Organic Molecules in Low-Mass Protostellar Hot Cores: Submillimeter   Imaging of IRAS 16293-2422
  Arcsecond-resolution spectral observations toward the protobinary system IRAS 16293-2422 at 344 and 354 GHz were conducted using the Submillimeter Array. Complex organic molecules such as CH3OH and HCOOCH3 were detected. Together with the rich organic inventory revealed, it clearly indicates the existence of two, rather than one, compact hot molecular cores (smaller than or equal to 400 AU in radius) associated with each of the protobinary components identified by their dust continuum emission in the inner star-forming core. 
Y.-J. Kuan (1 and 2), H.-C. Huang (1), S. B. Charnley (3), N. Hirano   (2), S. Takakuwa (4), D. J. Wilner (5), S.-Y. Liu (2)...