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Novel mechanism for vorticity generation in black-hole accretion disks
Bhattacharjee C., Das R., Mahajan S.M.
Published in American Physical Society
2015
Volume: 91
   
Issue: 12
Abstract
Vorticity generation in accretion disks around Schwarzschild and Kerr black holes is investigated in the context of magnetofluid dynamics derived for both General Relativity (GR) and modified gravity formulations. In both cases, the Kerr geometry leads to a "stronger" generation of vorticity than its Schwarzschild counterpart. Of the two principal sources, the relativistic drive peaks near the innermost stable circular orbit (isco), whereas the baroclinic drive dominates at larger distances. Consequences of this new relativistic vorticity source are discussed in several astrophysical settings. © 2015 American Physical Society.
Figures & Tables (8)
  • Figure-0
    FIG. 1 (color online). Temperature profile ... Expand
  • Figure-1
    FIG. 2 (color online). Lorentz factor for Schwarzschild (green) ... Expand
  • Figure-2
    FIG. 4 (color online). Vorticitymagnitude (in the units ... Expand
  • Figure-3
    FIG. 3 (color online). Vorticity magnitude (in the units ... Expand
  • Figure-4
    FIG. 5 (color online). Vorticity Ω (in the units of Gauss) ... Expand
  • Figure-5
    FIG. 6 (color online). Vorticity Ω (in the units of Gauss) ... Expand
  • Figure-6
    FIG. 7 (color online). Ratio between relativistic ... Expand
  • Figure-7
    FIG. 8 (color online). Ratio between the relativistic ... Expand
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Published in American Physical Society
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