Maps of Jovian radio emission at 1412 MHz

Details Maps of Jovian radio emission at 1412 MHz Maps of Jovian radio emission at 1412 MHz

Oct 1978

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978lunl.rept.....p&link_type=abstract

Final Technical Report, 15 Jan. - 15 Oct. 1978 Leiden Univ. (Netherlands).

Astronomy and Astrophysics

Astronomy

Jupiter (Planet), Maps, Radio Emission, Interferometry, Radio Astronomy, Radio Sources (Astronomy), Stokes Theorem (Vector Calculus)

Scientific paper

Jupiter was observed with the Westerbork Radio Telescope at a frequency of 1412 MHz in December 1977 when it was at its most northerly opposition to the earth. Pictures were obtained of Jupiter in all four Stokes parameters at 24 different rotational aspects of the planet, each integrated over 15 degrees of Jovian rotation. The maps clearly indicate the presence of higher order terms in the dipolar field of Jupiter at distances of approximately 2 Rj from the center. They also show a displacement of the main dipole of 0.119 plus or minus 0.009 Rj from the center of the disk towards longitude 135-145 degree and a displacement of 0.04 plus or minus 0.04 Rj towards the north in agreement with the displacement found by the Pioneer spacecraft. From the data it is estimated that the thermal disk temperature at this frequency is more than 300 K but less than 340 K, which implies an ammonia mixing ratio of approximately 0.0005.

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