Theoretical studies of interstellar molecular shocks. X - The chemical fractionation of deuterium in dark clouds

Details Theoretical studies of interstellar molecular shocks. X - The chemical fractionation of deuterium in dark clouds Theoretical studies of interstellar molecular shocks. X - The chemical fractionation of deuterium in dark clouds

Sep 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989mnras.240..167p&link_type=abstract

Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 240, Sept. 1, 1989, p. 167-177. Research supported by S

Astronomy and Astrophysics

Astronomy

25

Deuterium, Interstellar Chemistry, Interstellar Matter, Molecular Clouds, Abundance, Deuterium Compounds, Formyl Ions, Heavy Water, Hydroxyl Radicals, Shock Waves

Scientific paper

The chemical fractionation of deuterium into neutral oxygen-bearing species such as OH and H2O and ionic species such as H3(+) and HCO(+) is studied. The effects of a shock wave on the equilibrium state of the gas are considered. High degrees of fractionation are found in the cold, ambient medium. In the shock, the ratios H2D(+)/H3(+) and DCO(+)/HCO(+) are much reduced, whereas HDO/H2O remains practically frozen at the value (greater than 0.01) in the cold gas at equilibrium. The HDO/H2 ratio is sensitive to the value of the branching ratio in the dissociative recombination of H3O(+). The computed values of this ratio are compared with that deduced from observations of the hot core of Orion.

Affiliated with

Also associated with

No associations

Rating

Theoretical studies of interstellar molecular shocks. X - The chemical fractionation of deuterium in dark clouds does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Theoretical studies of interstellar molecular shocks. X - The chemical fractionation of deuterium in dark clouds, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Theoretical studies of interstellar molecular shocks. X - The chemical fractionation of deuterium in dark clouds will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-766133