Collimation of a Central Wind by a Disk-Associated Magnetic Field
arXiv:astro-ph/0212291 · doi:10.1046/j.1365-8711.2003.06977.x
Abstract
We present the results of time-dependent, numerical magnetohydrodynamic simulations of a realistic young stellar object outflow model with the addition of a disk-associated magnetic field. The outflow produced by the magnetic star-disk interaction consists of an episodic jet plus a wide-angle wind with an outflow speed comparable to that of the jet (100--200 km/s). An initially vertical field of << 0.1 Gauss, embedded in the disk, has little effect on the wind launching mechanism, but we show that it collimates the entire flow (jet + wide wind) at large (several AU) distances. The collimation does not depend on the polarity of the vertical field. We also discuss the possible origin of the disk-associated field.
4 pgs, 2 figs; to appear in Jets 2002: Theory & Observations, Proceedings of the September 2002 JENAM meeting in Porto, Portugal
References in corpus (13)
- X-Ray Flares and Mass Outflows Driven by Magnetic Interaction between a Protostar and its Surrounding Disk
- Spin-Up/Spin-Down of Magnetized Stars with Accretion Disks and Outflows
- HST/STIS spectroscopy of the optical outflow from DG Tau: structure and kinematics on sub-arcsecond scales
- Magneto-centrifugally driven winds: comparison of MHD simulations with theory
- Disk Formation by AGB Winds in Dipole Magnetic Fields
- Simulation-Based Investigation of a Model for the Interaction Between Stellar Magnetospheres and Circumstellar Accretion Disks
- Interaction of Infall and Winds in Young Stellar Objects
- Hydrodynamical Models of Outflow Collimation in YSOs
- Outflow collimation in young stellar objects
- A Global Jet/Circulation Model for Young Stars
- Jet Collimation by Small-Scale Magnetic Fields
- Stellar Outflows Driven by Magnetized Wide-Angle Winds
- The Enigmatic HH 255
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- X-ray Emission from Orion Nebula Cluster Stars with Circumstellar Disks and Jets
- An Episodic Wide-angle Outflow in HH 46/47
- Magnetic launching and collimation of jets from the disk-magnetosphere boundary: 2.5D MHD simulations
- Nonradial and nonpolytropic astrophysical outflows VI. Overpressured winds and jets
- Laboratory disruption of scaled astrophysical outflows by a misaligned magnetic field
- First large scale Herbig-Haro jet driven by a proto-brown dwarf
- Nonradial and nonpolytropic astrophysical outflows IX. Modeling T Tauri jets with a low mass-accretion rate
- The Nature of Stellar Winds in the Star-Disk Interaction
- Velocity asymmetries in YSO jets: Intrinsic and extrinsic mechanisms