Abstract Details
| Name: Bari Maqbool Affiliation: University of Kashmir Conference ID: ASI2016_657 Title : Time dependent spectrum of an X-ray irradiated accretion disc with stochastic perturbations Authors and Co-Authors : 1. Ranjeev Misra, IUCAA, Pune 2. Naseer Iqbal, Kashmir University 3. Naveel Ahmad, Kashmir University Abstract Type : Poster Abstract Category : Stars, The Milky Way Galaxy and its neighbours Abstract : The X-rays emitted by the inner regions of the accretion disk induce structural changes in the outer regions of the disk. We study here how the effective temperature and hence the corresponding spectrum of the disk is altered by stochastic perturbations in the outer regions and thereby try to study the long term variability which has been observed in some X-ray binaries. We use a time dependent global hydrodynamic code to study the variations in the effective temperature of the disk in response to sinusoidal accretion rate perturbations introduced at different radii and with different time periods. To quantify the results, we calculate the root mean square effective temperature at different radii and the root mean square flux at different frequencies. We also calculate the time-lags in accretion rate, effective temperature and the different frequencies. |