Astronomy and Astrophysics – Astrophysics – High Energy Astrophysical Phenomena
Scientific paper
2010-01-12
Astronomy and Astrophysics
Astrophysics
High Energy Astrophysical Phenomena
9 pages, 9 figures, to appear on A&A
Scientific paper
Magnetohydrodynamic instabilities can be responsible for the formation of structures with various scales in astrophysical jets. We consider the stability properties of jets containing both the azimuthal and axial field of subthermal strength. A magnetic field with complex topology in jets is suggested by theoretical models and is consistent with recent observations. Stability is discussed by means of a linear analysis of the ideal magnetohydrodynamic equations. We argue that in azimuthal and axial magnetic fields the jet is always unstable to non-axisymmetric perturbations. Stabilization does not occur even if the strengths of these field components are comparable. If the axial field is weaker than the azimuthal one, instability occurs for perturbations with any azimuthal wave number $m$, and the growth rate reaches a saturation value for low values of $m$. If the axial field is stronger than the toroidal one, the instability shows for perturbations with relatively high $m$.
Bonanno Alfio
Urpin Vadim
No associations
LandOfFree
The magnetohydrodynamic instability of current-carrying jets does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with The magnetohydrodynamic instability of current-carrying jets, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The magnetohydrodynamic instability of current-carrying jets will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-460011