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HCN and HCO+ in IR Bright Galaxies

Published online by Cambridge University Press:  03 August 2017

Nguyen-Q-Rieu ,
J. Jackson ,
C. Henkel  and
R. Mauersberger
Nguyen-Q-Rieu
Affiliation:
Observatoire de Paris-Meudon, F-92195 Meudon Cedex, France
J. Jackson
Affiliation:
Max-Planck-Institut für Extraterrestrische Physik, D-8046 Garching, Germany
C. Henkel
Affiliation:
Observatoire de Paris-Meudon, F-92195 Meudon Cedex, France Max-Planck-Institut für Radioastronomie, D-5300 Bonn, Germany
R. Mauersberger
Affiliation:
Max-Planck-Institut für Radioastronomie, D-5300 Bonn, Germany

Abstract

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We report the preliminary results of a search for HCN and HCO+ in the nucleus of 14 IR bright galaxies. The line intensity ratio HCN/HCO+ is of the order of or larger than unity, except for M82 which has a line ratio of 0.5. The line ratios are discussed in terms of a model of chemistry of dense interstellar clouds. There is a correlation between the HCN and HCO+ line intensities and that of CO.

Type
IX- Galaxy Nuclei
Information
Symposium - International Astronomical Union , Volume 146: Dynamics of Galaxies and their Molecular Cloud Distributions , 1991 , pp. 299 - 301
Copyright
Copyright © Kluwer 1991 

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