GRMHD simulations of magnetized advection-dominated accretion on a non-spinning black hole: role of outflows

DSpace/Manakin Repository

GRMHD simulations of magnetized advection-dominated accretion on a non-spinning black hole: role of outflows

Citable link to this page

 

 
Title: GRMHD simulations of magnetized advection-dominated accretion on a non-spinning black hole: role of outflows
Author: Narayan, Ramesh; Sadowski, Aleksander; Penna, Robert Francis; Kulkarni, Akshay K.

Note: Order does not necessarily reflect citation order of authors.

Citation: Narayan, Ramesh, Aleksander S?dowski, Robert F. Penna, and Akshay K. Kulkarni. 2012. “GRMHD Simulations of Magnetized Advection-Dominated Accretion on a Non-Spinning Black Hole: Role of Outflows.” Monthly Notices of the Royal Astronomical Society 426 (4) (November 11): 3241–3259.
Full Text & Related Files:
Abstract: We present results from two long-duration GRMHD simulations of advection-dominated accretion around a non-spinning black hole. The first simulation was designed to avoid significant accumulation of magnetic flux around the black hole. This simulation was run for a time of 200,000GM/c^3 and achieved inflow equilibrium out to a radius \sim90GM/c^2. Even at this relatively large radius, the mass outflow rate \dot{M}_{out} is found to be only 60% of the net mass inflow rate \dot{M}_{BH} into the black hole. The second simulation was designed to achieve substantial magnetic flux accumulation around the black hole in a magnetically arrested disc. This simulation was run for a shorter time of 100,000GM/c^3. Nevertheless, because the mean radial velocity was several times larger than in the first simulation, it reached inflow equilibrium out to a radius \sim170GM/c^2. Here, \dot{M}_{out} becomes equal to \dot{M}_{BH} at r\sim 160GM/c^2. Since the mass outflow rates in the two simulations do not show robust convergence with time, it is likely that the true outflow rates are lower than our estimates. The effect of black hole spin on mass outflow remains to be explored. Neither simulation shows strong evidence for convection, though a complete analysis including the effect of magnetic fields is left for the future.
Published Version: doi:10.1111/j.1365-2966.2012.22002.x
Terms of Use: This article is made available under the terms and conditions applicable to Other Posted Material, as set forth at http://nrs.harvard.edu/urn-3:HUL.InstRepos:dash.current.terms-of-use#LAA
Citable link to this page: http://nrs.harvard.edu/urn-3:HUL.InstRepos:11876965
Downloads of this work:

Show full Dublin Core record

This item appears in the following Collection(s)

 
 

Search DASH


Advanced Search
 
 

Submitters