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molecules:ism:dme [2021/08/24 13:19] – mueller | molecules:ism:dme [2021/08/24 13:37] (current) – mueller | ||
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- | ===== On the Detection of Dimethyl Ether, (CH3)2O, in the ISM ===== | + | ===== On the Detection of Dimethyl Ether, (CH< |
L. E. Snyder, D. Buhl, P. R. Schwartz, F. O. Clark, D. R. Johnson, F. J. Lovas, and P. T. Giguere,\\ | L. E. Snyder, D. Buhl, P. R. Schwartz, F. O. Clark, D. R. Johnson, F. J. Lovas, and P. T. Giguere,\\ | ||
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The molecules is not only very abundant in hot cores, but it has also been detected toward a low-mass proto-star fairly recently:\\ | The molecules is not only very abundant in hot cores, but it has also been detected toward a low-mass proto-star fairly recently:\\ | ||
S. Cazaux, A. G. G. M. Tielens, C. Ceccarelli, A. Castets, V. Wakelam, E. Caux, B. Parise, D. Teyssier,\\ | S. Cazaux, A. G. G. M. Tielens, C. Ceccarelli, A. Castets, V. Wakelam, E. Caux, B. Parise, D. Teyssier,\\ | ||
- | **[[https:// | + | **[[https:// |
// | // | ||
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C. Richard, L. Margulès, E. Caux, C. Kahane, C. Ceccarelli, J.-C. Guillemin, R. A. Motiyenko, C. Vastel, and P. Groner\\ | C. Richard, L. Margulès, E. Caux, C. Kahane, C. Ceccarelli, J.-C. Guillemin, R. A. Motiyenko, C. Vastel, and P. Groner\\ | ||
reported on\\ | reported on\\ | ||
- | **[[https:// | + | **[[https:// |
//Astron. Astrophys.// | //Astron. Astrophys.// | ||
Four frequency windows between 100 and 220 GHz were observed with the IRAM 30 m single dish telescope. Four transitions of the symmetric conformer as well as six transitions of the asymmetric conformer were detected. Non of the transitions showed torsional splitting. The only one, which was expected to show such splitting, was overlapped. It was one of the four transitions of the symmetric conformer. The high degree of deuteration (about 15 %) suggests that doubly deuterated isotopologs may be detectable at least with ALMA or other interferometers.\\ | Four frequency windows between 100 and 220 GHz were observed with the IRAM 30 m single dish telescope. Four transitions of the symmetric conformer as well as six transitions of the asymmetric conformer were detected. Non of the transitions showed torsional splitting. The only one, which was expected to show such splitting, was overlapped. It was one of the four transitions of the symmetric conformer. The high degree of deuteration (about 15 %) suggests that doubly deuterated isotopologs may be detectable at least with ALMA or other interferometers.\\ | ||
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S. E. Bisschop, P. Schilke, F. Wyrowski, A. Belloche, C. Brinch, C. P. Endres, R. Güsten, H. Hafok, S. Heyminck, J. K. Jørgensen, H. S. P. Müller, K. M. Menten, R. Rolffs, and S. Schlemmer, | S. E. Bisschop, P. Schilke, F. Wyrowski, A. Belloche, C. Brinch, C. P. Endres, R. Güsten, H. Hafok, S. Heyminck, J. K. Jørgensen, H. S. P. Müller, K. M. Menten, R. Rolffs, and S. Schlemmer, | ||
reported on\\ | reported on\\ | ||
- | **[[https:// | + | **[[https:// |
//Astron. Astrophys.// | //Astron. Astrophys.// | ||
A plethora of rotational transitions have been detected with the APEX 12 m single dish telescope in the course of a line survey covering frequencies in the 1.3, 1.0, 0.9, 0.43, and 0.37 mm wavelength regions. The vibrations are at about 200 and 240 cm< | A plethora of rotational transitions have been detected with the APEX 12 m single dish telescope in the course of a line survey covering frequencies in the 1.3, 1.0, 0.9, 0.43, and 0.37 mm wavelength regions. The vibrations are at about 200 and 240 cm< | ||
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reported on the\\ | reported on the\\ | ||
**[[https:// | **[[https:// | ||
- | //Astron. Astrophys.// | + | //Astron. Astrophys.// |
+ | The isotopolog was detected through numerous transitions in the course of the Protostellar Interferometric Line Survey (PILS) of IRAS 16293−2422 with ALMA between 329.1 and 362.9 GHz. The column density of this doubly deuterated isotopolog is roughly a factor of five higher than what would be extrapolated from the un- and sinly deuterated isotopologs, | ||