Stability of Accretion Discs around Magnetized Stars - International Journal of Astronomy and Astrophysics

IJAA > Vol.4 No.2, June 2014

Stability of Accretion Discs around Magnetized Stars ()

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Download as PDF (Size: 598KB) PP. 319-331

DOI: 10.4236/ijaa.2014.42026 4,113 Downloads 6,269 Views Citations

Author(s)

Solomon Belay Tessema

Affiliation(s)

Department of Physics, Kotebe University College, Addis Ababa, Ethiopia.

ABSTRACT

We study the stability of accretion disc around magnetised stars. Starting from the equations of magnetohydrodynamics we derive equations for linearized perturbation of geometrically thin, optically thick axisymmetric accretion disc with an internal dynamo around magnetized stars. The structure and evolution of such discs are governed by an evolution equation for matter surface density ∑(R,T). Using the time-dependent equations for an accretion disc we do a linear stability analysis of our steady disc solutions in the presence of the magnetic field generated due to an internal dynamo.

KEYWORDS

Accretion, Accretion Discs, Instabilities, Stability, Magnetic Fields, MHD, Stars, Neutron, X-Rays, Binaries

Share and Cite:

Tessema, S. (2014) Stability of Accretion Discs around Magnetized Stars. International Journal of Astronomy and Astrophysics, 4, 319-331. doi: 10.4236/ijaa.2014.42026.

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