- Observational tests for grain chemistry: posterior isotopic labelling
- Monthly Notices of the Royal Astronomical Society
- Pages (from-to)
- Document type
- Faculty of Science (FNWI)
- Anton Pannekoek Institute for Astronomy (API)
We propose a series of detailed observations that should allow current ideas concerning the important catalytic pathways to interstellar molecules on interstellar dust grains to be tested. The atoms and molecules that accrete on cold grains and take part in surface reactions will be selectively fractionated in 13C. Deeply embedded hot cores are surrounded by cold envelopes which still contain molecular ices that reflect the composition of the material evaporated into the hot gas. Recent Infrared Space Observatory observations of carbon dioxide ices towards embedded protostars have allowed the solid [12C/13C] ratio in CO2 to be measured for the first time. We therefore now have a means to test theories of grain chemistry by comparing the isotopic signature of abundant ice molecules with that of species derived from them and which are only detectable in the gas - isotopic labelling a posteriori.
- go to publisher's site
If you believe that digital publication of certain material infringes any of your rights or (privacy) interests, please let the Library know, stating your reasons. In case of a legitimate complaint, the Library will make the material inaccessible and/or remove it from the website. Please Ask the Library, or send a letter to: Library of the University of Amsterdam, Secretariat, Singel 425, 1012 WP Amsterdam, The Netherlands. You will be contacted as soon as possible.