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Isotopic fractionation in interstellar molecules
| Content Provider | Scilit |
|---|---|
| Author | Furuya, Kenji |
| Copyright Year | 2017 |
| Description | The level of isotopic fractionation in molecules provides insights into their formation environments and how they formed. In this article, we review hydrogen and nitrogen isotopic fractionation in low-mass star-forming regions. Interstellar molecules are significantly enriched in deuterium. The importance of the nuclear spin states of light species on deuterium fractionation and the usefulness of singly and doubly deuterated molecules as chemical tracers are discussed. Observations have revealed that molecules in prestellar cores are enriched in or depleted $in^{15}$N depending on molecules. Compared with deuterium fractionation chemistry, our understanding $of^{15}$N fractionation chemistry is not well established. We briefly discuss $potential^{15}$N fractionation routes, i.e., isotopic-exchange reactions and isotopic selective photodissociation of $N_{2}$. In addition, the selective freeze-out $of^{15}$N atoms onto dust grains around the transition between N atoms and $N_{2}$is discussed as a potential mechanism that causes the depletion $of^{15}$N in the gas phase. |
| Related Links | http://arxiv.org/pdf/1711.04406 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/3E08138C7D2BD042DDB604803538C71D/S1743921317006810a.pdf/div-class-title-isotopic-fractionation-in-interstellar-molecules-div.pdf |
| Ending Page | 174 |
| Page Count | 12 |
| Starting Page | 163 |
| ISSN | 17439213 |
| e-ISSN | 17439221 |
| DOI | 10.1017/s1743921317006810 |
| Journal | Proceedings of the International Astronomical Union |
| Issue Number | S332 |
| Volume Number | 13 |
| Language | English |
| Publisher | Cambridge University Press (CUP) |
| Publisher Date | 2017-03-01 |
| Access Restriction | Open |
| Subject Keyword | Proceedings of the International Astronomical Union Physical Chemistry |
| Content Type | Text |
| Resource Type | Article |
| Subject | Astronomy and Astrophysics Space and Planetary Science |
