ICRS (J2000)
ICRS (J2000)
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2022
1 NGC 315 LIN 00 57 48.8590525608 +30 21 08.842041360 12.80 12.20 11.16 11.26   ~ 744 2
2 M 106 Sy2 12 18 57.620 +47 18 13.39   9.14 8.41 8.11   ~ 2228 3
3 M 87 BiC 12 30 49.42338230 +12 23 28.0438581 10.16 9.59 8.63   7.49 ~ 6649 3

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