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Abstract

We investigate outflows from the disk-magnetosphere boundary of rotating magnetized stars in cases where the magnetic field of a star is bunched into an X-type configuration using axisymmetric and full 3D MHD simulations. Such configuration appears if viscosity in the disk is larger than diffusivity, or if the accretion rate in the disk is enhanced. Conical outflows flow from the inner edge of the disk to a narrow shell with an opening angle 30-45 degrees. Outflows carry 0.1-0.3 of the disk mass and part of the disk's angular momentum outward. Conical outflows appear around stars of different periods, however in case of stars in the "propeller" regime, an additional - much faster component appears: an axial jet, where matter is accelerated up to very high velocities at small distances from the star by magnetic pressure force above the surface of the star. Exploratory 3D simulations show that conical outflows are symmetric about rotational axis of the disk even if magnetic dipole is significantly misaligned. Conical outflows and axial jets may appear in different types of young stars including Class I young stars, classical T Tauri stars, and EXors.

Details

1009240
Title
Disk-Magnetosphere Interaction and Outflows: Conical Winds and Axial Jets
Publication title
arXiv.org; Ithaca
Publication year
2009
Publication date
Jan 24, 2009
Section
Astrophysics
Publisher
Cornell University Library, arXiv.org
Source
arXiv.org
Place of publication
Ithaca
Country of publication
United States
University/institution
Cornell University Library arXiv.org
e-ISSN
2331-8422
Source type
Working Paper
Language of publication
English
Document type
Working Paper
Publication history
 
 
Online publication date
2015-05-13
Milestone dates
2009-01-24 (Submission v1)
Publication history
 
 
   First posting date
13 May 2015
ProQuest document ID
2081131094
Document URL
https://www.proquest.com/working-papers/disk-magnetosphere-interaction-outflows-conical/docview/2081131094/se-2?accountid=208611
Full text outside of ProQuest
Copyright
© 2009. This work is published under http://arxiv.org/licenses/nonexclusive-distrib/1.0/ (the “License”). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.
Last updated
2019-04-13
Database
2 databases
  • ProQuest One Academic
  • ProQuest One Academic