Abstract Details
| Name: NAVEEL AHMAD WANI Affiliation: DEPARTMENT OF PHYSICS, UNIVERSITY OF KASHMIR Conference ID: ASI2016_457 Title : Effect of Multi-stochastic Perturbations on the behaviour of Accretion Discs Authors and Co-Authors : Naveel Ahmad Wani, Ranjeev Misra and Naseer Iqbal Abstract Type : Poster Abstract Category : Stars, The Milky Way Galaxy and its neighbours Abstract : We want to study the structural changes which occur in the accretion disc in the x-ray binaries on the basis of standard α-disc model. In x-ray binaries, x-rays are emitted from the inner regions while uv emission could arise from the relatively cooler outer parts of the disc. There is now increasing evidence that the variability of the x-rays is caused by stochastic fluctuations in the accretion disc at different radii. These stochastic fluctuations arising in the outer parts of the disc, but on propagating inwards gives rise to x-ray variability and thus naturally relates the x-ray and uv variability. There are analytical expressions to qualitatively understand the effect of these stochastic variabilities, but quantitative predictions are only possible by a detailed hydrodynamical study of the global time dependent standard accretion solution. In this direction, we developed a numerically efficient code to incorporate the various effective process of the disc like gas pressure and stochastic fluctuations with the boundary effect of the last stable orbit. The code has been tested for numerical stability. |