Morphology of the Jupiter Io-D decametric radio source
Abstract
Observations of Jupiter's Io-D decametric radio emissions have been made with the Long Wavelength Array Station 1 (LWA1) from 2012-2015. The LWA1 data show new characteristics in dynamic spectra of Jupiter Io-D emission, including a double-envelope structure filled with spectral arc features, persistent narrow-band events, and ubiquitous modulation lanes and S-bursts. We observe an Io-D peak frequency of 26.5 MHz implying a lower limit of 9.3 Gauss for the southern hemisphere magnetic field magnitude. We estimate a Jovian longitude of 235 deg. for the center location of the Io-D peak frequency source. Many S-burst drift rates were measured as a function of frequency and were found to be consistent with other Io-related sources. The Io-D source occurrence boundaries require new limits: CML = 0°-287° and Phi_{Io}=50°-135°.
- Publication:
-
Planetary Radio Emissions VIII
- Pub Date:
- 2017
- DOI:
- 10.1553/PRE8s77
- Bibcode:
- 2017pre8.conf...77H
- Keywords:
-
- Planetary radio emissions;
- Jupiter (Planet);
- DAM;
- Io-D;
- ground-based observations;
- LWA