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ABUNDANCE AND CHEMISTRY OF INTERSTELLAR HOCO+
ASTRONOMY AND ASTROPHYSICS
  • YC MINH
  • MK BREWER
  • William M. Irvine, University of Massachusetts - Amherst
  • P FRIBERG
  • LEB JOHANSSON
Publication Date
1991
Abstract
Column densities of 10 to the 15th/sq cm toward the Galactic center and not more than 10 to the 12th/sq cm for cold dark clouds are derived from observations using an LVG model, and the chemical implications are discussed. The HOCO(+) 4(04)-3(03) line toward Sgr A is mapped. The fractional abundance of HOCO(+) in the Galactic center region was found to be three orders of magnitude larger than predicted by quiescent ion-molecule chemistry and an order of magnitude larger than predicted by an MHD shock model. It is suggested that the possibly high CO2 abundance, and consequently the observed HOCO(+) abundance in the Galactic center, may result from UV photolysis of grain mantles.
Comments

The published version is located at http://adsabs.harvard.edu/full/1991A%26A...244..470M

Pages
470-476
Citation Information
YC MINH, MK BREWER, William M. Irvine, P FRIBERG, et al.. "ABUNDANCE AND CHEMISTRY OF INTERSTELLAR HOCO+" ASTRONOMY AND ASTROPHYSICS Vol. 244 Iss. 2 (1991)
Available at: http://works.bepress.com/wirvine/73/