Hydrogenation of CO on Pure Solid CO and CO-H2O Mixed Ice
Abstract
Using a cold (30 K) atomic hydrogen beam, hydrogenation of CO on pure solid CO and CO-H2O mixed ice is investigated at temperatures below 20 K. Hydrogenation proceeds efficiently on both pure solid CO and CO-H2O mixed ice below 12 K, but the rate of reaction on pure CO decreases significantly at 15 K compared to CO-H2O mixed ice. Hydrogenation of CO at 12 K and above is found to be promoted by H2CO and H2O molecules on the CO surface.
- Publication:
-
The Astrophysical Journal
- Pub Date:
- November 2004
- DOI:
- 10.1086/424815
- Bibcode:
- 2004ApJ...616..638W
- Keywords:
-
- Astrochemistry;
- ISM: Dust;
- Extinction;
- ISM: Molecules;
- Molecular Processes