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Title: | Relationship between discontinuities, magnetic holes, magnetic decreases, and nonlinear Alfvén waves: Ulysses observations over the solar poles |
Authors: | Tsurutani, B.T. Galvan, C. Arballo, J.K. Winterhalter, D. Sakurai, R. Smith, E.J. Buti, B. Lakhina, G.S. Balogh, A. |
Keywords: | Magnetic holes Nonlinear Alfvén waves Magnetic decreases Solar poles Solar corona |
Issue Date: | 2002 |
Citation: | Geophysical Research Letters, v.29/11, p. 23-1–23-4, 2002, doi: 10.1029/2001GL013623 |
Abstract: | [1] Ulysses magnetic field data are used to study magnetic field microstructure over the solar poles. Magnetic holes (MHs) and magnetic decreases (MDs) are found to be located at the phase-steepened edges of nonlinear Alfvén waves. The phase-steepened edges (directional discontinuities) occur in time-coincidence with MHs, one edge of an MD, or throughout the whole MD. These MH- and MD-related discontinuities have both rotational and compressive properties, perhaps explaining why many directional discontinuities detected in interplanetary space have non-MHD properties. The dispersive, dissipative and compressive features of nonlinear Alfvén waves may be important for the heating of the solar corona. |
URI: | http://localhost:8080/xmlui/handle/123456789/269 |
Appears in Collections: | UAS_Reprints |
Files in This Item:
File | Description | Size | Format | |
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Lakhina_GRL_2002.pdf | 348.74 kB | Adobe PDF | View/Open |
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