Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011agufmsm12b..03h&link_type=abstract
American Geophysical Union, Fall Meeting 2011, abstract #SM12B-03
Astronomy and Astrophysics
Astronomy
[2732] Magnetospheric Physics / Magnetosphere Interactions With Satellites And Rings, [5744] Planetary Sciences: Fluid Planets / Orbital And Rotational Dynamics, [6954] Radio Science / Radio Astronomy
Scientific paper
Using 50 years of continuous seasonal observations of Jupiter's decametric radio emissions from 18-22 MHz collected at the University of Florida Radio Observatory (UFRO), we calculate a new radio rotation period of Jupiter. The new period is the weighted mean of more than 20 independent measurements. Each measurement is found by determining the drift of the histograms of probability of occurrence versus the System III (1965) central meridian longitude (CML) over intervals of approximately 12, 24, 36, and 48 years. This multiple 12-year average technique is employed to reduce the uncertainty in the longitudes of the radio sources caused by Jupiter's 11.86 year orbit. Our weighted mean is 9 h 55 m 29.689 s, with a standard deviation of the weighted mean of 0.004 s. Our calculations show remarkably stable radio sources. An upper limit of any radio rotation period drift is discussed.
Higgins Charles A.
Reyes Francisco
Solus D.
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