Abstract Details
| Name: SOUMEN MONDAL Affiliation: Jadavpur University, Kolkata Conference ID: ASI2019_299 Title : On the properties of dissipative shocks in relativistic accretion flows around black holes. Authors and Co-Authors : Author: Soumen Mondal, Department of Physics, Jadavpur University, Kolkata. Abstract Type : Oral Abstract Category : General Relativity and Cosmology Abstract : In the present work, we study the effects on the accretion and wind flows due to the energy dissipation from the post-shock region (or from the Compton cloud ). Results of our previous work (Das, Chakrabarti, Mondal, 2010) motivate us to explore the various features of the standing and dissipative shocks in the accretion and wind flows using exact relativistic equations. Thus, the results could significantly be different from that found in the previous works based on Pseudo Newtonian treatment. As the radiative processes crucially depend on its hydro-dynamical features of the accretion disk, therefore, the results of our study would be extremely useful in providing a rigorous interpretation of EM-spectrum coming from the disk. Moreover, the oscillation of the shock location could be important to excite the quasi-periodic oscillations (QPOs) in the emitted radiation. Such an evolution of QPOs has been observed in several black hole candidates during their outbursts e.g. XTE 1550−564 and GRO J1655−40. Motivating from the current scenario, in the present study, we would like to focus on the following issues: (i) we study the properties of standing and dissipative shocks in the accretion flow using exact general relativistic framework and study the spin effect on the shocks (ii) then considering a wide range of the parameters namely energy, angular momentum of the flow and spin parameter of the black hole, we wish to investigate, the maximum percentage of total energy (iii) further, we would also like to find the effects on the mass outflow rates from the accreting matter. |