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Magnetically Driven Jets from Accretion Disks: Comparison Between 2.5D Nonsteady Simulations and 1.5D Nonsteady/Steady Solutions

Published online by Cambridge University Press:  12 April 2016

T. Kudoh ,
R. Matsumoto  and
K. Shibata
T. Kudoh
Affiliation:
National Astronomical Observatory of Japan, 2–21–1, Osawa, Mitaka, Tokyo, 181, Japan
R. Matsumoto
Affiliation:
Department of Physics, Faculty of Science, Chiba University, Inageku, Chiba 263, Japan
K. Shibata
Affiliation:
National Astronomical Observatory of Japan, 2–21–1, Osawa, Mitaka, Tokyo, 181, Japan

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We have performed 1D(1.5D) and 2D(2.5D) nonsteady MHD numerical simulations of astrophysical jets which are magnetically driven from Keplerian disks, in order to clarify the origin and structure of jets ejected from protostars and active galactic nuclei. The initial and boundary conditions are similar to those of 2D(2.5D) nonsteady MHD simulations of Shibata and Uchida (1986) and Matsumoto et al. (1996); there is initially a Keplerian disk with a nonrotating corona outside, both of which are penetrated by vertical magnetic fields. The subsequent interaction between the disk/corona and the vertical fields are studied as an initial value problem. Against the current belief that this kind of simulations show simply a transient jet caused by nonsteady interaction between the disk/corona and the magnetic field, we have found that the jets ejected from the disk in this way have the same properties of the steady magnetically driven jets that were investigated by using ID steady wind solution (Kudoh & Shibata 1995), even if the jets are not exactly in steady state.

Type
Part 15. Poster Papers
Information
International Astronomical Union Colloquium , Volume 163: Accretion Phenomena and Related Outflows , 1997 , pp. 753
Copyright
Copyright © Astronomical Society of the Pacific 1997

References

Kudoh, T., & Shibata, K. 1995, ApJ, 452, L41 Google Scholar
Kudoh, T., & Shibata, K. 1996, submitted to ApJGoogle Scholar
Matsumoto, R. et al. 1996, ApJ, 461, 115 Google Scholar
Shibata, K., & Uchida, Y. 1986, PASJ, 38, 631 Google Scholar