12-20 July 2017
Asia/Seoul timezone
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BEXCO - Room E(106/107)

[GA292] Onset of turbulence in thick accretion flows onto black holes and the possible origin of X-ray flare phenomena in Sgr A*


  • Chandra Bahadur SINGH

Primary authors



Sgr A*, the variable source at the center of the Milky Way galaxy, is the closest supermassive black hole candidate which is interesting to understand the origin of outflows and flare phenomena in low luminosity AGNs. It has been under frequent study and the black hole astrophysics community awaits for results from further simultaneous multiwavelength monitoring in April 2017. For this purpose, we explore the role of magnetic field and possible onset of turbulence leading to the magnetorotational instability (MRI) in thick accretion flows with cases of low and high angular momentum. For this aim, we performed numerical MHD simulations using a pseudo-Newtonian potential. Our results suggest a possible interpretation of the observed X-ray flare phenomena of Sgr A*, as induced by the unstable mass-inflow-outflow phenomena.