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arXiv:astro-ph/0504429 (astro-ph)
[Submitted on 20 Apr 2005 (v1), last revised 22 Apr 2005 (this version, v2)]

Title:Magnetic flux captured by an accretion disk

Authors:Dmitri A. Uzdensky, H. C. Spruit
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Abstract: We suggest a possible mechanism of efficient transport of the large-scale external magnetic flux inward through a turbulent accretion disk. The outward drift by turbulent diffusion which limits the effectiveness of this process is reduced if the external flux passes through the disk in concentrated patches. Angular momentum loss by a magnetocentrifugal wind from these patches of strong field adds to the inward drift. We propose that magnetic flux accumulating in this way at the center of the disk provides the `second parameter' determining X-ray spectral states of black hole binaries, and the presence of relativistic outflows.
Subjects: Astrophysics (astro-ph)
Cite as: arXiv:astro-ph/0504429
  (or arXiv:astro-ph/0504429v2 for this version)
  https://doi.org/10.48550/arXiv.astro-ph/0504429
Journal reference: Astrophys.J. 629 (2005) 960-968
Related DOI: https://doi.org/10.1086/431454

Submission history

From: H. C. Spruit [view email]
[v1] Wed, 20 Apr 2005 04:56:10 UTC (94 KB)
[v2] Fri, 22 Apr 2005 01:20:38 UTC (94 KB)
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