Skip to Main content Skip to Navigation
Journal articles

The magnetorotational instability as a jet launching mechanism

Abstract : Magnetorotational turbulence and magnetically driven disc winds are often considered as separate processes. However, realistic astrophysical discs are expected to be subject to both effects, although possibly at different times and locations. We investigate here the potential link between these two phenomena using a mixed numerical and analytical approach. We show in particular that large-scale magnetorotational instability modes which dominate strongly magnetised discs (plasma β ~ 10) naturally produce magnetically driven outflows in the nonlinear regime. We show that these outflows share many similarities with local and global disc wind solutions found in the literature. We also investigate the 3D stability of these outflows and show that they are unstable on dynamical timescales. The implications of these results for the transition between a jet-emitting disc and a standard "viscous" disc are discussed.
Complete list of metadata

https://hal-insu.archives-ouvertes.fr/insu-03617522
Contributor : Nathalie POTHIER Connect in order to contact the contributor
Submitted on : Thursday, March 24, 2022 - 9:41:19 AM
Last modification on : Thursday, March 24, 2022 - 9:41:20 AM
Long-term archiving on: : Saturday, June 25, 2022 - 6:29:00 PM

File

aa20395-12.pdf
Publisher files allowed on an open archive

Licence


Distributed under a Creative Commons Attribution 4.0 International License

Identifiers

Collections

Citation

G. Lesur, J. Ferreira, G. I. Ogilvie. The magnetorotational instability as a jet launching mechanism. Astronomy and Astrophysics - A&A, EDP Sciences, 2013, 550, ⟨10.1051/0004-6361/201220395⟩. ⟨insu-03617522⟩

Share

Metrics

Record views

17

Files downloads

3