2006A&A...452..773K


C.D.S. - SIMBAD4 rel 1.7 - 2021.02.26CET17:37:40

2006A&A...452..773K - Astronomy and Astrophysics, volume 452, 773-779 (2006/6-4)

On the mean field dynamo with Hall effect.

KANDUS A., VASCONCELOS M.J. and CERQUEIRA A.H.

Abstract (from CDS):

MHD turbulence with Hall effect. Study how Hall effect modifies the quenching process of the electromotive force (e.m.f.) in Mean Field Dynamo (MFD) theories. We write down the evolution equations for the e.m.f. and for the large and small scale magnetic helicity, treat Hall effect as a perturbation and integrate the resulting equations, assuming boundary conditions such that the total divergencies vanish. For force-free large scale magnetic fields, Hall effect acts by coupling the small scale velocity and magnetic fields. For the range of parameters considered, the overall effect is a stronger quenching of the e.m.f. than in standard MHD and a damping of the inverse cascade of magnetic helicity. In astrophysical environments characterized by the parameters considered here, Hall effect would produce an earlier quenching of the e.m.f. and consequently a weaker large scale magnetic field.

Abstract Copyright:

Journal keyword(s): magnetohydrodynamics (MHD) - plasmas - turbulence

Simbad objects: 0

goto Full paper

goto View the reference in ADS

Number of rows : 0

To bookmark this query, right click on this link: simbad:objects in 2006A&A...452..773K and select 'bookmark this link' or equivalent in the popup menu


2021.02.26-17:37:40

© Université de Strasbourg/CNRS

    • Contact