Beuther, H.Zhang, QizhouGreenhill, LincolnReid, MarkWilner, DavidKeto, EricMarrone, D.Ho, P. T. P.Moran, JamesRao, R.Shinnaga, H.Liu, S.-Y.2017-04-072004Beuther, H., Q. Zhang, L. J. Greenhill, M. J. Reid, D. Wilner, E. Keto, D. Marrone, et al. 2004. “Subarcsecond Submillimeter Continuum Observations of Orion KL.” The Astrophysical Journal 616 (1) (October 28): L31–L34. doi:10.1086/423670.0004-637Xhttp://nrs.harvard.edu/urn-3:HUL.InstRepos:32094225We present the first 865 µm continuum image with sub-arcsecond resolution obtained with the Submillimeter Array. These data resolve the Orion-KL region into the hot core, the nearby radio source I, the sub-mm counterpart to the infrared source n (radio source L), and new sub-mm continuum sources. The radio to submillimeter emission from source I may be modeled as either the result of proton-electron free-free emission that is optically thick to ∼ 100 GHz plus dust emission that accounts for the majority of the submillimeter flux, or H− free-free emission that gives rise to a power-law spectrum with power-law index of ∼ 1.6. The latter model would indicate similar physical conditions as found in the inner circumstellar environment of Mira variable stars. Future sub-arcsecond observations at shorter sub-mm wavelengths should easily discriminate between these two possibilities. The sub-mm continuum emission toward source n can be interpreted in the framework of emission from an accretion disk.en-USechniques: interferometricstars: early typestars: formationISM: individual (Orion-KL)ISM: dust, extinctionsubmillimeterJournal Article2017-02-2820042017-04-0710.2172/827013