Submillimeter Array 440$\mu$m/690GHz line and continuum observations of Orion-KL

Abstract

Submillimeter Array observations of Orion-KL at 1'' resolution in the 440mu/690GHz band reveal new insights about the continuum and line emission of the region. The 440mu continuum flux density measurement from source I allows us to differentiate among the various proposed physical models: Source I can be well modeled by a ``normal'' protostellar SED consisting of a proton-electron free-free emission component at low frequencies and a strong dust component in the submillimeter bands. Furthermore, we find that the protostellar object SMA1 is clearly distinct from the hot core. The non-detection of SMA1 at cm and infrared wavelengths suggests that it may be one of the youngest sources in the entire Orion-KL region. The molecular line maps show emission mainly from the sources I, SMA1 and the hot core peak position. An analysis of the CH$3CN(37_K-36_K) K-ladder (K=0...3) indicates a warm gas component of the order 600+-200K. In addition, we detect a large fraction (~58%) of unidentified lines and discuss the difficulties of line identifications at these frequencies.

arXiv comment13 pages, 8 figures, accepted for ApJ, sched. v.636 January 2006, higher resolution version available at http://www.mpia-hd.mpg.de/homes/beuther

References in corpus (9)

• The Submillimeter Array
• Submm line imaging of Orion-KL with the Submillimeter Array
• Submillimeter Observations of Titan: Global Measures of Stratospheric Temperature, CO, HCN, HC3N, and the Isotopic Ratios 12C/13C and 14N/15N
• A new mid-infrared map of the BN/KL region using the Keck telescope
• Sub-arcsecond sub-mm continuum observations of Orion-KL
• High Angular Resolution Mid-infrared Imaging of Young Stars in Orion BN/KL
• A Spectral Line Survey of Selected 3 mm Bands Toward Sagittarius B2(N-LMH) Using the NRAO 12 Meter Radio Telescope and the BIMA Array I. The Observational Data
• CO on Titan: More Evidence for a Well-Mixed Vertical Profile
• On the heating of source of the Orion KL hot core

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