Formation of Overheated Regions and Truncated Disks around Black Holes; Three-dimensional General Relativistic Radiation-magnetohydrodynamics Simulations

Abstract

Using three-dimensional general relativistic radiation magnetohydrodynamics simulations of accretion flows around stellar mass black holes, we report that the relatively cold disk ($\gtrsim 10^7$K) is truncated near the black hole. Hot and less-dense regions, of which the gas temperature is $\gtrsim 10^9$K and more than ten times higher than the radiation temperature (overheated regions), appear within the truncation radius. The overheated regions also appear above as well as below the disk, and sandwich the cold disk, leading to the effective Compton upscattering. The truncation radius is $\sim 30r_{\mathrm{g}}$ for $\dot{M}\sim L_{\mathrm{Edd}}/c^2$, where $r_{\mathrm{g}},\dot{M},L_{\mathrm{Edd}},c$ are the gravitational radius, mass accretion rate, Eddington luminosity, and light speed. Our results are consistent with observations of very high state, whereby the truncated disk is thought to be embedded in the hot rarefied regions. The truncation radius shifts inward to $\sim 10r_{\mathrm{g}}$ with increasing mass accretion rate $\dot{M}\sim 100L_{\mathrm{Edd}}/c^2$, which is very close to an innermost stable circular orbit. This model corresponds to the slim disk state observed in ultra luminous X-ray sources. Although the overheated regions shrink if the Compton cooling effectively reduces the gas temperature, the sandwich-structure does not disappear at the range of $\dot{M}\lesssim 100L_{\mathrm{Edd}}/c^2$. Our simulations also reveal that the gas temperature in the overheated regions depends on black hole spin, which would be due to efficient energy transport from black hole to disks through the Poynting flux, resulting gas heating.

9 pages, 8 figures, 1 tables accepted for publication in ApJ

References in corpus (9)

• Modelling the behaviour of accretion flows in X-ray binaries
• Alignment of Magnetized Accretion Disks and Relativistic Jets with Spinning Black Holes
• Global simulations of axisymmetric radiative black hole accretion disks in general relativity with a sub-grid magnetic dynamo
• Semi-implicit scheme for treating radiation under M1 closure in general relativistic conservative fluid dynamics codes
• The Power of Imaging: Constraining the Plasma Properties of GRMHD Simulations using EHT Observations of Sgr A*
• Plasma diagnostic potential of 2p4f in N${}^{+}$ -- accurate wavelengths and oscillator strengths
• An Algorithm for Radiation Magnetohydrodynamics Based on Solving the Time-dependent Transfer Equation
• Higher Order Terms of Kerr Parameter for Blandford-Znajek Monopole Solution
• Radiation Drag Effects in Black Hole Outflows from Super-critical Accretion Disks via Special Relativistic Radiation Magnetohydrodynamics Simulations

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