INTERFEROMETRIC OBSERVATIONS FOR OXYGEN-CONTAINING ORGANIC-MOLECULES TOWARD ORION-KL

High spatial resolution observations (approximately 5'') were made for the 3 mm transitions of methanol (CH,OH), methyl formate (HCOOCH3), and dimethyl ether [(CH3)2O] toward Orion-KL using the Nobeyama Millimeter Array. The 15(3)-14(4) A- CH3OH emission appears to be elongated along the line connecting IRc2 and ''the southern condensation (SC)'', which may suggest a relation between methanol and the outflow from IRc2. The HCOOCH3 (7(1,6)-6(1.5)) and (CH3)20 (15(2,13)-15(1.14)) emissions appear to be well concentrated toward SC with an angular size of approximately 6.''5 (at the 2 sigma level). There also exists another oxygen-rich condensation to the west of IRc2 (angular size approximately 4.''5) having column densities of HCOOCH, and (CH3)20 comparable to those of SC. We derive the total column densities 6.8 X 10(16) cm-2, 1.4 x 10(16) cm-2 and 2.7 x 10(16) cm-2 for CH3OH, HCOOCH3, and (CH3)2O, respectively, at the core of SC.