Turbulent magnetohydrodynamic dynamo for accretion disks using the cross-helicity effect

Abstract

view Abstract Citations (54) References (19) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Turbulent Magnetohydrodynamic Dynamo for Accretion Disks Using the Cross-Helicity Effect Yoshizawa, Akira ; Yokoi, Nobumitsu Abstract Accretion disks are studied using the concept of the turbulent magnetohydrodynamic (MHD) dynamo. Under this concept, the effect of cross helicity (magnetic-field/velocity correlation function) plays a key role as does the effect of turbulent viscosity and anomalous resistivity. In the presence of the cross helicity, the rotational motion of the disk can generate the toroidal magnetic field. The magnetic field produces the thrust for launching the jet which, in turn, induces the poloidal magnetic field under the cross-helicity effect. The close relationship between the magnetic field and the plasma velocity is a primary feature of the cross-helicity dynamo. Publication: The Astrophysical Journal Pub Date: April 1993 DOI: 10.1086/172535 Bibcode: 1993ApJ...407..540Y Keywords: Accretion Disks; Dynamo Theory; Magnetohydrodynamic Turbulence; Astronomical Models; Computational Astrophysics; Interstellar Magnetic Fields; Jet Flow; Magnetic Field Configurations; Astrophysics; ACCRETION; ACCRETION DISKS; GALAXIES: JETS; ISM: JETS AND OUTFLOWS; MAGNETOHYDRODYNAMICS: MHD; TURBULENCE full text sources ADS |