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. ===== Observations of CO+ ===== CO<sup>+</sup> is a typical PDR molecule particularly intense in the molecular cloud/HII interface region. The two strongest fine structure lines of the //N// = 2 – 1 transition as well as one fs component of the 3 – 2 transition were detected in the vicinity of the M17SW cloud by\\ W. B. Latter, C. K. Walker, and P. R. Maloney,\\ **[[https://ui.adsabs.harvard.edu/abs/1993ApJ...419L..97L|Detection of the Carbon Monoxide Ion (CO<sup>+</sup>) in the Interstellar Medium and a Planetary Nebula]]**\\ //Astrophys. J.// **419**, L97–L100 (1993).\\ The strongest 2 – 1 line was also detected toward the planetary nebula NGC 7027; this is a late type star phase after the AGB (asymptotic giant branch) phase. The molecular cation has also been seen in the reflection nebula NGC 7023 which is in the vicinity of a Be star:\\ A. Fuente, J. Martin-Pintado,\\ **[[https://doi.org/10.1086/310532|Detection of CO<sup>+</sup> toward the Reflection Nebula NGC 7023]]**\\ //Astrophys. J.// **477**, L107–L109 (1997). C. Ceccarelli, E. Caux, M.Wolfire, A. Rudolph, B. Nisini, P. Saraceno, and G.J. White,\\ have reported on\\ **[[https://ui.adsabs.harvard.edu/abs/1998A%26A...331L..17C|ISO Detection of CO<sup>+</sup> toward the protostar IRAS 16293–2422]]**\\ //Astron. Astrophys.// **331**, L17–L20 (1998)\\ in rather highly excited rotational states (//N// = 14 – 13 to 21 – 20). The authors attributed this to J-shocks. ---- Contributor(s): H. S. P. Müller; 05, 2009 ---- molecules/ism/co-plus.txt Last modified: 2019/10/18 12:48by mueller