The structure of helical interplanetary magnetic fields

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dc.contributor.authorGoldstein, Melvyn
dc.contributor.authorRoberts, D. A.
dc.contributor.authorFitch, C. A.
dc.date.accessioned2023-11-07T19:10:52Z
dc.date.available2023-11-07T19:10:52Z
dc.date.issued1991-08
dc.description.abstractThe interplanetary magnetic field is known to be highly helical. Although the detailed spatial structure of the fields has yet to be elucidated, the helicity spectrum has been conjectured to result from a random walk in direction of a constant magnitude magnetic field vector. We demonstrate that a model using three-dimensional fluctuations with variations in |B| gives a good fit to the helicity spectrum as well as to other properties of the interplanetary magnetic field.en
dc.description.sponsorships. This work was supported by the Space Physics Theory Program and another research grant at the Goddard Space Flight Center. MLG would like to acknowledge W. H. Matthaeus (WHM) and J. R. Jokipii (JRJ) for conversations which led to a major revision of the first version of this letter. The algorithm for numerically constructing the model magnetic fields was originally de- veloped by JRJ and was revised in 1980 by WHM and MLG to study the role of helicity in particle transport. It was refined in 1990 by JRJ, MLG, and DAR before being further revised for the work reported here. We are particu- larly indebted to JRJ for his continued interest in this work. We also wish to acknowledge N. F. Ness for making avail- able to us the Voyager magnetometer data.en
dc.description.urihttps://agupubs.onlinelibrary.wiley.com/doi/abs/10.1029/91GL01608en
dc.format.extent4 pagesen
dc.genrejournal articlesen
dc.identifierdoi:10.13016/m2lcdm-axec
dc.identifier.citationGoldstein, M. L., D. A. Roberts, and C. A. Fitch. “The Structure of Helical Interplanetary Magnetic Fields.” Geophysical Research Letters 18, no. 8 (1991): 1505–8. https://doi.org/10.1029/91GL01608.en
dc.identifier.urihttps://doi.org/10.1029/91GL01608
dc.identifier.urihttp://hdl.handle.net/11603/30562
dc.language.isoenen
dc.publisherAGUen
dc.relation.isAvailableAtThe University of Maryland, Baltimore County (UMBC)
dc.relation.ispartofUMBC Goddard Planetary Heliophysics Institute (GPHI)
dc.rightsPublic Domain Mark 1.0*
dc.rightsThis work was written as part of one of the author's official duties as an Employee of the United States Government and is therefore a work of the United States Government. In accordance with 17 U.S.C. 105, no copyright protection is available for such works under U.S. Law.en
dc.rights.urihttp://creativecommons.org/publicdomain/mark/1.0/*
dc.titleThe structure of helical interplanetary magnetic fieldsen
dc.typeTexten
dcterms.creatorhttps://orcid.org/0000-0002-5317-988Xen

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