| Next revision | Previous revision |
| molecules:ism:mex [2019/02/25 22:38] – external edit 127.0.0.1 | molecules:ism:mex [2020/09/18 15:33] (current) – mueller |
|---|
| E. C. Fayolle, K. I. Öberg, J. K. Jørgensen, K. Altwegg, H. Calcutt, H. S. P. Müller, M. Rubin, M. H. D. van der Wiel, P. Bjerkeli, T. L. Bourke, A. Coutens, E. F. van Dishoeck, M. N. Drozdovskaya, R. T. Garrod, N. F. W. Ligterink, M. V. Persson, S. F. Wampfler, and the ROSINA team\\ | E. C. Fayolle, K. I. Öberg, J. K. Jørgensen, K. Altwegg, H. Calcutt, H. S. P. Müller, M. Rubin, M. H. D. van der Wiel, P. Bjerkeli, T. L. Bourke, A. Coutens, E. F. van Dishoeck, M. N. Drozdovskaya, R. T. Garrod, N. F. W. Ligterink, M. V. Persson, S. F. Wampfler, and the ROSINA team\\ |
| reported on the\\ | reported on the\\ |
| [[http://dx.doi.org/%2010.1038/s41550-017-0237-7|Protostellar and Cometary Detections of Organohalogens]]\\ | [[https://doi.org/10.1038/s41550-017-0237-7|Protostellar and Cometary Detections of Organohalogens]]\\ |
| //Nat. Astron.// **1** (2017), 703–708.\\ | //Nat. Astron.// **1** (2017), 703–708.\\ |
| The //J// = 13 – 12 transitions with //K// = 0 to 4 of methyl chloride, CH<sub>3</sub>Cl, were detected with ALMA near 345.4 and 340.1 GHz for the <sup>35</sup>Cl and <sup>37</sup>Cl isotopologs, respectively, in emission toward the Solar-type protostar IRAS 16293–2422B. CH<sub>3</sub><sup>35</sup>Cl was also seen toward the companion IRAS 16293–2422A. The <sup>35</sup>Cl/<sup>37</sup>Cl ratio is about 2.1, the same as observed for HCl in that source, but slightly lower than 3.13 on Earth.\\ | The //J// = 13 – 12 transitions with //K// = 0 to 4 of methyl chloride, CH<sub>3</sub>Cl, were detected with ALMA near 345.4 and 340.1 GHz for the <sup>35</sup>Cl and <sup>37</sup>Cl isotopologs, respectively, in emission toward the Solar-type protostar IRAS 16293–2422B. CH<sub>3</sub><sup>35</sup>Cl was also seen toward the companion IRAS 16293–2422A. The <sup>35</sup>Cl/<sup>37</sup>Cl ratio is about 2.1, the same as observed for HCl in that source, but slightly lower than 3.13 on Earth.\\ |
| Moreover, the finding of methyl chloride in the comet 67P/Churiumov-Gerassimenko combined with model calculations suggest that comets may have brought an amount of CH<sub>3</sub>Cl to Earth that is a fair fraction of the part from natural sources. And this may well apply to exo-planets.\\ | Moreover, the finding of methyl chloride in the comet 67P/Churiumov-Gerassimenko combined with model calculations suggest that comets may have brought an amount of CH<sub>3</sub>Cl to Earth that is a fair fraction of the part from natural sources. And this may well apply to exo-planets.\\ |
| The author also report the tentative detection of methyl fluoride, CH<sub>3</sub>F, via its //J// = 7 – 6 transitions with //K// = 0 to 3. However, the lines with //K// = 2 and 3 are blended with some much stronger lines, and the other two lines are quite weak.\\ | The author also report the tentative detection of methyl fluoride, CH<sub>3</sub>F, via its //J// = 7 – 6 transitions with //K// = 0 to 3. However, the lines with //K// = 2 and 3 are blended with some much stronger lines, and the other two lines are quite weak.\\ |
| See also ESO press releases [[http://www.hq.eso.org/public/news/eso1732/|in English]] or [[https://www.eso.org/public/germany/news/eso1732/|in German]] or the press release of the [[https://www.portal.uni-koeln.de/9015.html?&tx_news_pi1%5Bnews%5D=4696&tx_news_pi1%5Bcontroller%5D=News&tx_news_pi1%5Baction%5D=detail&cHash=7b1c059e33b4e37579bd2b93a908353d|Universität zu Köln]] (in German). | See also ESO press releases [[http://www.hq.eso.org/public/news/eso1732/|in English]] or [[https://www.eso.org/public/germany/news/eso1732/|in German]] or the press release of the [[https://portal.uni-koeln.de/universitaet/aktuell/presseinformationen/detail/methylchlorid-im-all-entdeckt-das-molekuel-ist-kein-hinweis-auf-ausserirdisches-leben|Universität zu Köln]] (in German). |
| |
| |
| |
| Contributor(s): H. S. P. Müller 10, 2017 | Contributor(s): H. S. P. Müller 10, 2017 |
| |
| |
| ---- | ---- |
| |
| |