A beaming model of the Io-independent Jovian decameter radiation based on multipole models of the Jovian magnetic field

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UMBC Goddard Planetary Heliophysics Institute (GPHI)

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https://orcid.org/0000-0002-5317-988X

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1979-05

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journal articles
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Goldstein, M., A. Eviatar, and J. R. Thieman. “A Beaming Model of the Io-Independent Jovian Decameter Radiation Based on Multipole Models of the Jovian Magnetic Field.” The Astrophysical Journal 229 (May 1, 1979): 1186–97. https://doi.org/10.1086/157053.

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This 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.
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Abstract

A geometrical model is presented in which the apparent source locations of the Io-independent decameter radiation are computed. The calculations assume that the radiation is produced by stably trapped electrons radiating near the local electron gyrofrequency and that the emission is then beamed onto a conical surface. The maximum occurrence probability of noise storms is associated with regions in the Jovian magnetosphere where the axis of the emission cone is most inclined toward the Jovian equatorial plane. The calculations utilize and compare two of the octopole spherical harmonic expansions of the Jovian magnetic field constructed from data accumulated by the fluxgate and vector helium magnetometers on board Pioneer 11.