Polarization of Jovian DAM emission as inferred from active longitude model

Patrick H. M. Galopeau 1 M. Y. Boudjada 2
1 HEPPI - LATMOS
LATMOS - Laboratoire Atmosphères, Milieux, Observations Spatiales
Abstract : Long-term observations of Jupiter's decametric (DAM) radiation have shown that a large part of emission is modulated by two dominant factors: the planetary rotation and the orbital phase of Io. The first one indicates that the occurrence probability of the radiation depends on the observer's longitude, while the second factor points to a control of part of the radio emission by Io. Spectropolarimeter measurements showed that the radiation emitted from the northern and southern hemispheres are right-hand and left-hand circular polarized, respectively. Here we compare the Jovian decametric polarization observations to those derived from the active longitude model proposed by Galopeau et al. (JGR, 109, 2004). This model gives evidence of the presence of a longitude range in the northern and southern hemispheres favoring the radio decametric emission and leading to a higher occurrence probability. We discuss the common polarization features between the model and the observations, and we show that the behaviors of the southern and northern sources are not alike despite a same generation mechanism.
Complete list of metadatas

https://hal.archives-ouvertes.fr/hal-00710653
Contributor : Catherine Cardon <>
Submitted on : Thursday, June 21, 2012 - 1:55:57 PM
Last modification on : Wednesday, May 15, 2019 - 4:12:10 AM

Identifiers

Citation

Patrick H. M. Galopeau, M. Y. Boudjada. Polarization of Jovian DAM emission as inferred from active longitude model. EGU General Assembly 2012, 2012, Vienna, Austria. ⟨hal-00710653⟩

Share

Metrics

Record views

172