Possibility of detecting magnetospheric radio bursts from Uranus and Neptune

Details Possibility of detecting magnetospheric radio bursts from Uranus and Neptune Possibility of detecting magnetospheric radio bursts from Uranus and Neptune

May 1976

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976natur.261..299k&link_type=abstract

Nature, vol. 261, May 27, 1976, p. 299-301. NASA-Navy-supported research.

Astronomy and Astrophysics

Astronomy

5

Magnetospheric Instability, Neptune (Planet), Planetary Magnetospheres, Radio Bursts, Uranus (Planet), Frequency Response, Planetary Atmospheres, Power Spectra, Solar Wind

Scientific paper

The intensity of magnetospheric radio bursts (MRBs) is scaled to solar-wind input into planetary magnetospheres and the frequency of emission is scaled to polar surface magnetic-field strength in order to estimate the possibility of detecting MRBs from Uranus and Neptune. A scaling law is derived which relates the ratio of power radiated in MRBs to the solar-wind input for earth, Jupiter, and Saturn. Power-flux spectra of MRBs from these three planets are plotted, and it is shown that Jupiter and Saturn may radiate 1% to 5% of the solar-wind energy input into their magnetospheres. The properties of MRBs from Uranus and Neptune are estimated by assuming a conversion efficiency of 1% to 5%, a bandwidth of half the peak frequency, and conformity of Uranus' and Neptune's dipole moments with the magnetic Bode's law. Based on the results, it is suggested that detection of MRBs from these two planets may be a reasonable cruise-mode radio-astronomy objective on future missions to the outer solar system.

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