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Cylindrically-Collimated, Self-Similar MHD Disk Outflows

Published online by Cambridge University Press:  12 April 2016

Eve C. Ostriker
Eve C. Ostriker*
Affiliation:
Harvard-Smithsonian Center for Astrophysics, Cambridge, MA, USA
*
1present address: Department of Astronomy, The University of Maryland, College Park, MD 20742–2421, USA

Abstract

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We describe the dynamics of a class of MHD winds from Keplerian-rotating disks. In this model, all flow velocities are assumed to vary self-similarly with spherical radius r as υ(r, θ) ∝ r−1/2, with density varying as ρ(r, θ) ∝ r−q for arbitrary q. At large distances from the disk, the wind is explicitly required to become cylindrically collimated. We find that the asymptotic wind solution has power-law scalings of all flow variables in the cylindrical radius R = r sin θ, and q < 1 is necessary. We describe how the Alfvén criticality condition limits the space of energy and angular momentum parameters defining these wind solutions. We present an example of the run of density, velocity, and magnetic field for a full solution of the wind equations, and compare the properties of these cylindrically-collimated wind solutions to previous work.

Type
Part 10. Accretion Disks and Outflows
Information
International Astronomical Union Colloquium , Volume 163: Accretion Phenomena and Related Outflows , 1997 , pp. 439 - 442
Copyright
Copyright © Astronomical Society of the Pacific 1997

References

Bachiller, R. & Gomez-Gonzalez, J. 1992 Astronomy and Astrophysics Review, 3, 257 CrossRefGoogle Scholar
Blandford, R.D. & Payne, D.G. 1982, MNRAS, 199, 883 Google Scholar
Contopoulos, J. & Lovelace, R.V.E. 1994, ApJ 429, 139 CrossRefGoogle Scholar
Ferreira, J. 1996, A&A, in pressGoogle Scholar
Heyvaerts, J. & Norman, C.A. 1989, ApJ, 347, 1055 Google Scholar
Königl, A., & Ruden, S.P. 1993, in Protostars and Planets III, eds. Levy, E.H. and Lunine, J.I., Tucson: U. Arizona Press, 641 Google Scholar
Lada, C.J. & Fich, M. 1996, ApJ, 459, 638 Google Scholar
Ray, T.P., Mundt, R., Dyson, J.E., Falle, S.A.E.G., & Raga, A.C. 1996, ApJ, 468, L103 Google Scholar