Show pageOld revisionsBacklinksBack to top This page is read only. You can view the source, but not change it. Ask your administrator if you think this is wrong. ===== The detection of hydroxymethylium, H2COH+, in the ISM ===== Hydroxymethylium, also known os protonated formaldehyd, was detected toward Sgr B2(M) and (N), Orion KL, W51, and possibly in NGC 7538 and DR21(OH). It was not found toward several dark clouds. The account was reported by\\ M. Ohishi, S. Ishikawa, T. Amano, H. Oka, W. M. Irvine, J. E. Dickens, L. M. Ziurys, and A. J. Apponi,\\ **[[https://doi.org/10.1086/310325|Detection of a New Interstellar Molecular Ion, H<sub>2</sub>COH<sup>+</sup> (Protonated Formaldehyde)]]**\\ //Astrophys. J.// **471**, L61–L64 (1996).\\ Altogether, six transitions were observed between 31 and 174 GHz using the Nobeyama 45 m dish and the Kitt Peak 12 m dish. A. Bacmann, E. García-García, and A. Faure,\\ reported on the\\ **[[https://doi.org/10.1051/0004-6361/201628280|Detection of Protonated Formaldehyde in the Prestellar Core L1689B]]**\\ //Astron. Astrophys.// **588**, Art. No. L8 (2016).\\ The authors used the IRAM 30 m telescope to search for four transitions between 102 and 169 GHz. Three lower energy transitions were detected, the higher lying transition near 102 GHz was within the noise level, in agreement with a rotational temperature of about 10 K. ---- Contributor(s): H. S. P. Müller; 10, 2006; 04, 2016 ---- molecules/ism/hydroxymethylium.txt Last modified: 2019/10/23 17:15by mueller