Molecular abundances in the Sagittarius A molecular cloud

Astron Astrophys. 1992:258:489-94.

Abstract

We have obtained column densities for HCO+, HCO, HCS+, C3H2, HC5N, SiO, OCS, HCOOH, CH3CH2OH, 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, approximately 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 such as Sgr B2.

Publication types

  • Research Support, U.S. Gov't, Non-P.H.S.

MeSH terms

  • Astronomical Phenomena
  • Astronomy
  • Chemical Phenomena
  • Chemistry
  • Exobiology
  • Extraterrestrial Environment*
  • Hydrocarbons / analysis*
  • Mathematics
  • Models, Molecular*
  • Oxides / analysis
  • Silicon / analysis*
  • Silicon Compounds / analysis
  • Solar System*
  • Spectrum Analysis

Substances

  • Hydrocarbons
  • Oxides
  • Silicon Compounds
  • Silicon