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    • Standing shocks in magnetized dissipative accretion flow around black holes

      BIPLOB SARKAR SANTABRATA DAS

      Review Volume 39 Issue 1 February 2018 Article ID 0003

    • Fulltext

       

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      Permanent link:
      https://www.ias.ac.in/article/fulltext/joaa/039/01/0003

    • Keywords

       

      Accretion—accretion discs—black hole physics—magneto-hydrodynamics—shock waves.

    • Abstract

       

      We explore the global structure of the accretion flow around a Schwarzschild black hole where the accretion disc is threaded by toroidal magnetic fields. The accretion flow is optically thin and advection dominated. The synchrotron radiation is considered to be the active cooling mechanism in the flow. With this, we obtain the global transonic accretion solutions and show that centrifugal barrier in the rotating magnetized accretion flow causes a discontinuous transition of the flow variables in the form of shock waves. The shock properties and the dynamics of the post-shock corona are affected by the flow parameters such as viscosity,cooling rate and strength of the magnetic fields. The shock properties are investigated against these flow parameters.We further show that for a given set of boundary parameters at the outer edge of the disc, accretion flow around a black hole admits shock when the flow parameters are tuned for a considerable range.

    • Author Affiliations

       

      BIPLOB SARKAR1 SANTABRATA DAS1

      1. Indian Institute of Technology Guwahati, Guwahati 781 039, India.

    • Dates

       
      Published
      15 February 2018
      Manuscript received
      30 August 3017
      Accepted
      4 December 2017
      Final version published online
      9 February 2018

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