Abstract Details
| Name: Ritu Ravindra Vyaghrambare Affiliation: Osmania University Conference ID: ASI2018_1684 Title : A STUDY OF THE DYNAMICAL CROSS CORRELATION IN A BLACK HOLE SOURCE GROJ1655-40 Authors and Co-Authors : Ritu Vyaghrambare, K. Sriram, S. Malu Osmania University, Hyderabad Abstract Type : Poster Abstract Category : Stars,ISM and the Galaxy Abstract : Accretion disc plays an important role in studying the compact object i.e. black hole (BH) or neutron star (NS). In order to study the geometry of the accretion disk in the source GROJ1655-40, we have carried out a detailed temporal X-Ray study using Rossi X-ray Timing Explorer (RXTE) observations. I have studied the dynamical cross-correlation function using a fast algorithm for 2 input time series i.e. 0-13 and 14-35 keV. The cross-correlation function of the soft and hard X-ray photons can be used for analysing the relation of different energy bands, which is helpful for understanding the radiative and geometrical structure of the accretion disk. We found both soft and hard delays of the order of -5 s to +15 s. The observed delays are relatively higher than the Comptonization time scales and much shorter than the viscous time scales. Based on Spectral studies along with dynamical cross-correlation function, we suggest that the delays are due to small viscous time scale during which the Compton Cloud adjust. |