A Torsional Alfvén Wave Embedded Within a Small Magnetic Flux Rope in the Solar Wind

Details A Torsional Alfvén Wave Embedded Within a Small Magnetic Flux Rope in the Solar Wind A Torsional Alfvén Wave Embedded Within a Small Magnetic Flux Rope in the Solar Wind

Aug 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010apj...719l..36g&link_type=abstract

The Astrophysical Journal Letters, Volume 719, Issue 1, pp. L36-L40 (2010).

Astronomy and Astrophysics

Astronomy

7

Magnetic Fields, Plasmas, Solar Wind, Sun: Heliosphere, Waves

Scientific paper

We describe and use novel techniques to analyze a striking and distinct solar wind event observed by two spacecraft. We show that the event is consistent with an interpretation as a torsional Alfvén wave embedded within a small, nearly radially aligned, magnetic flux rope of total width ~106 km. It seems likely that the torsional wave was generated by distortions produced within a pre-existing flux rope that erupted from the Sun. Our examination of many events previously identified as flux ropes in the solar wind indicates that torsional Alfvén waves are extremely rare in such events.

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