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

2010/09/09 by Mradul Sharma
Physics and Astronomy · #Accretion (finance) #Angular momentum #Astrophysical Phenomena and Observations #Astrophysics #Astrophysics and Star Formation Studies #Atomic and Molecular Physics #Classical mechanics #Flow (mathematics) #Instability #Magnetic field #Magnetohydrodynamic drive #Magnetohydrodynamic turbulence #Magnetohydrodynamics #Magnetorotational instability #Mechanics #Physics #Turbulence #astro-ph.GA #physics.flu-dyn

paper · pdf · doi:10.1103/physreve.82.037302

published as Phys.Rev.E82:037302,2010

openalex publication_date 2010/09/09 · arxiv created 2010/09/12 · arxiv updated 2014/11/21 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05

Abstract

The transport of angular momentum in the outward direction is the fundamental requirement for accretion to proceed in an accretion disk. 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 nonvanishing 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.

Citations

• Evolution of bimodal accretion flows
• Angular Momentum Transport by Magnetohydrodynamic Turbulence in Accretion Disks: Gas Pressure Dependence of the Saturation Level of the Magnetorotational Instability
• A powerful local shear instability in weakly magnetized disks. I - Linear analysis. II - Nonlinear evolution
• The Stability of Magnetized Rotating Plasmas with Superthermal Fields
• Magnetohydrodynamic instability in differentially rotating compressible flow
• Stability, Instability, and “Backward” Transport in Stratified Fluids