• RAMIZ AKTAR

      Articles written in Journal of Astrophysics and Astronomy

    • Advective accretion flow properties around rotating black holes – application to GRO J1655-40

      RAMIZ AKTAR SANTABRATA DAS ANUJ NANDI H. SREEHARI

      More Details Abstract Fulltext PDF

      We examine the properties of the viscous dissipative accretion flow around rotating black holes in the presence of mass loss. Considering the thin disc approximation, we self-consistently calculate the inflow-outflow solutions and observe that the mass outflow rates decrease with the increase in viscosity parameter ($\alpha$). Further, we carry out the model calculation of quasi-periodic oscillation frequency ($\nu_{\rm QPO}$) that is frequentlyobserved in black hole sources and observe that $\nu^{\max}_{\rm QPO}$ increases with the increase of black hole spin ($a_{\rm k}$). Then, we employ our model in order to explain the High Frequency Quasi-Periodic Oscillations (HFQPOs) observedin black hole source GROJ1655-40. While doing this, we attempt to constrain the range of $a_k$ based on observed HFQPOs ($\sim$300 Hz and $\sim$450 Hz) for the black hole source GRO J1655-40.

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