TYPE Ⅲ BURST SOURCES IN THE CORONA AND COMPARISONS WITH THE INTERPLANETARY MAGNETIC FIELD LINES

In thes paper, some high spacial and temperal resulation data observed with the Nancay Mark Ⅲ Radio heliograph in the period of 1980 March-1981 September are processed. It is found that a great number of Type Ⅲ burst sources in the corona are centralized near the ecliptic. Type Ⅲ burst sonrces located in the north of the ecliptic are larger in number than those in the south; the west are larger in number than the east. For 92.0% Type Ⅲ burst sonrces are located within 40°of the ecliptic. After a comparison with the interplanetary magnetic field lines obtained with the radio spectrograph on board ISEE-3 in the same period, it is discovered that there are clear corresponding relations on latitude distribution between Type Ⅲ burst sonrces in the corona and the interplanetary magnetic field lines. It is evidene that the interplanetary Type Ⅲ burst sources originate from Type Ⅲ burst sources in the corona.