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| EPoS Contribution |
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Isotopic Fractionation in Primitive Material: Quantifying the Contribution of Interstellar Chemistry
Steven Charnley NASA Goddard Space Flight Center, Greenbelt, MD, USA | |
| Anomalously fractionated isotopic material is found in many primitive Solar System objects, such as meteorites and comets. It is thought, in some cases, to trace interstellar matter that was incorporated into the Solar Nebula without undergoing significant processing. We will present the results of models of the nitrogen, oxygen, and carbon fractionation chemistry in dense molecular clouds, particularly in cores where substantial freeze-out of molecules on to dust has occurred. These models make several predictions that can be tested in the near future by molecular line observations. The range of fractionation ratios expected in different interstellar molecules will be discussed and compared to the ratios measured in molecular clouds, comets and meteoritic material. | |
| Collaborators: S. Rodgers, SETI, USA |
Suggested Session: Chemistry, Cores and Collapse, Molecular Clouds |