Alfvén instability of steady state flux tubes. Isothermal flow

Allbwn ymchwil: Cyfraniad at gyfnodolynErthygladolygiad gan gymheiriaid

6 Dyfyniadau (Scopus)
121 Wedi eu Llwytho i Lawr (Pure)

Crynodeb

An application of a recently discovered MHD instability to an open magnetic flux tube is investigated. The flux tube is gravitationally stratified and permeated by a smooth subsonic and sub-Alfvenic isothermal flow. The stability of such a tube with respect to small amplitude torsional perturbations generated at the footpoint by random convective motions is analysed. The perturbations are exponentially amplified in time if a narrow region exists where the flux tube rapidly expands. The obtained results may account for the nonthermal broadenings associated with upflows in magnetic regions of the lower solar atmosphere.
Iaith wreiddiolSaesneg
Rhif yr erthyglA68
Nifer y tudalennau9
CyfnodolynAstronomy and Astrophysics
Cyfrol533
Dynodwyr Gwrthrych Digidol (DOIs)
StatwsCyhoeddwyd - 29 Awst 2011

Ôl bys

Gweld gwybodaeth am bynciau ymchwil 'Alfvén instability of steady state flux tubes. Isothermal flow'. Gyda’i gilydd, maen nhw’n ffurfio ôl bys unigryw.

Dyfynnu hyn