Lack of Effect of Io upon Jovian 3.75-cm Emission.

Abstract

view Abstract Citations (3) References Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Lack of Effect of Io upon Jovian 3.75-cm Emission. Dickel, John R. Abstract A recent investigation by Bigg (Nature 203, 1008, 1965) has shown that the recording of decameter wavelength radiation from Jupiter depends not only on the Jovian longitude which faces the earth but also upon the relative position of the satellite lo in its orbit. Since the decameter bursts are probably associated with the magnetic field of the planet, the author decided to see if lo had any effect on the synchrotron emission generated within the radiation belts in Jupiter's magnetosphere. The position of Io was plotted against the results of observations at 3.75 cm, which were taken with a polarimeter on the 85-ft radio telescope at the University of Michigan. The variations observed in flux density, degree of polarization, and position angle of the polarized emission from Jupiter can be attributed to the rotation of the planet; no correlation was detected between the position of lo and the variation of the polarized emission. Therefore, while Io is observed to have an effect upon the localized regions responsible for the decameter bursts, it does not influence the over-all structure of the Jovian magnetosphere, which is responsible for the nonthermal emission at centimeter wavelengths. Publication: The Astronomical Journal Pub Date: 1965 DOI: 10.1086/109596 Bibcode: 1965AJ.....70R.320D full text sources ADS |