Astronomy and Astrophysics – Astrophysics
Scientific paper
Mar 2009
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009a%26a...496..269a&link_type=abstract
Astronomy and Astrophysics, Volume 496, Issue 1, 2009, pp.269-274
Astronomy and Astrophysics
Astrophysics
4
Planets And Satellites: Individual: Jupiter, Magnetohydrodynamics (Mhd), Waves, Plasmas, Radiation Mechanisms: Non-Thermal
Scientific paper
Short (S-) bursts of Jovian decametric emission show random behavior with very complicated forms in the dynamic spectrum. We first draw attention to the correlation properties of S-bursts as an indicator of their hidden regularity. Thus we calculate the linear correlation coefficient r(f-fo, Δ t) between the spectral intensity in the current (f) and the reference (fo) frequency channels with Δ t time shift. The result is displayed in the form of 2D-correlation image, where the pixel brightness reflects the r estimate, and the pixel's co-ordinates are f and Δ t. The non-trivial and stabile correlation patterns are found, described, and discussed here. Apparently, there is the hidden wave-like modulation of the whole S-burst storm in the form of a correlation or anti-correlation between emissions at different radio frequencies with short time scales from 0.02 s to 0.8 s.
Arkhypov Oleksiy V.
Rucker Helmet O.
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