Hostname: page-component-cb9f654ff-hqlzj Total loading time: 0 Render date: 2025-08-26T18:28:02.866Z Has data issue: false hasContentIssue false
  • English
  • Français

Three Dimensional MHD Simulations of Parker Instability in Differentially Rotating Disk

Published online by Cambridge University Press:  12 April 2016

T. Matsuzaki ,
R. Matsumoto ,
T. Tajima  and
K. Shibata
T. Matsuzaki
Affiliation:
Department of Physics, Faculty of Science, Chiba University, 1–33 Yayoi-Cho, Inage-Ku, Chiba 263, Japan
R. Matsumoto*
Affiliation:
Department of Physics, Faculty of Science, Chiba University, 1–33 Yayoi-Cho, Inage-Ku, Chiba 263, Japan
T. Tajima
Affiliation:
Institute for Fusion Studies, University of Texas at Austin, Austin, TX 78712, USA
K. Shibata
Affiliation:
National Astronomical Obserbatory, Mitaka, Tokyo 181, Japan
*
Advanced Science Research Center, JAERI, Naka, Japan

Abstract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

Nonlinear growth of the Parker instability (PI) and the Balbus & Hawley instability (BHI) in accretion disks have been studied by local three-dimensional magnetohydrodynamic (MHD) simulations. In high-β disks (β = P gas /P mag > 1), the PI has only minor effects on the saturation level of BHI. In low β disks (β ≤ 1), the disk stays in a low-β state because magnetic flux cannot escape fast enough to convert the disk into a high-β state. We found that even in low-β disk the BHI generates fluctuating magnetic fields. The effective magnetic viscosity α B(= –⟨B r B Φ /4π P 0 ⟩) is O(0.1) when β ~ 1.

Information

Type
Part 15. Poster Papers
Information
International Astronomical Union Colloquium , Volume 163: Accretion Phenomena and Related Outflows , 1997 , pp. 766 - 767
Copyright
Copyright © Astronomical Society of the Pacific 1997

References

Brandenburg, et al. 1995, ApJ, 446, 741 CrossRefGoogle Scholar
Hawley, J.F., Gammie, C.F., & Balbus, S.A. 1995, ApJ, 440, 742 Google Scholar
Parker, E.N. 1966, ApJ, 145, 811 CrossRefGoogle Scholar
Matsumoto, R., Horiuchi, T., Shibata, K., & Hanawa, T. 1988 PASJ, 40, 171 Google Scholar
Matsumoto, R., & Tajima, T. 1995, ApJ, 445, 767 CrossRefGoogle Scholar
Shibata, K., Tajima, T., & Matsumoto, R. 1990, ApJ, 350, 295 Google Scholar
Stone, et al. 1996, ApJ, 463, 656 Google Scholar