A far-infrared molecular and atomic line survey of the Orion KL region

Abstract

We have carried out a high spectral resolution line survey towards the Orion Kleinmann-Low (KL) cluster from 44-188 um. The observations were taken with the Long Wavelength Spectrometer (LWS) in Fabry-Perot mode, on board the Infrared Space Observatory (ISO). A total of 152 lines are clearly detected and a further 34 features are present as possible detections. The spectrum is dominated by the molecular species H2O, OH and CO, along with [OI] and [CII] lines from PDR or shocked gas and [OIII], [NIII] lines from the foreground M42 HII region. Several isotopic species, as well as NH3, are also detected. HDO and H3O+ are tentatively detected for the first time in the far-infrared range towards Orion-KL. A basic analysis of the line observations is carried out, by comparing with previous measurements and published models and deriving rotational temperatures and column densities in the case of the molecular species. The complexity of the region requires more sophisticated models for the interpretation of all the line observations.

arXiv commentAccepted by MNRAS 2006 April 28

References in corpus (7)

• Thermal Water Vapor Emission from Shocked Regions in Orion
• A spectral survey of the Star Forming Core of the Orion Nebula from 455 -- 507 GHz
• Constraints on the Formation and Evolution of Circumstellar Disks in Rotating Magnetized Cloud Cores
• OH maser disc and outflow in the Orion-BN/KL region
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Cited by in corpus (31)

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• Spatial variation of the cooling lines in the Orion Bar from Herschel/PACS
• A Spitzer Space Telescope far-infrared spectral atlas of compact sources in the Magellanic Clouds. II. The Small Magellanic Cloud
• Deuterated molecules in Orion KL from Herschel/HIFI
• The JCMT Legacy Survey of the Gould Belt: mapping 13CO and C18O in Orion A
• Herschel Far-Infrared Spectral-mapping of Orion BN/KL Outflows: Spatial distribution of excited CO, H2O, OH, O and C+ in shocked gas
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• Herschel observations of extra-ordinary sources: Detection of Hydrogen Fluoride in absorption towards Orion~KL
• Herschel observations of Extra-Ordinary Sources: H2S as a Probe of Dense Gas and Possibly Hidden Luminosity Toward the Orion KL Hot Core
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• Dust, Ice and Gas in Time (DIGIT) Herschel program first results: A full PACS-SED scan of the gas line emission in protostar DK Cha
• SWAS Observations of Water in Molecular Outflows
• The ISO LWS high resolution spectral survey towards Sagittarius B2
• A 1.3 cm Line Survey toward Orion KL
• Herschel observations of EXtra-Ordinary Sources (HEXOS): Observations of H2O and its isotopologues towards Orion KL
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• The Water Vapor Abundance in Orion KL Outflows
• Herschel observations of EXtra-Ordinary Sources: The Terahertz spectrum of Orion KL seen at high spectral resolution
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• The GBT 67 -- 93.6 GHz Spectral Line Survey of Orion-KL
• First Detection of Radio Recombination Lines of Ions Heavier than Helium
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• The far-IR view of Sgr B2 and Orion KL