 |
| Titel |
Turbulence generated by flux tube instabilities in the solar wind |
| VerfasserIn |
Zoltan Voros, Teimuraz Zaqarashvili, Jury Sasunov, Vladimir Semenov, Roberto Bruno |
| Konferenz |
EGU General Assembly 2015
|
| Medientyp |
Artikel
|
| Sprache |
Englisch
|
| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 17 (2015) |
| Datensatznummer |
250103527
|
| Publikation (Nr.) |
 EGU/EGU2015-2941.pdf |
|
|
|
|
|
| Zusammenfassung |
| Magnetic flux tubes represent basic structures on the Sun and in the solar wind.
Flux tubes of solar origin can become magnetically twisted at photospheric,
chromospheric or coronal levels and transported into interplanetary space.
Twisted or untwisted flux tubes can also be generated by magnetic reconnection
in the solar wind. We show here that flux tube instabilities, such as the
Kelvin-Helmholtz and the kink instabilities, may significantly contribute
to the local generation of turbulence, reconnection and dissipation in the
solar wind. The associated "fresh" turbulence may change the field and plasma
conditions supporting different local dissipation mechanisms at their
characteristic wavenumbers. Recent analytical and numerical calculations
show that twisted tubes embedded into twisted external magnetic fields
are Kelvin-Helmholtz unstable even for sub-Alfvenic flows. Moving tubes
with strong twists are unstable against the kink instability resulting in
magnetic reconnection and dissipation.
Vörös et al., ApJL, 797:L10, 2014.
Zaqarashvili et al., A&A, 561, A62, 2014.
Zaqarashvili et al., ApJL, 783:L19, 2014. |
|
|
|
|
|
|