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Herschel observations of EXtra-Ordinary Sources: The Terahertz spectrum of Orion KL seen at high spectral resolution

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arxiv 1007.4564 v1 pith:62NNABEH submitted 2010-07-26 astro-ph.SR

Herschel observations of EXtra-Ordinary Sources: The Terahertz spectrum of Orion KL seen at high spectral resolution

N. R. Crockett , E. A. Bergin , S. Wang , D. C. Lis , T. A. Bell , G. A. Blake , A. Boogert , B. Bumble
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S. Cabrit E. Caux C. Ceccarelli J. Cernicharo C. Comito F. Daniel M.-L. Dubernet M. Emprechtinger P. Encrenaz E. Falgarone M. Gerin T. F. Giesen J. R. Goicoechea P. F. Goldsmith H. Gupta R. Gusten P. Hartogh F. Helmich E. Herbst N. Honingh C. Joblin D. Johnstone A. Karpov J. H. Kawamura J. Kooi J.-M. Krieg W. D. Langer W.D. Latter S. D. Lord S. Maret P. G. Martin G. J. Melnick K. M. Menten P. Morris H. S. P. Muller J. A. Murphy D. A. Neufeld V. Ossenkopf J. C. Pearson M. Perault T. G. Phillips R. Plume S.-L. Qin P. Roelfsema R. Schieder P. Schilke S. Schlemmer J. Stutzki F. F. S. van der Tak A. Tielens N. Trappe C. Vastel H. W. Yorke S. Yu J. Zmuidzinas
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We present the first high spectral resolution observations of Orion KL in the frequency ranges 1573.4 - 1702.8 GHz (band 6b) and 1788.4 - 1906.8 GHz (band 7b) obtained using the HIFI instrument on board the Herschel Space Observatory. We characterize the main emission lines found in the spectrum, which primarily arise from a range of components associated with Orion KL including the hot core, but also see widespread emission from components associated with molecular outflows traced by H2O, SO2, and OH. We find that the density of observed emission lines is significantly diminished in these bands compared to lower frequency Herschel/HIFI bands.

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