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The Submillimetre Wavelength Spectrum of Orion A

Published online by Cambridge University Press:  04 August 2017

Glenn J. White ,
Tania Monteiro ,
Ruth Rainey ,
Kevin Richardson ,
Matthew Griffin  and
L. Avery
Glenn J. White
Affiliation:
Queen Mary College, University of London, England
Tania Monteiro
Affiliation:
University of Newcastle-upon-Tyne, England
Ruth Rainey
Affiliation:
Queen Mary College, University of London, England
Kevin Richardson
Affiliation:
Queen Mary College, University of London, England
Matthew Griffin
Affiliation:
Queen Mary College, University of London, England
L. Avery
Affiliation:
National Research Council, Ottawa, Canada

Extract

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We report on the first submillimetre wavelength spectral scan of the Orion A molecular cloud in the frequency range 342-463 GHz (0.88-0.65 mm) using the Queen Mary College Submillimetre Heterodyne Receiver at UKIRT. Twenty-eight molecular transitions were detected, the majority of these for the first time. The lines include transitions of CO, CS, HCN, HCO+, H2CO, H2CS, SO, SO2, CCH, SiO and CH3OH. Upper limits are reported for a number of lines including CO+ and the ground state transition of NH2. A number of the lines are surprisingly intense, and we will present maps of the relative distributions of HCO+, HCN, H2CO and CCH, which show striking differences in their spatial structures. We will present details of the excitation of a number of the lines based on the results from this survey.

Type
I. Star Forming Processes in the Solar Neighborhood
Information
Symposium - International Astronomical Union , Volume 115: Star Forming Regions , 1987 , pp. 153 - 154
Copyright
Copyright © Reidel 1987