High-growth-rate magnetohydrodynamic instability in differentially rotating compressible flow

Details High-growth-rate magnetohydrodynamic instability in differentially rotating compressible flow High-growth-rate magnetohydrodynamic instability in differentially rotating compressible flow

2010-09-12

arxiv.org/abs/1009.2234v1

Phys. Rev. E 82, 037302 (2010)

Astronomy and Astrophysics

Astrophysics

Galaxy Astrophysics

Scientific paper

10.1103/PhysRevE.82.037302

The transport of angular momentum in the outward direction is the fundamental requirement for accretion to proceed in an accretion disc. This objective can be achieved if the accretion flow is turbulent. Instabilities are one of the sources for the turbulence. We study a differentially rotating compressive flow in the presence of non vanishing radial and azimuthal magnetic field and demonstrate the occurrence of a high growth rate instability. This instability operates in a region where magnetic energy density exceeds the rotational energy density.

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