Three-dimensional simulations of magnetized thin accretion disks around black holes: Stress in the plunging region

Rebecca Shafee, Jonathan C. McKinney, Ramesh Narayan, Alexander Tchekhovskoy, Charles F. Gammie, Jeffrey E. McClintock

Research output: Contribution to journalArticle

Abstract

We describe three-dimensional general relativistic magnetohydrodynamic simulations of a geometrically thin accretion disk around a nonspinning black hole. The disk has a thickness h/r ∼ 0.05-0.1 over the radial range (2-20)GM/c2. In steady state, the specific angular momentum profile of the inflowing magnetized gas deviates 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.

Original languageEnglish (US)
Pages (from-to)L25-L28
JournalAstrophysical Journal
Volume687
Issue number1
DOIs
StatePublished - Nov 1 2008

Keywords

  • Accretion, accretion disks-binaries
  • Close-black hole physics-X-rays
  • Stars

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

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