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Plateau emission from Orion in the CO J=17−16 Line

Boreiko, R. T. and Betz, A. L. and Zmuidzinas, J. (1990) Plateau emission from Orion in the CO J=17−16 Line. In: Submillimetre Astronomy. Astrophysics and Space Science Library. No.158. Springer Netherlands , Dordrecht, pp. 167-168. ISBN 9789401568524.

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High-resolution spectra of the J=17−16 CO line (1956 GHz) in the BN-KL region of Orion have been obtained with a heterodyne spectrometer. The profiles show a broad component with 30 km s⁻¹ (FWHM) linewidth and a narrower 8 km s⁻¹ component. The broader plateau emission detected over a range of transitions from J=1–0 to J=17−16 is analyzed under the assumptions of thermal equilibrium and optically thin wings to deduce an excitation temperature of 180 ± 50 K and minimum column density of 1 X 10¹⁸ cm⁻² for CO in this component.

Item Type:Book Section
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Additional Information:© Springer Science+Business Media Dordrecht 1990. This work was performed as part of the KAO Airborne Astronomy Program under NASA Grant NAG 2-254.
Funding AgencyGrant Number
Subject Keywords:Line Source, Column Density, Excitation Temperature, Broad Component, Antenna Temperature
Series Name:Astrophysics and Space Science Library
Issue or Number:158
Record Number:CaltechAUTHORS:20201121-170820057
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:106766
Deposited By: Rebecca Minjarez
Deposited On:23 Nov 2020 17:17
Last Modified:16 Nov 2021 18:56

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