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Molecular Abundances in the Sgr a Molecular Cloud

Published online by Cambridge University Press:  07 August 2017

Y. C. Minh ,
W. M. Irvine  and
P. Friberg
Y. C. Minh
Affiliation:
Inst. of Space Sci. and Astronomy, Daejon 305-348, Korea
W. M. Irvine
Affiliation:
FCRAO, Univ. of Massachusetts, Amherst, MA 01003, USA
P. Friberg
Affiliation:
Onsala Space Observatory, S-439 00 Onsala, Sweden Joint Astronomy Centre, Hilo, HI 96720, USA

Abstract

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We have obtained column densities for HCO+, HCO, HCS+, C3H2, HC5N, SiO, OCS, HCOOH, CH3CH2 OH, and CH3CCH toward Sgr A. The fractional abundance of SiO relative to molecular hydrogen in Sgr A is comparable to that for the Orion plateau, ~ 10−7 − 10−8, which may be a typical value for hot clouds. The abundances of HCO, CH3CH2OH and CH3CCH all appear to be enhanced relative to other molecular clouds suc as Sgr B2.

Type
Quiescent Clouds and Regions of Star Formation
Information
Symposium - International Astronomical Union , Volume 150: Astrochemistry of Cosmic Phenomena , 1992 , pp. 223 - 224
Copyright
Copyright © Kluwer 1992 

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