Portal de Periódicos da CAPES

Jupiter, as observed at short radio wavelengths

1965; The National Institute of Standards and Technology; Volume: 69D; Issue: 12 Linguagem: Inglês

10.6028/jres.069d.165

2376-5771

Jason A. Roberts,

Scientific Research and Discoveries

The history of our knowledge of the microwave emission from Jupiter is reviewed brie fly , hi gh• lighting only what appear to the reviewer to be the significant advances.The Van Allen belt emisSion has a constant flux density, and polarization from 200 Mc/s to 3000 Mc/s, but probably d ecrea ses at frequencies above 3000 Mc/s.The radiation from the di s k co rre s ponds to near inf~ared temperatures at wavelengths of a few centimeters, but may increase at longe r wave le ngths, reachll1g tWi ce this valu e at 10 cm.Th e ro c king of the plane of polarization and the beaming of the radiation are di sc ussed.The present sta te of knowle dge is reac hed with the presentation of a pre limina~y map by Berge showlI1g th e distribution of brightness over th e radio so urce, and a co mparI so n of thi s map With preliminary mode l calc ulation s by Ortwein, C ha ng, a nd Davi s.This co mpari so n s hows that th ere are two Van Allen belts having very different e lec tron pitch a ngle distributions.