Verlag der Österreichischen Akademie der Wissenschaften

Abstract:
S-component of the sporadic radio emission of Jupiter decameter emission (DAM) is an extraordinary astrophysical phenomenon which is formed as the result of a unique interaction between the Jupiter and its Io satellite and this phenomenon is characterized by an unusual complexity of the frequency-temporal structure on the dynamic spectra. The Jovian S-burst emission appears during the decameter radio storms which can be predicted on the basis of the analysis of the geometric configuration between the Earth, the Jupiter and Io. Monitoring of the Io-dependent DAM emission revealed the characteristic Jupiter emission zones known as Io-A, Io-B, Io- C, and Io-D. It should be noted that despite of more than 50 years of extensive exploration of the Jovian DAM radiation the physical nature of this phenomenon remains insufficiently clear. On the other hand, many problems in the theory of the Jovian decameter emission have been successfully investigated and solved [Litvinenko et al., 2004; Zaitsev et al., 2006; Ladreiter et al., 1995; Shaposhnikov et al., 1997, 2011]. Nevertheless, there is reason to believe that not all issues concerning the physical nature of this unique phenomenon have been definitively resolved. One of the perspective approaches for finding new results is experimental investigation at a higher quality and quantity level followed by a detailed data analysis using both well known and modern mathematical methods. Development of the receiving equipment (improvement of the following characteristics: the temporal-frequency resolution, sensitivity, signal-to-noise ratio, etc.) allows to analyze the specific Sburst features from the microscopic to macroscopic scale [Litvinenko et al., 2009]. With this aim several observational campaigns were performed in November 2009 using the UTR-2 radio telescope (Kharkov, Ukraine) and effective registration systems possessing high frequency and temporal resolutions (antenna effective area is close to 100,000 m2, the frequency resolution is 4 kHz, the temporal resolution is 0.25 ms, the dynamic range is 70 dB) [Konovalenko et al., 2001]. The main goal of these campaigns was an experimental investigation of the Jovian decameter radio emission with an attempt to find out and analyse the phenomena which can be detected using the above mentioned equipment.