Authorisation
Unified generalized model of Dynamo and transient flow generation in Stellar Atmospheres
Author: Alexander BarnaveliAnnotation:
In present thesis we investigated the flow acceleration and magnetic field generation phenomena in atmospheres of compact stars with degenerate electrons based on quasi-equilibrium approach developed in [1]. The obtained parameters will later constitute the equilibrium state-characteristic values to study the Unified generalized model of Dynamo/Reverse Dynamo [2] and transient flow generation in such environments. In our study classical gravity is included as well as electron-ion plasma with degenerate electrons is taken compressible. We assumed that there exist fully ionized and magnetized plasma structures at some height so that the quasi-equilibrium two-fluid model will capture the essential physics of flow acceleration/generation. We found, that there is a catastrophe in the system. Following are the significant results obtained throughout the study: finding the appropriate physical parameter regions for flow generation/acceleration in White Dwarfs outer layers/atmospheres; dependence of the flow strength on the compactness of the layer; the possibility of the super-Alfvénic flow generation in White Dwarf outer layer; the possibility of simultaneous flow acceleration and magnetic field generation for specific parameters of the system; The possibility of transient jet formation. References [1] S.M. Mahajan, K.I. Nikol’skaya, N.L. Shatashvili and Z. Yoshida. Astrophys, J., 576, L161 (2002). [2] S.M. Mahajan, N.L. Shatashvili, S.V. Mikeladze and K.I. Sigua, Astrophys. J. 634, 419 (2005).