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EFFECTS OF WINDS ON THE STABILITY OF A THIN DISK

  • LI, SHUANG-LIANG (Key Laboratory for Research in Galaxies and Cosmology, Shanghai Astronomical Observatory, Chinese Academy of Sciences)
  • Received : 2014.11.30
  • Accepted : 2015.06.30
  • Published : 2015.09.30

Abstract

Standard thin disk theory predicts that an inner disk region dominated by radiation pressure is thermally unstable. However, this kind of instability isn't detected in the observations of X-ray binaries. In this work, we revisit this issue by investigating the stability of a thin disk with magnetically driven winds. It is found that the disk winds can help to make a thin disk stable by taking away most of the energy released in the disk, resulting in a much cooler disk. The disk can always be stable even for a very weak initial field strength ${\beta}_{p,0}{\leq}400$ when ${\alpha}=0.05$ and $B{\phi}=10B_p$ are adopted.

Keywords

References

  1. Gierlinski, M. & Done, C., 2004, Black Hole Accretion Discs:Reality Confronts Theory, MNRAS, 347, 885 https://doi.org/10.1111/j.1365-2966.2004.07266.x
  2. Li S. -L. & Begelman, M. C., 2014, Thermal Stability of a Thin Disk with Magnetically Driven Winds, ApJ, 786, 6 https://doi.org/10.1088/0004-637X/786/1/6
  3. Shakura N. I. & Sunyaev R. A., 1973, Black Holes in Binary Systems. Observational Appearance, A&A, 24, 337