Abstract Details

Name: Sachin Kaothekar
Affiliation: Mahakal Institute of Technology and Management, Ujjain
Conference ID: ASI2021_45
Title : Effects of Neutral Collisions and Radiative Heat-Loss Functions on Thermal Instability of Partially-Ionized Plasma
Authors and Co-Authors : Sachin Kaothekar1 1Department of Physics Mahakal Institute of Technology & Management, Ujjain-456664, M.P., India.
Abstract Type : Poster
Abstract Category : Stars, ISM and Galaxy
Abstract : The effect of neutral friction and radiative heat-loss function on the thermal instability of viscous two-component plasma has been investigated incorporating the effects of finite electrical resistivity and thermal conductivity. A general dispersion relation is obtained using the normal mode analysis method with the help of relevant linearized perturbation equations of the problem and a modified thermal condition of instability is obtained. We find that the thermal instability condition is modified due the presence of radiative heat-loss function, thermal conductivity and neutral particle. For the case of longitudinal propagation we find that the condition of thermal instability is independent of the magnetic field strength, finite electrical resistivity and viscosity of two-components, but depends on the radiative heat-loss function, thermal conductivity and neutral particle. From the curves we find that the temperature dependent heat-loss function, thermal conductivity and viscosity of two-components shows stabilizing effect, while density dependent heat-loss function and finite electrical resistivity shows destabilizing effect. The effect of neutral collision frequency is destabilizing. These results are helpful in understanding the process of star formation and structure formation in HI region.