Shafee, RebeccaMcKinney, Jonathan C.Narayan, RameshTchekhovskoy, AlexanderGammie, Charles F.McClintock, Jeffrey E.2016-08-042008Shafee, Rebecca, Jonathan C. McKinney, Ramesh Narayan, Alexander Tchekhovskoy, Charles F. Gammie, and Jeffrey E. McClintock. 2008. “Three-Dimensional Simulations of Magnetized Thin Accretion Disks Around Black Holes: Stress in the Plunging Region.” The Astrophysical Journal 687 (1) (October 3): L25–L28. doi:10.1086/593148.0004-637Xhttp://nrs.harvard.edu/urn-3:HUL.InstRepos:27804416We describe three-dimensional general relativistic magnetohydrodynamic simulations of a geometrically thin accretion disk around a nonspinning black hole. The disk has a thickness over the radial range h/r ∼ 0.05–0.1. In steady state, the specific angular momentum profile of the inflowing magnetized gas deviates 2 (2–20)GM/c by less than 2% from that of the standard thin disk model of Novikov and Thorne. Also, the magnetic torque at the radius of the innermost stable circular orbit (ISCO) is only ∼2% of the inward flux of angular momentum at this radius. Both results indicate that magnetic coupling across the ISCO is relatively unimportant for geometrically thin disks.en-USaccretion, accretion disksbinaries: closeblack hole physicsX-rays: starsJournal Article2016-08-0410.1086/593148