Proc. IAU volume 13, issue S332, P233-236 2017 DOI: 10.1017/s1743921317007839 View full text
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Paolo Cazzoletti

Abstract: AbstractCN emission lines are among the brightest, and have been observed in the last 20 years with single dish observations. With modern interferometers, we are now able to spatially resolve CN emission, which often shows ring-like structures. We investigate whether such structures trace the morphology of the disks, or if they have a chemical origin. By using the thermochemical code DALI, we conclude that CN formation is triggered by the existence of vibrationally excited H2*, produced by FUV pumping of H2. H…

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