Turbulent generation of magnetic fields in astrophysical jets

Details Turbulent generation of magnetic fields in astrophysical jets Turbulent generation of magnetic fields in astrophysical jets

Jan 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988ap%26ss.140..165g&link_type=abstract

Astrophysics and Space Science (ISSN 0004-640X), vol. 140, no. 1, Jan. 1988, p. 165-174.

Astronomy and Astrophysics

Astronomy

13

Helical Flow, Interstellar Magnetic Fields, Magnetic Field Configurations, Radio Jets (Astronomy), Turbulent Jets, Field Strength, Radio Sources (Astronomy), Velocity Distribution

Scientific paper

The authors consider evolution of the regular magnetic field in turbulent astrophysical jets. The observed lateral expansion of a jet is approximately described by a linear in coordinates regular velocity field (the Hubble flow). It is shown that in expanding turbulent jets with non-vanishing mean helicity of the turbulence temporal amplification and effective realignment of the regular magnetic field occur with the field changing orientation from the transverse to the longitudinal one along the jet axis. The distance at which the realignment occurs depends on parameters of the jet, in particular, on the power of the central source. Estimates for the jet in a weak source 3C 31 favourably agree with observations.

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